[TCP/IP] 11장 연습문제 - 객관식

1 : For purposes of routing, the Internet is divided into ___________.

a. wide area networks

b. autonomous networks

c. autonomous systems

d. None of the choices are correct

 

2 : Routing inside an autonomous system is referred to as ________ routing.

a. interdomain

b. intradomain

c. out-of-domain

d. None of the choices are correct

 

3 : Routing between autonomous systems is referred to as ______ routing.

a. interdomain routing

b. intradomain routing

c. out-of-domain

d. None of the choices are correct

 

4 : In _______ routing, the least cost route between any two nodes is the route with the minimum distance.

a. path vector

b. distance vector

c. link state

d. None of the choices are correct

 

5 : In ________, each node maintains a vector (table) of minimum distances to every node.

a. path vector

b. distance vector

c. link state

d. None of the choices are correct

 

6 : In distance vector routing, each node periodically shares its routing table with _________ and whenever there is a change.

a. every other node

b. its immediate neighbors

c. one neighbor

d. None of the choices are correct

 

7 : The Routing Information Protocol (RIP) is an intradomain routing based on _________ routing.

a. distance vector

b. link state

c. path vector

d. None of the choices are correct

 

8 : The metric used by _______ is the hop count.

a. OSPF

b. RIP

c. BGP

d. None of the choices are correct

 

9 : In RIP, the ________ timer controls the advertising of regular update messages.

a. garbage collection

b. expiration

c. periodic

d. None of the choices are correct

 

10 : In RIP, the ________ timer is used to purge invalid routes from the table.

a. garbage collection

b. expiration

c. periodic

d. None of the choices are correct

 

11 : In RIP, the ________ timer controls the validity of the route.

a. garbage collection

b. expiration

c. periodic

d. None of the choices are correct

 

12 : RIP uses the services of _______.

a. TCP

b. UDP

c. IP

d. None of the choices are correct

 

13 : The _________ routing uses the Dijkstra algorithm to build a routing table.

a. distance vector

b. link state

c. path vector

d. None of the choices are correct

 

14 : The Open Shortest Path First (OSPF) protocol is an intradomain routing protocol based on _______ routing.

a. distance vector

b. link state

c. path vector

d. None of the choices are correct

 

15 : The _______ protocol allows the administrator to assign a cost, called the metric, to each route.

a. OSPF

b. RIP

c. BGP

d. None of the choices are correct

 

16 : In OSPF, a ________ link connects two routers without any other host or router in between.

a. point-to-point

b. transient

c. stub

d. None of the choices are correct

 

17 : In OSPF, a _______ link is a network with several routers attached to it.

a. point-to-point

b. transient

c. stub

d. None of the choices are correct

 

18 : In OSPF, a ________ link is a network is connected to only one router.

a. point-to-point

b. transient

c. stub

d. None of the choices are correct

 

19 : In OSPF, when the link between two routers is broken, the administration may create a _________ link between them using a longer path that probably goes through several routers.

a. point-to-point

b. transient

c. stub

d. None of the choices are correct

 

20 : In OSPF, a ________ defines the links of a true router.

a. network link

b. router link

c. summary link to network

d. None of the choices are correct

 

21 : In OSPF, a ________ defines the links of a network.

a. network link

b. router link

c. summary link to network

d. None of the choices are correct

 

22 : In OSPF, an area border router advertises a ____________ LSA.

a. network link

b. router link

c. summary link to network

d. None of the choices are correct

 

23 : OSPF uses the _______ message to create neighborhood relationships and to test the reachability of neighbors.

a. link state request

b. database description

c. link state update

d. None of the choices are correct

 

24 : In OSPF, the ________ message does not contain complete database information; it only gives an outline, the title of each line in the database.

a. link state request

b. database description

c. link state update

d. None of the choices are correct

 

25 : In OSPF, a _________ message is sent by a router that needs information about a specific route or routes.

a. link state request

b. database description

c. link state update

d. None of the choices are correct

 

26 : In ________ routing, we assume that there is one node (or more) in each autonomous system that acts on behalf of the entire autonomous system.

a. distant vector

b. path vector

c. link state

d. None of the choices are correct

 

27 : ___________ is an interdomain routing protocol using path vector routing.

a. BGP

b. RIP

c. OSPF

d. None of the choices are correct

 

28 : BGP can have two types of sessions: _______ and ________ sessions.

a. E-BGP; A-BGP

b. I-BGP; C-BGP

c. E-BGP; I-BGP

d. None of the choices are correct

 

29 : To create a neighborhood relationship, a router running BGP sends a(n) ________ message.

a. open

b. update

c. keepalive

d. None of the choices are correct

 

30 : In BGP, the _______ message is used by a router to withdraw destinations that have been advertised previously, or to announce a route to a new destination, or both.

a. open

b. update

c. keepalive

d. None of the choices are correct

 

31 : The routers running the BGP protocols exchange _______ messages regularly to tell each other that they are alive.

a. open

b. update

c. keepalive

d. None of the choices are correct

 

32 : In BGP, a(n) _______ message is sent by a router whenever an error condition is detected or a router wants to close the connection.

a. open

b. update

c. keepalive

d. None of the choices are correct

 

33 : BGP messages are encapsulated in _______.

a. TCP segments

b. UDP user datagrams

c. IP datagrams

d. None of the choices are correct

 

34 : An area is _______.

a. part of an AS

b. composed of at least two ASs

c. another term for an AS

d. None of the choices are correct