Home > Store

IP Subnetting from Beginning to Mastery LiveLessons (Video Training)

Online Video

Register your product to gain access to bonus material or receive a coupon.

The $50.00 price is a limited-time offer and expires December 31, 2025. This title is not eligible for coupon-based discounts. Offer subject to change.

Description

  • Copyright 2020
  • Edition: 1st
  • Online Video
  • ISBN-10: 0-13-549777-9
  • ISBN-13: 978-0-13-549777-7

12+ Hours of Video Instruction

 Overview
To build the networks used throughout the world you must understand the single most important networking protocol: Internet Protocol, or IP. IP itself has several components, most notably IP addressing, IP routing, IP routing protocols, and of course, IP subnetting. 

Unfortunately, learning IP subnetting can be a big challenge. For example, IP subnetting includes many interwoven ideas, and many common tasks in networking require knowledge of those fundamentals. However, output and figures that describe IP networks do not describe the underlying concepts; they just list the numeric facts about addresses and subnets. Without proper background knowledge, people can struggle to connect the facts to the ideas and make the correct conclusions.

Additionally, subnetting math causes the kinds of challenges to both new learners and long-time IT practitioners. Subnetting math works a lot like math word problems did for us all back in school. Thankfully, all the subnetting math can be understood with a little explanation and practice. However, subnetting includes enough different ideas, terms, and math processes so that you might struggle in choosing what number you need to find, what math process to use, and what the results mean once calculated. 

This complete IP version 4 (IPv4) subnetting course sets out to solve these problems. The course works through a series of topics about some big ideas, followed by the related subnetting math, and then has available practice for you to build the skill level you need for your purposes. No matter your motivation or current job role, this course helps you

  • Learn subnetting: Understand the ideas and terms in each part of IPv4 subnetting, how to use the ideas in the related mathematical processes, and the purpose and meaning of the facts learned by those processes.
  • Do subnetting: Work through a sequence to first learn by seeing the process, and then transition to doing the process through practice problems with video explanations, internalizing the process so you can do it on your own. 
  • Go faster at subnetting: For those who work with subnetting math every week, or who are studying for certification exams, you must also practice to become fast at these processes. The course discusses speed goals, how to practice for speed, and how to set reasonable speed expectations.


Whether you just want to finally understand subnetting, want to finally be able to do the math, or need to be ready to breeze through the Cisco CCNA exam, this course can help you master IPv4 subnetting. Be better at understanding the ideas, have better conversations at work, be more effective at troubleshooting, reduce the time pressure on Cisco exams---all these can be achieved with this course.
 
Skill Level: Beginner
Learn How To
  • Understand how the subnet ID and subnet mask together represent a subnet.
  • Identify and describe IPv4 addressing and subnetting processes that can be used to reveal facts about a TCP/IP subnet. 
  • Understand the concepts, and perform the math to find a subnet ID and subnet broadcast address, and find the range of IP addresses in the subnet, beginning with an IP address and mask.
  • Understand the meaning and purpose of subnet masks, and perform the math to manipulate masks into different formats.
  • Describe the details of the IPv4 address space and address classes, and predict facts about a class A, B, or C network.
  • Understand the differences between the choices enterprises make when using entire public IP networks, entire private IP networks, and/or smaller public CIDR blocks in their enterprise networks.
  • Analyze and describe a corporate subnetting plan, using correct terms and math processes about the number of subnets in the design, the number of host addresses in each subnet, and the possible subnet IDs per the design.
  • Describe how a subnet mask controls the specifics of a subnetting design.
  • Analyze the mask used in a design to determine the number of subnets created and the number of hosts per subnet.
  • Develop a personalized plan for the degree to which you plan to learn each subnetting math process for everyday use and for any upcoming exams.
  • Describe what it means to use Variable Length Subnet Masks (VLSM) and how using VLSM impacts various subnetting processes.



Who Should Take This Course
  • IT professionals  who want to understand subnetting concepts and the math, even if they choose to rely on a calculator after class
  • Networking professionals  who need to master subnetting concepts, understand all the math, and perform at least some of the math processes on their own without a calculator regularly in their jobs
  • Network certification candidates  (Cisco CCNA, CCNP, CompTIA Network+, and so on) who need to be ready to do the math, with no calculator and no reference information, at speed, at least for exam day
 
Course Requirements
  • No required prerequisites
  • Useful suggested reading prior to using the product: You will appreciate the subnetting topics of this class if you know the most basic concepts of IPv4 routing, routers, LANs, and WANs beforehand. You can get that level of knowledge from reading these chapters in the book, CCNA 200-301 Official Cert Guide, Volume 1. In particular:
    • Chapter 2: Fundamentals of Ethernet LANs
    • Chapter 3: Fundamentals of WANs and IP Routing
    • Chapter 8: Implementing Ethernet Virtual LANs, using only the section titled Virtual LAN Concepts


Materials, Downloads, or Supplemental Content Needed in Advance
  • None


Lesson descriptions:  
Lesson 1: How to Best Use This Course
This lesson includes several videos with advice on how to go about learning IP subnetting and discusses options for more subnetting practice for those who want to quickly answer subnetting questions for exam prep.

Lesson 2: IP Features Related to Subnetting
This lesson discusses the fundamentals of three TCP/IP features related to IP subnetting: IP addressing, IP routing, and IP routing protocols.

Lesson 3: IP Subnetting Defined
This lesson defines and identifies the core concepts of what an IP subnet is and what it means to subnet a network.

Lesson 4: Finding Subnet Facts - /16 and /24 Masks
Lesson 4 introduces the ideas and processes related to finding facts about a subnet; namely, the subnet ID, the subnet broadcast address, and the range of addresses usable as host addresses. The lesson shows you the concepts and processes for the limited cases of using mask values of /16 and /24, which are the two easiest cases mathematically. 

Lesson 5: Video QA: Find Subnet Facts with Easy Masks
Lesson 5 provides a series of video practice questions that use the process detailed in Lesson 4 to find the facts about a subnet.

Lesson 6: Finding Subnet Facts - Difficult Masks
Lesson 6 takes the subnetting process introduced in Lesson 4 and adds the details for the same process when using mathematically difficult masks. The process answers the same questions as Lesson 4: given an address and a mask, what are the subnet ID, the subnet broadcast address, and the range of addresses usable as host addresses? The lesson focuses on cases in which the mask is neither /16 nor /24. 

Lesson 7: Video QA: Find Subnet Facts, Difficult Masks
Lesson 7 provides a series of practice question videos that use the process detailed in Lesson 6 to find the facts about a subnet, particularly for cases with difficult masks (that is, when the mask is neither /16 nor /24).

Lesson 8: Subnet Mask Concepts and Formats
Lesson 8 begins with two videos about subnet masks: one that explains the core concepts of what a mask is and how it is used, and another that explains the three mask formats. The rest of Lesson 8 focuses on two processes: 
  1. To convert from a prefix mask to a binary mask and then finally to a dotted-decimal mask
  2. Vice versa 


Lesson 9: Video QA: Convert Subnet Masks
Lesson 9 provides a series of practice question videos that use the process detailed in Lesson 8:
  • Half about converting from DDN to prefix
  • Half about converting from prefix to DDN

Lesson 10: Understanding the IPv4 Address Space
Lesson 10 contains several videos that together tell the story of how enterprises use IPv4 addresses. That story weaves through the idea of public and private IP addresses and shows why many companies use a private class A, B, or C network---which is why most IPv4 subnetting subdivides one or more of these private IP networks.

Lesson 11: Finding IP Network Facts
Module 2's Lessons 5 and 7 show how to find facts about IP subnets. Lesson 11 shows you how to find facts about the Class A, B, and C IP networks. The videos in this lesson focus on the processes to list facts about IP networks and, given an IP address and mask, to find
  • The network ID
  • The network broadcast address
  • The range of addresses usable as host addresses

Lesson 12: Video QA: Finding IP Network Facts
Lesson 12 provides a series of practice question videos that use the process detailed in Lesson 10. In particular, each QA asks you to
  • List facts about classful networks, such as the class and default mask
  • Calculate the network ID and network broadcast address

Lesson 13: Noticing Patterns in Subnet IDs
This entire module focuses on interpreting an existing subnetting design---a design that implies a list of subnet IDs. Lesson 13 shows the numeric patterns you can find in the lists of subnet IDs so that you can have more confidence as you work through the details in the processes in the upcoming lessons in this module. 

Lesson 14: Finding All Subnets: Exactly 256 Subnets
Lesson 14 shows how to list all the subnet IDs in an existing design, assuming either of the two simplest cases, including
  • Subnetting a class A network with a /16 mask
  • Subnetting a class B network with a /24 mask


Lesson 15: Video QA: Find All Subnets with 256 Subnets
Lesson 15 provides a series of practice question videos that use the process detailed in Lesson 14. In particular, each QA asks you to list the first four and last four subnet IDs in a design.

Lesson 16: Finding All Subnets: Less Than 256
Lesson 16 shows how to list all the subnet IDs in an existing design. However, this lesson expands to include more challenging cases compared to Lesson 14; namely, cases with fewer than 256 subnets. Those cases happen to use masks other than /16 and /24, a fact that makes the math processes require some extra steps.

Lesson 17: Video QA: Find All Subnets, Less Than 256
Lesson 17 provides a series of practice question videos that use the process detailed in Lesson 16. In particular, each QA asks you to list the first four and last four subnet IDs in a design.

Lesson 18: Finding All Subnets: More Than 256
Lesson 18 provides details for anyone who wants to cover every case of how to list all subnets. Lesson 18 focuses on cases with more than 256 subnets. Those cases use more difficult masks and more detailed processes and, as a result, require more work. 

Lesson 19: Video QA: Find All Subnets, More Than 256
Lesson 19 provides a series of practice question videos that use the process detailed in Lesson 18. In particular, each QA asks you to list the first four and last four subnet IDs in a design.

Lesson 20: Interpreting Existing Subnet Masks
Lesson 20 explains logic and processes that make the following assumptions:
  • Someone else chose a class A, B, or C network.
  • Someone else performed a subnet design and chose one mask to use for all subnets.

Lesson 20 shows how to interpret that design to find the number of hosts per subnet in each subnet and the number of subnets in the network.

Lesson 21: Video QA: Interpreting Existing Subnet Masks
Lesson 21 provides a series of practice question videos that use the process detailed in Lesson 20. Each question gives you the design---a class A, B, or C network, along with the one mask used---and you find these values:
  • The number of hosts per subnet in each subnet
  • The number of subnets in the network

Lesson 22: Choosing a Subnet Mask
Lesson 22 places you as the designer of the subnetting plan. In particular, you begin the process with some gathered requirements like these:
  • A class A, B, or C network
  • The required number of hosts per subnet the design should create
  • The required number of subnets the design should create
  • A requirement to use one mask value, and one mask value only, for all subnets
Your job is to decide what single mask value would work. This lesson discusses the process and shows several examples. 

Lesson 23: Video QA: Choosing a Subnet Mask
Lesson 23 provides a series of practice question videos that use the process detailed in Lesson 22. Each question gives you the design requirements as follows, and you list the mask value(s) that would meet the requirements:
  • A class A, B, or C network
  • The required number of hosts per subnet the design should create
  • The required number of subnets the design should create
  • A requirement to use one mask value, and one mask value only, for all subnets


Lesson 24: Variable Length Subnet Masks (VLSM) Basics
Lesson 24 defines the concept of variable length subnet masks (VLSM)a subnet design choice in which the subnets of a single class A, B, or C network use more than one subnet mask. That single statement defines VLSM, but VLSM and its impact can be easily misunderstood. Lesson 24 sets about explaining the facts and then explaining the design tradeoffs of the choice of whether to use VLSM.

Lesson 25: Finding VLSM Overlaps
The chance of making a mathematical mistake in a subnet design is relatively low when not using VLSM but more likely when using VLSM. In particular, a design mistake might create two subnets whose address ranges overlap---and with VLSM, it is more difficult to notice that mistake. Lesson 25 defines the issues surrounding this type of design mistake, and then presents an organized process you can use to discover any such overlapping IP subnets. 

Lesson 26: Video QA: Find VLSM Overlaps
Lesson 26 provides a series of practice question videos that use the process detailed in Lesson 25. Each question gives you a set of planned IP addresses/masks. Your job: Discover whether any of the subnets implied by the address/mask pairs overlap.

Lesson 27: Adding New VLSM Subnets
When not using VLSM, you can calculate all the subnet IDs in the design beforehand, and that process results in a list of subnets with no overlapping addresses. When using VLSM, you cannot predict and pre-list a list of subnets. Then, each time you need a new subnet, you choose a mask to use, and you need to find a new subnet ID that does not overlap with any existing subnets---a process that can result in mistakes that result in address overlaps.
Lesson 27 defines the issues surrounding this type of design mistake, and then presents an organized process you can use to choose a new subnet ID to use in a design. 

Lesson 28: Video QA: Adding VLSM Subnets
Lesson 28 provides a series of practice question videos that use the process detailed in Lesson 27. Each question gives you
  • A set of existing (deployed) IP subnets
  • The mask for a presumptive new subnet ID

Your job: Find the numerically lowest new subnet ID you could add to the design without overlapping with any of the existing subnets.

Lesson 29: Subnetting on the Exams
If your goal is to pass the CCNA exam, you should watch and consider the advice in all the videos in this lesson. This lesson focuses on the difference between learning subnetting for your everyday job in networking versus being ready to pass the exam. 
In particular, this lesson walks you through how to be ready for subnetting questions in the exam. That includes a discussion of the exam and the fact that you might want to plan to use some tables and tools on the exam. It also includes a suggestion for an honest self-assessment of your skills (% correct) and speed, both of which are important for the exam. The lesson closes with some suggestions for where to get more practice---and anyone wanting to do well on the CCNA exam can always use more subnetting practice.


About Pearson Video Training
Pearson publishes expert-led video tutorials covering a wide selection of technology topics designed to teach you the skills you need to succeed. These professional and personal technology videos feature world-leading author instructors published by your trusted technology brands: Addison-Wesley, Cisco Press, Pearson IT Certification, Prentice Hall, Sams, and Que. Topics include IT Certification, Network Security, Cisco Technology, Programming, Web Development, Mobile Development, and more. Learn more about Pearson Video training at http://www.informit.com/video.

Video lessons are available for download for offline viewing within the streaming format. Look for the green arrow in each lesson.

Sample Content

Table of Contents

Introduction
IP Subnetting from Beginning to Mastery: Introduction
Module 1: Introduction to Subnetting
Module introduction
Lesson 1: How to Best Use This Course
Learning objectives
1.1 Subnetting Course Organization
1.2 Subnetting Learning Stages
1.3 Subnetting Practice Options
1.4 Reference Charts
Lesson 2: IP Features Related to Subnetting
Learning objectives
2.1 IP Addressing
2.2 IP Routing
2.3 IP Routing Protocols
Lesson 3: IP Subnetting Defined
Learning objectives
3.1 IP Subnets: Topologies
3.2 IP Subnets: Concepts
3.3 IP Subnets: Math
Module 2: Analyzing Existing Subnets
Module introduction
Lesson 4: Finding Subnet Facts - /16 and /24 Masks
Learning objectives
4.1 Process: Find Subnet Facts with Easy (/16, /24) Masks
4.2 Experiencing the Process - Example 1, Class A, /24
4.3 Experiencing the Process - Example 2, Class B, /24
4.4 Experiencing the Process - Example 3, Class A, /16
4.5 How and Where to Practice
Lesson 5: Video QA: Find Subnet Facts with Easy Masks
Learning objectives
5.1 QA 1: Find Subnet Facts, Class B, /24
5.2 QA 2: Find Subnet Facts, Class B, /24
5.3 QA 3: Find Subnet Facts, Class A, /24
5.4 QA 4: Find Subnet Facts, Class A, /24
5.5 QA 5: Find Subnet Facts, Class A, /16
5.6 QA 6: Find Subnet Facts, Class A, /16
Lesson 6: Finding Subnet Facts - Difficult Masks
Learning objectives
6.1 Process: Find Subnet Facts with Difficult Masks
6.2 Experiencing the Process - Example 1: 10.1.7.3 /23
6.3 Experiencing the Process - Example 2: 172.16.55.56 /20
6.4 Experiencing the Process - Example 3: 10.200.100.100 /26
6.5 Experiencing the Process - Example 4: 10.200.100.200 /14
6.6 How and Where to Practice
Lesson 7: Video QA: Find Subnet Facts, Difficult Masks
Learning objectives
7.1 QA 1: Find Subnet Facts, Class A, /15
7.2 QA 2: Find Subnet Facts, Class A, /13
7.3 QA 3: Find Subnet Facts, Class A, /12
7.4 QA 4: Find Subnet Facts, Class A, /11
7.5 QA 5: Find Subnet Facts, Class B, /19
7.6 QA 6: Find Subnet Facts, Class B, /22
7.7 QA 7: Find Subnet Facts, Class B, /21
7.8 QA 8: Find Subnet Facts, Class B, /18
7.9 QA 9: Find Subnet Facts, Class C, /25
7.10 QA 10: Find Subnet Facts, Class C, /27
7.11 QA 11: Find Subnet Facts, Class C, /29
7.12 QA 12: Find Subnet Facts, Class C, /30
Module 3: Converting Subnet Masks
Module introduction
Lesson 8: Subnet Mask Concepts and Formats
Learning objectives
8.1 Subnet Mask Concepts
8.2 Subnet Mask Formats
8.3 Process: Converting DDN to Prefix Masks
8.4 Experiencing the Process - Convert DDN to Prefix Mask: Three Examples
8.5 Process: Converting Prefix to DDN Masks
8.6 Experiencing the Process - Convert Prefix to DDN Masks: Three Examples
8.7 How and Where to Practice
Lesson 9: Video QA: Convert Subnet Masks
Learning objectives
9.1 QA 1: Convert Subnet Masks, 255.255.255.248
9.2 QA 2: Convert Subnet Masks, 255.255.255.192
9.3 QA 3: Convert Subnet Masks, 255.255.254.0
9.4 QA 4: Convert Subnet Masks, 255.255.224.0
9.5 QA 5: Convert Subnet Masks, 255.252.0.0
9.6 QA 6: Convert Subnet Masks, /30
9.7 QA 7: Convert Subnet Masks, /25
9.8 QA 8: Convert Subnet Masks, /22
9.9 QA 9: Convert Subnet Masks, /18
9.10 QA 10: Convert Subnet Masks, /13
Module 4: Analyzing IP Networks
Module introduction
Lesson 10: Understanding the IPv4 Address Space
Learning objectives
10.1 IP Networks Vs. IP Subnets
10.2 Public IP Networks
10.3 IPv4 Address Classes: Class A
10.4 IPv4 Address Classes: Class B
10.5 IPv4 Address Classes: Class C
10.6 Default Masks
10.7 Private IP Networks
10.8 CIDR Blocks
Lesson 11: Finding IP Network Facts
Learning objectives
11.1 Process: Listing Basic Facts about IP Networks
11.2 Process: Calculating Facts about IP Networks
11.3 Experiencing the Process: Example 1 - 172.21.1.1
11.4 Experiencing the Process: Example 2 - 200.3.4.5
11.5 Experiencing the Process: Example 3 - 9.99.199.9
11.6 How and Where to Practice
Lesson 12: Video QA: Finding IP Network Facts
Learning objectives
12.1 QA 1: Find Network Facts, 10.155.18.97
12.2 QA 2: Find Network Facts, 172.21.134.243
12.3 QA 3: Find Network Facts, 192.168.56.87
12.4 QA 4: Find Network Facts, 192.168.219.176
12.5 QA 5: Find Network Facts, 172.22.18.35
12.6 QA 6: Find Network Facts, 55.66.77.88
12.7 QA 7: Find Network Facts, 172.24.1.223
12.8 QA 8: Find Network Facts, 172.26.223.42
12.9 QA 9: Find Network Facts, 192.168.119.95
12.10 QA 10: Find Network Facts, 192.168.200.1
Module 5: Finding All Subnets in a Network
Module introduction
Lesson 13: Noticing Patterns in Subnet IDs
Learning objectives
13.1 Subnet ID Patterns When Using 1 Easy Mask
13.2 Subtle Subnet ID Patterns When Using 1 Difficult Mask
13.3 Using Classful Addressing Logic to Identify the Number of Subnets
Lesson 14: Finding All Subnets: Exactly 256 Subnets
Learning objectives
14.1 Process Overview: List of All Subnets of a Network
14.2 Process Details: List All Subnets, Class B, 256 Subnets
14.3 Experiencing the Process: List All Subnets, Class B, /24
14.4 Process Details: List All Subnets, Class A, 256 Subnets
14.5 Experiencing the Process: List All Subnets, Class A, /16
14.6 How and Where to Practice
Lesson 15: Video QA: Find All Subnets with 256 Subnets
Learning objectives
15.1 QA 1: Find All Subnets, 172.21.0.0, /24
15.2 QA 2: Find All Subnets, 172.22.0.0, /24
15.3 QA 3: Find All Subnets, 172.23.0.0, /24
15.4 QA 4: Find All Subnets, 172.24.0.0, /24
15.5 QA 5: Find All Subnets, 172.25.0.0, /24
15.6 QA 6: Find All Subnets, 16.0.0.0, /16
15.7 QA 7: Find All Subnets, 17.0.0.0, /16
15.8 QA 8: Find All Subnets, 18.0.0.0, /16
15.9 QA 9: Find All Subnets, 19.0.0.0, /16
15.10 QA 10: Find All Subnets, 20.0.0.0, /16
Lesson 16: Finding All Subnets: Less Than 256
Learning objectives
16.1 Designs that Result in Less than 256 Subnets
16.2 Process: Finding All Subnets: Class A, <256 Subnets
16.3 Experiencing the Process: Example, Class A, /15
16.4 Process: Finding All Subnets: Class B, <256 Subnets
16.5 Experiencing the Process: Example, Class B, /20
16.6 Process: Finding All Subnets: Class C, <256 Subnets
16.7 Experiencing the Process: Example, Class C, /29
16.8 How and Where to Practice
Lesson 17: Video QA: Find All Subnets, Less Than 256
Learning objectives
17.1 QA 1: Find All Subnets, Class A, Mask /10
17.2 QA 2: Find All Subnets, Class A, Mask /11
17.3 QA 3: Find All Subnets, Class A, Mask /12
17.4 QA 4: Find All Subnets, Class A, Mask /14
17.5 QA 5: Find All Subnets, Class B, Mask /17
17.6 QA 6: Find All Subnets, Class B, Mask /18
17.7 QA 7: Find All Subnets, Class B, Mask /19
17.8 QA 8: Find All Subnets, Class B, Mask /21
17.9 QA 9: Find All Subnets, Class C, Mask /25
17.10 QA 10: Find All Subnets, Class C, Mask /26
17.11 QA 11: Find All Subnets, Class C, Mask /28
17.12 QA 12: Find All Subnets, Class C, Mask /30
Lesson 18: Finding All Subnets: More Than 256
Learning objectives
18.1 Designs that Result in More than 256 Subnets
18.2 Process: Finding All Subnets: Class A, >256 Subnets
18.3 Process: Finding All Subnets: Class B, >256 Subnets
18.4 Process: Finding All Subnets: Class A, >65,536 Subnets
18.5 How and Where to Practice
Lesson 19: Video QA: Find All Subnets, More Than 256
Learning objectives
19.1 QA 1: Class A, Mask /20
19.2 QA 2: Class A, Mask /18
19.3 QA 3: Class B, Mask /28
19.4 QA 4: Class B, Mask /26
19.5 QA 5: Class A, Mask /28
Module 6: Subnet Masks and Subnet Design
Module introduction
Lesson 20: Interpreting Existing Subnet Masks
Learning objectives
20.1 Process: Finding the Number of Hosts/Subnet
20.2 Experiencing the Process: Finding the Number of Hosts/Subnet
20.3 Process: Finding the Number of Subnets
20.4 Experiencing the Process: Finding the Number of Subnets
20.5 How and Where to Practice
Lesson 21: Video QA: Interpreting Existing Subnet Masks
Learning objectives
21.1 QA 1: Class A, Mask /18
21.2 QA 2: Class B, Mask /18
21.3 QA 3: Class A, Mask /27
21.4 QA 4: Class B, Mask /27
21.5 QA 5: Class C, Mask /27
21.6 QA 6: Class A, Mask /29
21.7 QA 7: Class B, Mask /29
21.8 QA 8: Class C, Mask /29
Lesson 22: Choosing a Subnet Mask
Learning objectives
22.1 Logic for Choosing a Mask Based on Requirements
22.2 Process: Choosing Masks Based on Requirements
22.3 Experiencing the Process: Choosing the Masks, Example 1
22.4 Experiencing the Process: Choosing the Masks, Example 2
22.5 Experiencing the Process: Choosing the Masks, Example 3
22.6 How and Where to Practice
Lesson 23: Video QA: Choosing a Subnet Mask
Learning objectives
23.1 QA 1: Choosing the Masks
23.2 QA 2: Choosing the Masks
23.3 QA 3: Choosing the Masks
23.4 QA 4: Choosing the Masks
23.5 QA 5: Choosing the Masks
Module 7: Variable Length Subnet Masks (VLSM)
Module introduction
Lesson 24: Variable Length Subnet Masks (VLSM) Basics
Learning objectives
24.1 Recognizing VLSM
24.2 How VLSM Conserves IP Addresses
24.3 VLSM Pros and Cons
24.4 Preparing for VLSM Exam Questions
Lesson 25: Finding VLSM Overlaps
Learning objectives
25.1 Finding VLSM Overlaps
25.2 Experiencing the Process: Find VLSM Overlaps
25.3 How and Where to Practice
Lesson 26: Video QA: Find VLSM Overlaps
Learning objectives
26.1 QA 1: Find VLSM Overlaps
26.2 QA 2: Find VLSM Overlaps
26.3 QA 3: Find VLSM Overlaps
Lesson 27: Adding New VLSM Subnets
Learning objectives
27.1 Defining the Process to Add New VLSM Subnets
27.2 Experiencing the Process: Add New VLSM Subnets Example 1
27.3 Experiencing the Process: Add New VLSM Subnets Example 2
27.4 How and Where to Practice
Lesson 28: Video QA: Adding VLSM Subnets
Learning objectives
28.1 QA 1: Adding VLSM Subnets
28.2 QA 2: Adding VLSM Subnets
28.3 QA 3: Adding VLSM Subnets
Module 8: Subnetting on Cisco Exams
Module introduction
Lesson 29: Subnetting on the Exams
Learning objectives
29.1 CCNA Exam Overview
29.2 Exam Day Tactics for Subnetting
29.3 Self-Assessment of Your Subnetting Skills
29.4 Perfecting Your Subnetting Skills: Your Next Steps
Summary
IP Subnetting from Beginning to Mastery: Summary 

Updates

Submit Errata

More Information

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020