Mobile IP Flashcards
1
Q
Mobile
A
- user’s point of attachment changes dynamically
- all connections are automatically maintained despite the change
2
Q
Nomadic
A
user’s Internet connection is terminated each time the user moves
-and a new cxn is initiated when user dials back in
(new temp IP addr is assigned)
3
Q
Agent advertisement
A
Mobility agents (foreign agents and home agents) advertise their presence vie Agent Advertisement
mobile nodes recieve these to know whether they’re on their home network or foreign network
4
Q
care-of-address
A
- when a mobile node detects that it has moved to a foreign network, it gets a care-of-address from the foreign network
- foreign agent care of address or co-located care of address
5
Q
foreign agent care of address
A
- provided by foreign agent through its Agent Advertisement messages
- the foreign agent is the endpoint of the tunnel,
- upon receiving tunneled datagrams from the node’s home agent, it de-capsulates them and delivers the inner datagram to the mobile node
6
Q
co-located care of address
A
- acquired by the mobile node as a local IP address through external means
- then mobile node associates with one of its own network interfaces
7
Q
3 required capabilities for mobile IP
A
Discovery, registration, and tunneling
8
Q
multicast groups
A
- each group has its own IP multicast address
- a host can be in multiple groups
-sending host only has to send 1 copy of the packet