Chapter 1


1:

You would use a Mobile IP solution, rather than DHCP or a simple WLAN, when you are interested in which of the following?

  1. Nomadic mobility

  2. Intrasubnet mobility

  3. Always-on IP mobility

  4. Stationary IP communication

  5. Link-layer mobility

A1:

Answer: c. Mobile IP allows the user to remain in active communication as the user moves. Thus, the user can maintain TCP/UDP connections while moving, because the home IP address of the Mobile Node does not change. DHCP, on the other hand, is a nomadic solution. The user obtains a new address in the foreign/new network and must close all communication before moving again. WLAN provides mobility within one IP subnet.

2:

What is the difference between nomadicity and mobility in the context of Mobile IP?

A2:

Answer: Nomadicity refers to the ability to move from one location to another and start communications. The user must terminate and restart sessions and applications as a result of the move. By contrast, mobility refers to the ability to move and maintain communication in the process.

3:

What are the four requirements that a mobility solution must address?

A3:

Answer: A mobility solution must address four requirements: location discovery, move detection, update signaling, and path (re)establishment.

4:

Link-layer mobility protocols by themselves are capable of handling interaccess technology handovers.

  1. True

  2. False

A4:

Answer: False. By definition, link-layer mobility is associated only with a specific access link technology.

5:

IP layer mobility allows all IP-enabled applications, whether they use TCP, UDP, or another transport protocol, to seamlessly inherit full mobility across a diverse range of access link types.

  1. True

  2. False

A5:

Answer: True.



    Mobile IP Technology and Applications
    Mobile IP Technology and Applications
    ISBN: 158705132X
    EAN: 2147483647
    Year: 2005
    Pages: 124

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