chp3 Flashcards
(31 cards)
What does CN stand for in networking?
CN stands for Correspondent Node
What does MN stand for in networking?
MN stands for Mobile Node
When the CN sends an IP packet to the MN, what does it not know?
The CN doesn’t know about the MN’s current location
What is the destination address in the IP packet sent by CN to MN?
The destination address is MN’s original IP address
What is the source address in the IP packet sent by CN?
The source address is CN’s IP address
Fill in the blank: The CN sends the packet to the IP address of _______.
MN
True or False: The CN knows the current location of the MN when sending an IP packet.
False
What mechanism is used to route the packet to the router responsible for MN’s home network?
The standard routing mechanism of the Internet
What does the HA detect about the MN?
The MN is currently not in its home network.
HA stands for Home Agent, and MN stands for Mobile Node.
What action does the HA take when it detects the MN is outside its home network?
The packet is encapsulated and tunneled to the COA of the MN.
COA stands for Care-of Address.
What is added to the packet when the HA encapsulates it?
A new header indicating MN’s COA as the new destination and HA as the source.
This process is part of mobile IP for managing packet forwarding.
What does FA do after receiving the encapsulated packet?
FA decapsulates the packet and forwards the original packet with CN as source and MN as destination.
FA stands for Foreign Agent and CN stands for Correspondent Node.
What is a Mobile Node (MN)?
An end-system or a router (node) that can change its point of connection to the network without changing its IP address.
Mobile Nodes are often used in mobile computing to maintain connectivity while moving between different networks.
What is a Correspondent Node (CN)?
It is the communication partner for the mobile node. The CN can be fixed or mobile.
The CN plays a crucial role in mobile communication by enabling data exchange with the mobile node.
What is a home network (HN)?
The home network is the subnet to which the MN belongs to with respect to its IP address.
MN refers to Mobile Node in networking contexts.
What is the foreign network (FN)?
The current subnet the MN visits and which is not the home network.
What is the role of a Foreign Agent (FA) in Mobile IP?
The FA is typically a router in the foreign network to which the mobile node is currently attached.
What functions does the Foreign Agent (FA) implement?
The FA implements Mobile IP functions like:
* Providing security services to the mobile node (MN) during its visit to the foreign network (FN)
* Forwarding the datagrams received from the home agent to the MN
* Supporting the sharing of mobility information
True or False: The Foreign Agent provides security services to the mobile node during its visit to the foreign network.
True
Fill in the blank: The FA typically forwards datagrams received from the _______ to the mobile node.
home agent
What is a Home Agent (HA)?
HA is a system in the home network of the MN.
MN stands for Mobile Node.
Where can a Home Agent (HA) be implemented?
HA can be implemented on:
* a router responsible for the home network
* a node in a home subnet.
What does the Home Agent (HA) maintain?
HA maintains a location registry i.e. it is informed of the MN’s location.
Where does the tunnel for packets towards the MN start?
The tunnel for packets towards the MN starts at the HA.
