Chapter 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


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.


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


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.


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


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


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

  1. True

  2. False


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


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


Answer: True.

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

    Similar book on Amazon © 2008-2017.
    If you may any questions please contact us: