- Designing and Deploying Cisco Unified IM and Presence
- Feb 25, 2016
- This chapter describes the Cisco Unified Communications IM and Presence (IM&P) architecture and design.
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- WAN Technologies: Important Points of Interest, Part 3 of 3
- Jan 13, 2016
- Concluding this three-part series on WAN technologies, Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, Academic Edition, discusses how satellite, wireless data, and leased lines are used as part of a networking solution.
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- WAN Technologies: Important Points of Interest, Part 2 of 3
- Jan 6, 2016
- In Part 2 of a three-part series, Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, Academic Edition, reviews popular low-end and mid-grade offerings for Internet access: dial-up, ISDN, DSL, and cable.
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- Measuring Network Complexity
- Dec 30, 2015
- In this chapter from Navigating Network Complexity: Next-generation routing with SDN, service virtualization, and service chaining, the authors begin by examining some methods proposed to measure network complexity, and then consider ordered versus unordered complexity. Finally, they examine several realms of complexity that will lead to practical applications.
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- WAN Technologies: Important Points of Interest, Part 1 of 3
- Dec 29, 2015
- In the first article of a three-part series, Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, Academic Edition, provides an overview of some of the wide area networking (WAN) technologies that network engineers need to know to get that first job in the industry, or to move up in their chosen field.
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- TACACS+ vs. RADIUS: Similarities and Differences
- Dec 8, 2015
- If you're responsible for the security of your organization's network, it's important to examine all the possibilities. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, examines these two long-time AAA favorites, discussing how they protect your network's vital resources.
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- Foundations of Modern Networking: Background and Motivation of Software-Defined Networks (SDN)
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By
William Stallings
- Dec 3, 2015
- This chapter from Foundations of Modern Networking: SDN, NFV, QoE, IoT, and Cloud begins the discussion of software-defined networks (SDNs) by providing some background and motivation for the SDN approach.
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- Network Address Translation (NAT) Implementation Methods
- Dec 1, 2015
- Have you ever adjusted to a new area code or ZIP code? Everyone needs unique phone numbers and addresses, which is a struggle for the phone companies and the post office. The Internet has the same growing pains on a planetary scale, with everyone's Net-connected devices needing unique IP addresses. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, explains how Network Address Translation makes it possible for all of us and our gadgets to communicate.
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- Inner Workings of the Domain Name System (DNS)
- Nov 24, 2015
- When you type an address into a browser and hit Enter, you expect to arrive at the intended website. Without the Domain Name System (DNS), that wouldn't happen. Whether simple or very complex, networks worldwide rely on the DNS to connect client and target. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, explains how DNS connects one person or server with another, and why you need to know about this undervalued service.
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- Five (or Six) Things That Will Make You a DHCP Wizard
- Nov 17, 2015
- You're probably using the Dynamic Host Configuration Protocol (DHCP) right now, as you read this article. Surprised? Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, explains what you need to know about the use of DHCP in modern communications.
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- Network Routing Protocols and Methods, Part 2
- Nov 10, 2015
- In the conclusion of this series, Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, explains how to untangle the detailed network information provided by two popular network routing protocols.
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- Network Routing Protocols and Methods, Part 1
- Nov 3, 2015
- In this two-part series, Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses current network routing protocols and methods for implementing them. This article covers the types of static versus dynamic routing protocols and the differences between them.
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- Common Protocols for Virtual Private Networks (VPNs)
- Oct 22, 2015
- Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses some of the protocols used on modern virtual private networks.
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- Routers and Switches and Hubs, Oh My! An Introduction to Network Devices and Their Functions
- Oct 12, 2015
- Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses some of the most common network devices that network engineers need to know and understand.
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- Basic Layer 3 Routing Concepts
- Oct 6, 2015
- How does a message get from point A to point B on a network? Though the question may seem simple, the process isn't. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses how basic packet routing works.
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- Mitigation Technologies for E-mail-Based and Web-Based Threats
- Sep 29, 2015
- This chapter from CCNA Security 210-260 Official Cert Guide covers the Cisco E-mail Security Appliances (ESA) and the Cisco Web Security Appliance (WSA) technologies and solutions in detail. You will learn mitigation technologies such as spam and antimalware filtering, data loss prevention (DLP), blacklisting, e-mail encryption, and web application filtering.
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- Five Crucial Commands for Verifying Cisco Switch Network Status and Operational State
- Aug 11, 2015
- A network engineer needs to be conscious of the state of the network and every device connected to it. But when your network consists of multiple devices connected at a distance, how can you test connections and keep on top of network performance? Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses five basic commands you need to know and use correctly to maintain your Cisco network.
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- Nine Switch Commands Every Cisco Network Engineer Needs to Know
- Aug 4, 2015
- Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, provides a quick overview of nine commands that are essential for working with Cisco networks, whether or not your goal is certification.
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- Network Switching Methods: Store-and-Forward Versus Cut-Through
- Jul 28, 2015
- Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, believes every network engineer should understand the differences between the two major switching methods employed in computer networks. This overview discusses the two methods from their initial deployments to modern usage.
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- Packet Switching Methods on Cisco Networks
- Jul 14, 2015
- Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, teaches new networking students the basics they need to know about packet switching on Cisco networks. Experienced network engineers will find this article a useful refresher course on Cisco technology.
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