CCNA Wireless Official Exam Certification Guide part 20 potx

162 CCNA Wireless Official Exam Certification GuideExam Preparation Tasks Review All the Key Concepts Review the most important topics from this chapter, noted with the Key Topics icon i

162 CCNA Wireless Official Exam Certification Guide

Exam Preparation Tasks

Review All the Key Concepts

Review the most important topics from this chapter, noted with the Key Topics icon in the outer margin of the page Table 9-5 lists a reference of these key topics and the page num-ber where you can find each one

Complete the Tables and Lists from Memory

Print a copy of Appendix B, “Memory Tables,” (found on the CD) or at least the section for this chapter, and complete the tables and lists from memory Appendix C, “Memory Tables Answer Key,” also on the CD, includes completed tables and lists to check your work

Table 9-5 Key Topics for Chapter 9

Figure 9-6 WLC forwarding the ARP toward the gateway 151

Figure 9-8 WLC receives ARP reply from GW and

con-verts it to LWAPP

153

Chapter 9: Delivering Packets from the Wireless to Wired Network 163

Table 9-6 Chapter 9 Command Reference

switchport mode access Configures a port as an access port

switchport access vlanvlan-id Assigns a VLAN to a port

switchport mode trunk Enables a port to act as a trunk port

switchport trunk native vlanvlan-id Sets the native VLAN on a trunk

show interface status Verifies VLAN assignments

show interface trunk Verifies trunk configurations

Definition of Key Terms

Define the following key terms from this chapter, and check your answers in the Glossary:

lightweight AP, WLC, ARP, SA, TA, RA, DA, LWAPP, VLAN, access port, trunk port, 802.1Q, native VLAN

Command Reference to Check Your Memory

This section includes the most important configuration and EXEC commands covered in this chapter To check to see how well you have memorized the commands as a side effect

of your other studies, cover the left side of Table 9-6 with a piece of paper, read the de-scriptions on the right side, and see whether you remember the command

End Notes

1Configuring VLANs, http://tinyurl.com/588kw9

Cisco Published 640-721 IUWNE Exam Topics Covered in This Part

Install a basic Cisco wireless LAN

■ Describe the basics of the Cisco Unified Wireless Network architecture (Split MAC, LWAPP, stand-alone AP versus controller-based AP, specific hardware examples)

■ Describe the Cisco Mobility Express Wireless architecture (Smart Business Communication System — SBCS, Cisco Config Agent — CCA, 526WLC, 521AP -stand-alone and controller-based)

■ Describe the modes of controller-based AP deployment (local, monitor, HREAP, sniffer, rogue detector, bridge)

■ Describe controller-based AP discovery and association (OTAP, DHCP, DNS, Master-Controller, Primary-Secondary-Tertiary, n+1 redundancy)

■ Describe roaming (Layer 2 and Layer 3, intra-controller and inter-controller, mobility groups)

■ Configure a WLAN controller and access points WLC: ports, interfaces, WLANs, NTP, CLI and Web UI, CLI wizard, LAG AP: Channel, Power

■ Configure the basics of a stand-alone access point (no lab) (Express setup, basic security)

■ Describe RRM

Install Wireless Clients

■ Describe client OS WLAN configuration (Windows, Apple, and Linux.)

■ Install Cisco ADU

■ Describe basic CSSC

■ Describe CCX versions 1 through 5

Chapter 10 Cisco Wireless Networks Architecture Chapter 11 Controller Discovery and Association Chapter 12 Adding Mobility with Roaming

Chapter 13 Simple Network Configuration and Monitoring with the

Cisco Controller Chapter 14 Migrating Standalone APs to LWAPP Chapter 15 Cisco Mobility Express

Chapter 16 Wireless Clients Part II: Cisco Wireless LANs

This chapter covers the following subjects:

The Need for Centralized Control: Briefly dis-cusses the need for centralized control in a wireless deployment

The Cisco Solution: Looks at the Cisco Unified Wireless Network

The CUWN Architecture: Covers the devices in a Cisco Unified Wireless Network

CHAPTER 10

Cisco Wireless Networks Architecture

Table 10-1 “Do I Know This Already?” Section-to-Question Mapping

Foundation Topics Section Questions

In the past, wireless networks were deployed on an AP-by-AP basis, and the configuration for each AP was stored on the AP itself Management solutions existed, but all in all this is not a scalable solution The Cisco Unified Wireless Solution involves an AP that is man-aged by a controller device The controller devices can manage multiple APs The AP con-figuration is performed on the controller, and each AP added to the network gets its configuration from a controller This makes it a more viable solution for large enterprise networks

You should do the “Do I Know This Already?” quiz first If you score 80 percent or higher, you might want to skip to the section “Exam Preparation Tasks.” If you score below 80 percent, you should review the entire chapter Refer to Appendix A, “Answers to the ‘Do I Know This Already?’ Quizzes,” to confirm your answers

“Do I Know This Already?” Quiz

The “Do I Know This Already?” quiz helps you determine your level of knowledge of this chapter’s topics before you begin Table 10-1 details the major topics discussed in this chapter and their corresponding quiz questions

1. What kind of AP does a controller manage?

a. Lightweight AP

b. Managed AP

c. LDAP AP

d. Autonomous AP

168 CCNA Wireless Official Exam Certification Guide

2. Which of the following is not a functional area of the Cisco Unified Wireless Net-work?

a. AP

b. Controller

c. Client

d. ACS

3. Of all the Cisco Wireless LAN Controllers, what is the greatest number of APs you can support?

a. Up to 50

b. Up to 150

c. Up to 300

d. Up to 30,000

4. What protocol is used for communication between an AP and a WLC?

a. STP

b. LWAPP

c. LDAP

d. TCP

5. Which of the following functions does the controller handle? (Choose all that apply.)

a. Association

b. Reassociation when you have clients that are roaming

c. The authentication process

d. Frame exchange and the handshake between the clients

6. Which of the following functions does the AP handle? (Choose all that apply.)

a. Buffer and transmit the frames for clients that are in power-save mode

b. Frame bridging

c. Send responses to probe requests from different clients on the network

d. Forward notifications of received probe requests to the controller

7. How many VLANs does an AP typically handle?

a. 13

b. 15

c. 16

d. 512

Chapter 10: Cisco Wireless Networks Architecture 169

8. How many elements comprise the CUWN architecture?

a. 5

b. 10

c. 15

d. 20

9. Which of the following APs support 802.11a/b and g? (Choose all that apply.)

a. 1130AG

b. 1240AG

c. 1300 series

d. 1400 series

10. Which AP supports the 802.11n draft version 2.0?

a. 1250 series AP

b. 1240 AG

c. 1300 series

d. 1130 AG

11. When an AP operates in H-REAP mode, where would it be seen?

a. In a campus

b. At the remote edge of a WAN

c. In the data center

d. Bridging site-to-site

12. The 4400 series WLC, model AIR-WLC4404-100-K9, can support up to how many APs?

a. 50

b. 100

c. 300

d. 600

13. True or false: An AP must run the same version of code as the controller

a. True

b. False

14. What type of device is the 3750G series Wireless LAN Controller integrated into?

a. A router as a module

b. A router as part of the code

c. A 3750 series switch

d. It’s a blade for the 6500 series

170 CCNA Wireless Official Exam Certification Guide

15. How many APs can the Cisco WiSM manage?

a. 100

b. 150

c. 300

d. 600

16. How many lightweight APs can you have in a mobility domain?

a. 512

b. 1024

c. 3068

d. 7200

17. With wireless network management, what device is used to track more than one device at a time?

a. WCS

b. WCS navigator

c. Location appliance

d. Rogue AP detector

Chapter 10: Cisco Wireless Networks Architecture 171

Network Management

Network Services

Network Unification

CUWN Functional Areas

Access Points

Wireless Clients

Figure 10-1 Quick Look at the CUWN

Foundation Topics

The Need for Centralized Control

There is certainly a need for centralized control in wireless deployments today Initial wireless deployments were based on standalone access points called autonomous access

or fat APs An autonomous AP is one that does not rely on a central control device

Al-though this is a great start, the problem lies in scalability Eventually, you will have prob-lems keeping your configurations consistent, monitoring the state of each AP, and actually taking action when a change occurs You end up with holes in your coverage area, and there is no real dynamic method to recover from that There is certainly a need for central-ized control, and the Cisco Unified Wireless Network (CUWN) is based on centralcentral-ized control

Eventually you will want or need to convert those standalone APs, if possible, to light-weight APs A lightlight-weight AP is managed with a controller

Traditionally after a site survey, you would deploy your wireless network based on the in-formation you gathered As time passes, the environment you did the original site survey

in will change These changes, although sometimes subtle, will affect the wireless cover-age The CUWN addresses these issues

An AP operating in lightweight mode gets its configuration from the controller This means that you will perform most of your configuration directly on the controller It dy-namically updates the AP as the environment changes This also allows all the APs to share

a common configuration, increasing the uniformity of your wireless network and eliminat-ing inconsistencies in your AP configurations

The Cisco Solution

The CUWN solution is based on a centralized control model Figure 10-1 illustrates the numerous components of the CUWN

As you can see, five functional areas exist:

■ Wireless clients