Home > Articles > Certification > Cisco Certification > CCENT

CCENT/CCNA ICND1 Exam Guide: Introduction to Wireless LANs

Jul 15, 2008

␡

⎙ Print

Page 1 of 6 Next >

This chapter examines the basic concepts, standards, installation, and security options for some of the most common WLAN technologies today.

This chapter is from the book 

CCENT/CCNA ICND1 Official Exam Certification Guide (CCENT Exam 640-822 and CCNA Exam 640-802), 2nd Edition

Learn More Buy

This chapter covers the following subjects:

Wireless LAN Concepts: This section explains the basic theory behind transmitting data with radio waves using wireless LAN standards.

Deploying WLANs: This section lists a set of generic steps for installing small WLANs, with no product-specific details.

Wireless LAN Security: This section explains the various WLAN security options that have progressed through the years.

So far, this book has dedicated a lot of attention to (wired) Ethernet LANs. Although they are vitally important, another style of LAN, wireless LANs (WLAN), fills a particularly important role in providing network access to end users. In particular, WLANs allow the user to communicate over the network without requiring any cables, enabling mobile devices while removing the expense and effort involved in running cables. This chapter examines the basic concepts, standards, installation, and security options for some of the most common WLAN technologies today.

As a reminder if you're following the optional reading plan listed in the Introduction to this book, you will be moving on to Chapter 1 of the CCNA ICND2 Official Exam Certification Guide following this chapter.

"Do I Know This Already?" Quiz

The "Do I Know This Already?" quiz allows you to assess whether you should read the entire chapter. If you miss no more than one of these nine self-assessment questions, you might want to move ahead to the "Exam Preparation Tasks" section. Table 11-1 lists the major headings in this chapter and the "Do I Know This Already?" quiz questions covering the material in those sections. This helps you assess your knowledge of these specific areas. The answers to the "Do I Know This Already?" quiz appear in Appendix A.

Table 11-1. "Do I Know This Already?" Foundation Topics Section-to-Question Mapping

Foundation Topics Section	Questions
Wireless LAN Concepts	1–4
Deploying WLANs	5–7
Wireless LAN Security	8, 9

Which of the following IEEE wireless LAN standards uses only the U-NII band of frequencies (around 5.4 GHz)?
1. 802.11a
2. 802.11b
3. 802.11g
4. 802.11i
Which of the following answers is the correct maximum speed at which two IEEE WLAN devices can send data with a particular standard?
1. 802.11b, using OFDM, at 54 Mbps
2. 802.11g, using OFDM, at 54 Mbps
3. 802.11a, using DSSS, at 54 Mbps
4. 802.11a, using DSSS, at 11 Mbps
Which of the following lists the nonoverlapping channels when using 802.1b DSSS in the U.S.?
1. 1, 2, 3
2. 1, 5, 9
3. 1, 6, 11
4. a, b, g
5. 22, 33, 44
Which of the following terms refers to a WLAN mode that allows a laptop to roam between different access points?
1. ESS
2. BSS
3. IBSS
4. None of the other answers are correct.
When configuring a wireless access point, which of the following are typical configuration choices?
1. SSID
2. The speed to use
3. The wireless standard to use
4. The size of the desired coverage area
Which of the following is true about an ESS's connections to the wired Ethernet LAN?
1. The AP connects to the Ethernet switch using a crossover cable.
2. The various APs in the same WLAN need to be assigned to the same VLAN by the Ethernet switches.
3. The APs must have an IP address configured to forward traffic.
4. The APs using mixed 802.11g mode must connect via a Fast Ethernet or faster connection to an Ethernet switch.
Which of the following are not common reasons why a newly installed WLAN does not allow a client to connect through the WLAN into the wired infrastructure?
1. The AP is installed on top of a metal filing cabinet.
2. The client is near a fast-food restaurant's microwave oven.
3. The client is sitting on top of a big bundle of currently used Cat5 Ethernet cables.
4. The AP was configured to use DSSS channel 1 instead of the default channel 6, and no one configured the client to use channel 6.
Which of the following WLAN security standards refer to the IEEE standard?
1. WPA
2. WPA2
3. WEP
4. 802.11i
Which of the following security features were not in the original WEP security standard but are now in the WPA2 security standard?
1. Dynamic key exchange
2. Preshared Keys (PSK)
3. 802.1x authentication
4. AES encryption

Page 1 of 6 Next >

🔖 Save To Your Account

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.

Privacy Notice

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

Email Address