Wireless Topic 3 - Adding Mobility With Roaming

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| By Catherine Halcomb
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Catherine Halcomb
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Quizzes Created: 1428 | Total Attempts: 5,897,934
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Wireless Quizzes & Trivia

It’s very easy to take modern technology for granted, but the ability to cast video from your phone to your television was completely unheard of not long ago. How much do you really know about wireless technology? Test yourself now!


Questions and Answers
  • 1. 

    Which of the following describes a mobility group?
    1. a. A set of users with rights to roam
    2. b. A group of controllers configured with the same hostname
    3. c. A group of controllers configured in the same mobility group
    4. d. A set of controllers that roam

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    C. Option 3
    Explanation
    A mobility group refers to a group of controllers that are configured in the same mobility group. This means that these controllers are configured to share information and work together to provide seamless roaming for wireless clients. By being in the same mobility group, the controllers can share client information and maintain connectivity as clients move between access points controlled by different controllers within the group. This allows for a smooth handoff of clients between access points and ensures uninterrupted wireless connectivity.

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  • 2. 

    Controllers that are aware of each other but that are in different mobility groups aresaid to be in what?
    1. a. Mobility chain
    2. b. Mobility mode
    3. c. Mobility-aware mode
    4. d. Mobility domain

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    D. Option 4
    Explanation
    Controllers that are aware of each other but that are in different mobility groups are said to be in a mobility domain. In a mobility domain, controllers can communicate and exchange information with each other, allowing for seamless handoffs and mobility management for clients moving between different mobility groups. This enables efficient roaming and ensures that clients can maintain connectivity as they move across different areas covered by different controllers.

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  • 3. 

    How many mobility domains can a controller be a member of?
    1. a. One
    2. b. Two
    3. c. Three
    4. d. Four

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Option 1
    Explanation
    A controller can only be a member of one mobility domain. This means that it can only be responsible for managing and controlling devices within a single mobility domain, rather than multiple domains simultaneously.

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  • 4. 

    True or false: A client can roam from one mobility group to another in the same mo-bility domain.
    • a. True
    • b. False

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    A client can roam from one mobility group to another in the same mobility domain. This means that a client device can move between different groups within the same network domain without losing connectivity or experiencing interruptions in service. This allows for seamless roaming and ensures that clients can maintain a stable connection as they move throughout the network.

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  • 5. 

    True or false: A client can roam between two controllers in different mobility do-mains.
    • a. True
    • b. False

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    A client cannot roam between two controllers in different mobility domains. Roaming refers to the ability of a client device to maintain network connectivity as it moves between different access points or controllers within the same mobility domain. If the controllers are in different mobility domains, the client would need to re-authenticate and establish a new connection with the new controller, which is not considered roaming. Therefore, the statement is false.

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  • 6. 

    True or false: A client can roam between two controllers in different mobility do-mains.
    • a. True
    • b. False

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    A client cannot roam between two controllers in different mobility domains. Roaming refers to the ability of a client device to maintain a network connection as it moves from one access point to another within the same network. Mobility domains are separate networks with different controller configurations, and clients cannot seamlessly roam between them. Therefore, the statement is false.

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  • 7. 

    Which of the following are valid roaming types? (Choose two.)
    1. a. Layer 2 roaming
    2. b. Seamless AP roaming
    3. c. Layer 3 roaming
    4. d. Layer 4 roaming

    • A.

      Option1

    • B.

      Option2

    • C.

      Option3

    • D.

      Option4

    Correct Answer(s)
    A. Option1
    C. Option3
    Explanation
    Layer 2 roaming and Layer 3 roaming are valid roaming types. Layer 2 roaming refers to the ability to maintain a network connection while moving between access points within the same subnet. Layer 3 roaming, on the other hand, allows a device to maintain its network connection while moving between different subnets or networks. Layer 4 roaming and Seamless AP roaming are not valid roaming types.

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  • 8. 

    Which of the following statements is not true?
    1. a. For roaming to work, the controllers need to be in the same mobility domain.
    2. b. For roaming to work, the controllers need to run the same code version.
    3. c. For roaming to work, the controllers need to operate in the same LWAPP mode.
    4. d. For roaming to work, the SSID (WLAN) does not necessarily need to be the
    5. same.

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    D. Option 4
    Explanation
    Roaming refers to the ability of a wireless device to maintain its connection as it moves between different access points. In order for roaming to work, the controllers need to be in the same mobility domain (option a), they need to run the same code version (option b), and they need to operate in the same LWAPP mode (option c). The SSID (WLAN) does not necessarily need to be the same for roaming to work, as long as the controllers are properly configured. Therefore, option d is not true.

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  • 9. 

    What is the term for roaming from one AP to another AP managed by the same con-troller?
    1. a. Same-controller roaming
    2. b. Intercontroller roaming
    3. c. Intracontroller roaming
    4. d. This is not roaming.

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    C. Option 3
    Explanation
    The term for roaming from one AP to another AP managed by the same controller is "intracontroller roaming". This means that the client device can seamlessly switch from one access point to another within the same controller without experiencing any interruption in connectivity. This type of roaming is commonly used in large wireless networks where multiple access points are managed by a centralized controller.

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  • 10. 

    What is the term for roaming from one AP to another AP managed by a different con-troller?
    1. a. Same-controller roaming
    2. b. Intercontroller roaming
    3. c. Intracontroller roaming
    4. d. This is not roaming.

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. Option 2
    Explanation
    The term for roaming from one AP to another AP managed by a different controller is intercontroller roaming. This means that the access points are controlled by different controllers, allowing the user to seamlessly transition between them without losing connectivity.

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  • 11. 

    What is it called when client traffic is tunneled back to the anchor controller beforebeing sent to its destination?
    1. a. Symmetric tunneling
    2. b. Asymmetric tunneling
    3. c. Anchor roaming
    4. d. Layer 2 roaming

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Option 1
    Explanation
    When client traffic is tunneled back to the anchor controller before being sent to its destination, it is called symmetric tunneling. In this type of tunneling, the client's traffic is first sent to the anchor controller, which then forwards it to the intended destination. This approach ensures that all client traffic passes through the anchor controller, allowing for centralized control and management of the traffic flow.

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  • 12. 

    What is it called when client traffic is sent directly to a destination and return trafficgoes to an anchor controller before being sent back to the client on a foreign con-troller?
    1. a. Symmetric tunneling
    2. b. Asymmetric tunneling
    3. c. Anchor roaming
    4. d. Layer 3 roaming

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. Option 2
    Explanation
    This scenario is called asymmetric tunneling. In this case, client traffic is sent directly to a destination, but the return traffic takes a different path and goes to an anchor controller before being sent back to the client on a foreign controller. This method is commonly used in wireless networks to optimize traffic flow and provide seamless roaming for clients.

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  • 13. 

    Which of the following statements is true?
    1. a. For roaming to work, the controllers need to run the same code version.  
    2. b. For roaming to work, the SSID (WLAN) does not necessarily need to be the same      
    3. c. For roaming to work, the controllers need to be in the same mobility domain.  
    4. d. For roaming to work, the controllers need to operate in the same LWAPP mode

    • A.

      Option1

    • B.

      Option2

    • C.

      Option3

    • D.

      Option4

    Correct Answer(s)
    A. Option1
    C. Option3
    D. Option4
    Explanation
    In order for roaming to work, the controllers need to run the same code version (Option 1), be in the same mobility domain (Option 3), and operate in the same LWAPP mode (Option 4). The SSID (WLAN) does not necessarily need to be the same for roaming to work (Option 2).

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  • 14. 

    What must be set for controllers to be considered in the same mobility domain? (Choose all that apply.)
    1. a. Controllers involved must know the AP-Manager interface IP address of the other      
    2. b. Controllers involved must know the virtual interface IP address of the others.      
    3. c. Controllers involved must know the built-in MAC address of the others.    
    4. d. Controllers involved must know the management interface IP address of the others

    • A.

      Option1

    • B.

      Option2

    • C.

      Option3

    • D.

      Option4

    Correct Answer(s)
    C. Option3
    D. Option4
    Explanation
    Controllers must know the built-in MAC address and the management interface IP address of each other in order to be considered in the same mobility domain. This information allows the controllers to communicate and coordinate with each other effectively. The AP-Manager interface IP address and the virtual interface IP address are not required for controllers to be considered in the same mobility domain.

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  • 15. 

     What is the term for roaming from one AP to another AP managed by the same controller?
    1. a. This is not roaming.    
    2. b. Intracontroller roaming    
    3. c. Same-controller roaming
    4. d. Intercontroller roaming

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. Option 2
    Explanation
    Intracontroller roaming refers to the process of moving from one access point (AP) to another AP that is managed by the same controller. This means that the controller is responsible for managing the handoff between APs, allowing the device to seamlessly switch from one AP to another without losing connectivity. This type of roaming is typically used in large-scale wireless networks where multiple APs are deployed and managed by a central controller.

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  • 16. 

    What is the maximum number of controllers you can have in a mobility group?
    1. a. 72    
    2. b. 12    
    3. c. 48    
    4. d. 20    
    5. e. 24 

  • 17. 

    What conditions have to be met for clients to roam seamlessly between APs on differentcontrollers? (Choose all that apply.)Choose at least one answer.
    1. a. Both controllers must be running the same version of IOS.    
    2. b. Both controllers must use unique virtual interface IP addresses.    
    3. c. Both controllers must be running the same ACLs.     
    4. d. Both controllers must use the same LWAPP mode.  
    5. e. Both controllers must be in the same mobility group or mobility domain.
    6. f. Both controllers must support the WLAN that the client is using.

    • A.

      Option1

    • B.

      Option2

    • C.

      Option3

    • D.

      Option4

    • E.

      Option5

    • F.

      Option6

    Correct Answer(s)
    C. Option3
    D. Option4
    E. Option5
    F. Option6
    Explanation
    For clients to roam seamlessly between APs on different controllers, the following conditions must be met:
    - Option3: Both controllers must be running the same ACLs. This ensures that the access control lists are consistent across controllers, allowing clients to maintain their network access permissions during roaming.
    - Option4: Both controllers must use the same LWAPP mode. LWAPP (Lightweight Access Point Protocol) is a protocol used for communication between access points and controllers. Using the same LWAPP mode ensures compatibility and seamless roaming between controllers.
    - Option5: Both controllers must be in the same mobility group or mobility domain. Mobility groups or domains are used to group controllers together for roaming purposes. Having both controllers in the same group or domain allows clients to roam between them without interruption.
    - Option6: Both controllers must support the WLAN that the client is using. The WLAN (Wireless Local Area Network) is the network that the client is connected to. Both controllers must support this specific WLAN for seamless roaming to occur.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 28, 2015
    Quiz Created by
    Catherine Halcomb
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