Wireless Network Essentials: APs, WLCs, and Core Concepts

Chapter 7: Wireless LAN Fundamentals

802.11 Architecture and Operations

1. What are the main planes in a WLAN architecture?

• A) Management
• B) Control
• C) Data

2. Which plane handles signaling and coordination?

• A) Control

3. Which plane handles configuration and monitoring?

• B) Management

4. Which mechanisms are used for channel access in 802.11?

• A) CCA (Clear Channel Assessment)
• D) VCS (Virtual Carrier Sense)

5. What is the shortest interframe space in 802.11?

• C) SIFS (Short Interframe Space)

6. How many address fields are typically in an 802.11 frame?

• D) 4

7. What type of frame is sent by an AP in response to a client's probe request?

• A) Probe Response

8. What is used to derive the encryption keys in WEP?

• D) The WEP passphrase

9. What type of scanning involves listening for beacon frames?

• A) Passive

10. What type of scanning involves sending probe requests?

• D) Active

11. A client sends deauthentication frames.

True

12. A client that disassociates immediately stops all communication.

False

Chapter 8: Wireless Technologies and Standards

Diverse Wireless Communication Methods

1. Which organization sets standards for telecommunications in Europe?

• A) ETSI (European Telecommunications Standards Institute)

2. Which standard is commonly used for cordless phones in North America?

• C) DECT 6.0

3. Bluetooth is primarily used for what type of network?

• D) Personal Area Network (PAN)

4. How many devices can typically be connected in a Bluetooth piconet?

• D) Eight

5. What frequency band does Bluetooth operate in?

• A) 2.4 GHz

6. Which Bluetooth version introduced Enhanced Data Rate (EDR)?

• B) Bluetooth 2.1 + EDR

7. Which organization manages Bluetooth standards?

• B) Bluetooth SIG (Special Interest Group)

8. Common applications for Zigbee include:

• A) Home Automation
• B) Monitoring
• D) Control Systems

9. What frequency band does Zigbee primarily operate in?

• A) 2.4 GHz

10. WiMAX is based on 802.11 standards.

False

11. What is a primary application for WiMAX?

• A) Last-Mile Access

12. Which WiMAX standard supports mobility?

• B) 802.16e

13. What is the typical maximum throughput for 802.16d (fixed WiMAX)?

• A) 40 Mbps

14. What is the typical maximum throughput for 802.16e (mobile WiMAX)?

• A) 30 to 40 Mbps

15. Which of these can cause interference for wireless signals?

• A) Microwave
• B) Fluorescent Lighting

Chapter 9: VLANs and Lightweight AP Protocol (LWAPP)

Network Segmentation and AP Communication

1. Which protocol maps IP addresses to MAC addresses?

• A) ARP (Address Resolution Protocol)

2. What device is responsible for routing traffic between different VLANs?

• D) Gateway Router

3. How many different types of LWAPP messages are there?

• D) 4

4. What protocol is used for communication between a Lightweight AP and a Wireless LAN Controller?

• D) LWAPP (Lightweight Access Point Protocol)

5. What are characteristics of a VLAN?

• A) Logical Broadcast Domain
• B) Transparent Network (to end devices)

6. Clients are aware of the VLANs they are connected to.

False

7. What is the default VLAN ID on most switches?

• D) 1

8. Trunk ports are used for what purpose?

• C) Connections between network devices (e.g., switches, WLCs)

9. Which Cisco IOS command configures VLAN 7 and exits configuration mode?

• C) config vlan 7
end

10. Which Cisco IOS command configures an interface as a trunk port?

• A) switchport mode trunk

11. Which Cisco IOS command sets the native VLAN to 1 on a trunk port?

• D) switchport trunk native vlan 1

12. Which Cisco IOS command sequence configures interface fa0/3 as an access port in VLAN 25?

• C) config t
int fa0/3
switchport mode access
switchport access vlan 25

Chapter 10: Lightweight APs and Wireless LAN Controllers

Cisco WLC and AP Operations

1. What type of AP requires a controller for full functionality?

• A) Lightweight AP

2. Which Cisco solution provides centralized authentication, authorization, and accounting?

• D) ACS (Access Control Server)

3. What is a common maximum number of APs supported by a mid-range Cisco WLC?

• C) Up to 300 (e.g., Cisco 5508 WLC)

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

• B) LWAPP (Lightweight Access Point Protocol)

5. Which stages are part of the client connection process to a WLAN?

• A) Association
• B) Reassociation (when roaming)
• C) The Authentication Process

6. What are some functions of a Lightweight AP?

• A) Buffer and transmit frames
• C) Send responses to probe requests
• D) Forward notifications of events

7. How many WLANs can a Cisco WLC typically support per radio?

• C) 16

8. How many different types of AP modes are there in Cisco WLCs?

• A) 5 (e.g., Local, Monitor, Rogue Detector, Sniffer, FlexConnect)

9. Which Cisco AP models are considered older "A/G" series?

• A) 1130AG
• B) 1240AG

10. Which Cisco AP series introduced 802.11n support?

• A) 1250 Series AP

11. Where are FlexConnect APs typically deployed?

• B) At the remote edge (e.g., branch offices)

12. What is the maximum number of FlexConnect groups on a WLC?

• B) 100

13. An AP must run in FlexConnect mode to support local switching.

True

14. Which Cisco switch series can integrate a WLC module?

• C) Catalyst 3750 Series (with WLC module)

15. What is a common maximum number of APs supported by a mid-range Cisco WLC?

• C) 300 (e.g., Cisco 5508 WLC)

16. Which Cisco router series can host a WLC module?

• D) 7200 Series

17. What Cisco device provides real-time location tracking for wireless clients and assets?

• C) Location Appliance (e.g., Cisco MSE)

Chapter 11: LWAPP Modes and WLC Discovery

AP-WLC Communication and Redundancy

1. What are the two main modes for LWAPP communication?

• A) Layer 2 LWAPP
• B) Layer 3 LWAPP

2. Which LWAPP mode requires the AP and WLC to be on the same subnet?

Layer 2 LWAPP

3. What is a prerequisite for Layer 3 LWAPP?

• A) IP connectivity must be established between the AP and WLC.

4. What was the previous name for FlexConnect mode?

• D) Hybrid-REAP (Remote Edge AP)

5. What is a common deployment scenario for Layer 3 LWAPP?

• C) AP and WLC on different subnets

6. What is the purpose of the AP discovery process?

• B) To deliver a list of available WLCs to the AP.

7. Which WLC interface is used for AP management?

• B) Management Interface (Controller Interface)

8. What happens when an AP successfully joins a WLC?

• D) The AP is primed with configuration.

9. In a mobility group, which controller is responsible for managing client roaming?

• A) Master Controller (or Mobility Anchor Controller)

10. Where does the AP store its running configuration?

• A) RAM

11. How many primary WLCs can an AP be configured to join?

• A) 1

12. What is a common redundancy model for WLCs?

• C) N+N+1

13. What is the default operating mode for a Cisco AP?

• A) Local Mode

14. Which command configures advanced 802.11b monitoring channels?

• C) config advanced 802.11b monitor channel <channel_list>

Chapter 12: Mobility and Roaming

Seamless Client Connectivity

1. What is a mobility group?

• C) A group of controllers configured to share client context.

2. What is the larger concept encompassing multiple mobility groups?

• D) Mobility Domain

3. How many mobility groups can a WLC belong to?

• A) One

4. Clients can roam seamlessly between APs managed by controllers in the same mobility group.

True

5. Clients can roam seamlessly between APs managed by controllers in two different mobility groups without an anchor.

False

6. What are the two main types of client roaming?

• A) Layer 2 Roaming
• C) Layer 3 Roaming

7. What information is exchanged between controllers during roaming?

• D) Client context, SSID (WLAN) details

8. What type of roaming occurs when a client moves between APs managed by the same controller?

• C) Intracontroller Roaming

9. What type of roaming occurs when a client moves between APs managed by different controllers within the same mobility group?

• B) Intercontroller Roaming

10. What type of tunneling is used when the anchor controller tunnels all client traffic?

• A) Symmetric Tunneling

11. What type of tunneling is used when the client traffic is forwarded directly to the network after initial association?

• B) Asymmetric Tunneling

Chapter 13: WLC Interfaces, Configuration, and Monitoring

Managing and Securing Your Wireless Network

1. Which statement is true about a WLC management interface?

• B) It is a logical interface used for management.

2. Which command configures a static route on a WLC?

• D) config route

3. What type of interface is used for out-of-band management on a WLC?

• A) Service Port

4. What is a WLAN group?

• A) A group of APs that broadcast a specific set of WLANs.

5. What does the "Esc" key typically do in a CLI?

• D) Exits current mode or cancels a command.

6. What is the default username for a new Cisco WLC?

• A) Cisco

7. Which command saves the running configuration on a WLC?

• C) save config

8. What is a common default IP address for a home router or AP?

• D) 192.168.1.1

9. Which utility is used to test network connectivity?

• D) PING

10. What is a common naming convention for a new controller interface?

Cont-Int-New (e.g., Controller-Interface-New)

11. What are two essential parameters when creating a new WLAN on a WLC?

• A) Name
• B) SSID (Service Set Identifier)

12. What does it mean if a WLAN is configured for "all APs"?

• B) The WLAN supports all APs joined to the WLC.

13. What does the "Admin Status" of a WLAN control?

• C) Whether the WLAN is enabled or disabled on the radio.

14. Which WLC menu provides an overview of detected rogue APs?

• D) Rogue Summary

15. What information can be viewed from the WLC dashboard?

• A) Software Version
• B) Internal Temperature
• D) System Name

16. What is a recommended threshold for CPU utilization on a WLC?

• C) 25% of the maximum (as a general healthy guideline)

17. How does a WLC detect a rogue AP?

• A) A probe request or beacon frame from an unknown AP is seen.

18. How many different types of rogue AP classifications are there?

• C) 3 (e.g., Friendly, Malicious, External)

19. What does an 802.11 authentication failure indicate?

• C) The client has failed 802.11 authentication.

Chapter 14: Standalone APs and WLC Discovery Methods

AP Deployment and Controller Integration

1. A standalone AP typically has a console port.

True

2. How can an AP obtain an IP address?

• A) DHCP
• B) Static configuration through CLI

3. How can you manage a standalone AP remotely?

• B) Telnet
• C) Web GUI
• D) SSH (Secure Shell)

4. What methods can an AP use to discover a WLC?

• A) DHCP Server (Option 43)
• B) CDP (Cisco Discovery Protocol)
• D) IP Setup Utility (Manual Configuration)

5. You can apply an SSID to a specific radio on a WLC.

False

6. Authentication server configuration is done on the AP itself in a WLC deployment.

False

7. What can an AP download from a TFTP server?

• A) An upgrade image
• D) A WLC (configuration file for WLC discovery)

8. What type of image does an AP download from a WLC during the discovery process?

• D) Auto Lightweight Mode Image

9. What protocol is commonly used for AP image upgrades?

TFTP (Trivial File Transfer Protocol)

10. The controller must be reachable for the AP to function in lightweight mode.

True