[TCP/IP] 10장 연습문제 - 객관식

1 : The main problem that must be solved in providing mobile communication using the IP protocol is ____________.

a. connecting

b. forwarding

c. addressing

d. None of the choices are correct

 

2 : The original IP addressing was based on the assumption that a host is ________.

a. stationary

b. mobile

c. moving

d. None of the choices are correct

 

3 : The IP addresses are designed to work with ________ hosts because part of the address defines the network to which the host is attached.

a. stationary

b. mobile

c. moving

d. None of the choices are correct

 

4 : A mobile host normally uses two addresses. The host has its original address, called the _______ address and a temporary address, called the _________address.

a. care-of; home

b. home; care-of

c. home; foreigner

d. None of the choices are correct

 

5 : When the mobile host acts as a foreign agent, the care-of address is called a _______ care-of address.

a. common

b. shared

c. co-located

d. None of the choices are correct

 

6 : To communicate with a remote host, a mobile host goes through ________ phases.

a. three

b. two

c. four

d. None of the choices are correct

 

7 : The first phase in mobile communication is called _________.

a. registration

b. agent discovery

c. data transfer

d. None of the choices are correct

 

8 : The second phase in mobile communication is called _________.

a. registration

b. agent discovery

c. data transfer

d. None of the choices are correct

 

9 : The third phase in mobile communication is called _________.

a. registration

b. agent discovery

c. data transfer

d. None of the choices are correct

 

10 : Mobile IP uses the router advertisement packet of _______ and appends an agent advertisement message.

a. IGMP

b. IP

c. ICMP

d. None of the choices are correct

 

11 : A registration request or reply is sent by ________ using the well-known port 434.

a. TCP

b. IP

c. UDP

d. None of the choices are correct

 

12 : _________ occurs when a remote host communicates with a mobile host that has moved to the same network (or site) as the remote host.

a. Triple crossing

b. Double crossing

c. Triangle routing

d. None of the choices are correct

 

13 : _______ occurs when the remote host communicates with a mobile host that is not attached to the same network (or site) as the mobile host.

a. Triple crossing

b. Double crossing

c. Triangle routing

d. None of the choices are correct

 

14 : In the _______ phase, a mobile host must learn the address of its home agent.

a. agent discovery

b. registration

c. data transfer

d. None of the choices are correct

 

15 : In the _______ phase, a mobile host must learn the address of its foreign agent.

a. agent discovery

b. registration

c. data transfer

d. None of the choices are correct

 

16 : If a router acts as an agent, it advertises its presence in a network by appending an agent _______ message to an ICMP router advertisement.

a. solicitation

b. advertisement

c. discovery

d. None of the choices are correct

 

17 : A mobile host can send an agent _______ message if it has not received any agent advertisements.

a. solicitation

b. discovery

c. registration

d. None of the choices are correct

 

18 : When a mobile host wants to register with its foreign agent, it sends _______ message.

a. an agent solicitation

b. an agent advertisement

c. a registration request

d. None of the choices are correct

 

19 : The registration reply is sent by the _______ agent to the foreign agent.

a. home

b. care-of

c. discovery

d. None of the choices are correct

 

20 : The _______ uses a registry table to find the care-of address of the mobile host.

a. home agent

b. foreign agent

c. remote host

d. None of the choices are correct