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EXAMEN 11

 

Question 1:

Which OSI Layer is responsible for path determination?

A.   1

B.   2

C.   3

D.   4

 

Question 2:

Which part(s) of an IP address is used by the router for path determination?

A.   Network

B.   Network and client

C.   Network, subnetwork, and host

D.   Network, subnetwork, host, and subnet mask

 

Question 3:

What best describes the difference between a routed protocol versus a routing protocol?

A.   Routed protocols are used between routers to maintain tables while routing protocols are used to carry user data.

B.   Routed protocols use distance vector algorithms while routing protocols use link-state algorithms.

C.   Routed protocols are used to carry user data while routing protocols maintain tables.

D.   Routed protocols use dynamic addressing while routing protocols use static addressing.

 

Question 4:

What is one advantage of dynamic routing?

A.   Takes little network overhead and reduces network overhead traffic

B.   Reduces unauthorized break-ins as security is tight

C.   Adjusts automatically to topology or traffic changes

D.   Requires very little bandwidth to operate efficiently

 

Question 5:

What is one disadvantage of static routing?

A.   Requires a name server on each network

B.   Routing of data stops while routers exchange routing tables

C.   The network administrator must manually update the routing table whenever a topology change occurs

D.   Tends to reveal everything known about an internetwork

 

Question 6:

What is one disadvantage of dynamic routing?

A.   Requires lots of active network administrator management

B.   Can reveal everything known about an internetwork

C.   Must be reconfigured if the network is changed or stations are added

D.   Cannot compensate for network failures so crashes can be a recurring problem

 

Question 7:

What is a network with only one path to a router called?

A.   Static network

B.   Dynamic network

C.   Entity network

D.   Stub network

 

Question 8:

Which metrics are commonly used by routers to evaluate a path?

A.   EMI load, SDLC connections, deterioration rate

B.   Bandwidth, load, reliability

C.   Distance, hub count, SN ratio

D.   Signal count, loss ratio, noise

 

Question 9:

Which metric measures the passage of a data packet through a router?

A.   Exchange

B.   Hop

C.   Transmittal

D.   Signaling

 

Question 10:

Which best describes convergence?

A.   When messages simultaneously reach a router and a collision occurs

B.   When several routers simultaneously route packets along the same path

C.   When all routers in an internetwork have the same knowledge of the structure and topology of the internetwork

D.   When several messages are being sent to the same destination

 

Question 11: *************************************

What do distance vector algorithms require of routers?

A.   Default routes for major internetwork nodes in case of corrupted routing tables

B.   Periodically send its routing table to its neighbors

C.   Fast response times and ample memory

D.   Maintain a full database of internetwork topology information

 

Question 12:

Which routers exchange information when using a distance-vector routing protocol?

A.   All

B.   All in network

C.   All in subnetwork

D.   Only neighbors

 

Question 13: ************************

Which term describes the situation where packets never reach their destination but instead cycle repeatedly through the same group of network nodes?

A.   Split horizon

B.   End to end messaging

C.   Convergence

D.   Routing loop

 

Question 14:

How can the count to infinity problem be prevented?

A.   By using routing loops

B.   By defining a minimum hop count

C.   By increasing router memory

D.   By using hold-down timers

 

Question 15:

Why are hold-down timers useful?

A.   They help prevent a router from immediately using an alternate route that includes the failed route

B.   They force all routers in a segment to synchronize switching operations

C.   They reduce the amount of network traffic during high traffic periods

D.   They provide a mechanism for bypassing failed sections of the network

 

Question 16:

Which routing protocol maintains a complex database of topology information and uses link-state advertisements (LSAs)?

A.   RIP

B.   IGRP

C.   OSPF

D.   EIGRP

 

Question 17: *****************************

Which best describes link-state algorithms?

A.   Enables each router to know the exact topology of the entire participating internetwork.

B.   Requires minimal router CPU utilization.

C.   Determines distance, direction and reliability to any link on the internetwork.

D.   Uses little network overhead and reduces overall traffic.

 

Question 18: ***********************

Which protocol is a link-state routing protocol?

A.   EIGRP

B.   OSPF

C.   RIP

D.   IGRP

 

Question 19:

How are link-state routing updates triggered?

A.   By timers

B.   By topology changes

C.   By protocol changes

D.   By changing the NIC

 

Question 20:

What will happen if routers have different sets of LSAs?

A.   A check sum procedure is initiated and faulty routing tables repaired.

B.   Routes become unreachable because routers disagree about a link.

C.   A comparison is forced and subsequent convergence on a single routing table occurs.

D.   A broadcast message is sent with the master copy of the routing table to all routers.

 

Question 21:

Which protocol is a hybrid routing protocol?

A.   EIGRP

B.   OSPF

C.   RIP

D.   IGRP

 

Question 22:

What does a router use to identify the destination network (LAN) of a packet within an internetwork?

A.   MAC address

B.   Port address

C.   SPX address

D.   Network address   ŕbien

 

Question 23:

Which kind of route is set when the next hop is not explicitly listed in the routing table?

A.   Dynamic

B.   Default

C.   Passive

D.   Incremental

 

Question 24:

Information regarding routes has been received on a router through interface A. Which routing technique will prevent this information from exiting on the router through the same interface A?

A.   Dynamic routing

B.   Split horizon

C.   Static routing

D.   Hold down timers