Mobile IP

Question 1

Mobile

Answer 1

• user’s point of attachment changes dynamically

- all connections are automatically maintained despite the change

Question 2

Nomadic

Answer 2

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)

Question 3

Agent advertisement

Answer 3

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

Question 4

care-of-address

Answer 4

• 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

Question 5

foreign agent care of address

Answer 5

• 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

Question 6

co-located care of address

Answer 6

• acquired by the mobile node as a local IP address through external means
• then mobile node associates with one of its own network interfaces

Question 7

3 required capabilities for mobile IP

Answer 7

Discovery, registration, and tunneling

Question 8

multicast groups

Answer 8

• 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