ccna interview questions and answers

Part -49 CCNA Interview Questions and Answers

281 Which layer is responsible for putting 1s and 0s into a logical group?

A.) Session

B.) Application

C.) Transport

D.) Data Link

E.) Physical

F.) Network

Ans D

Frames are broken down into 1s and 0s and placed onto the physical medium by the Data Link layer.

282 How many LMI types are available on Cisco routers?

A.) Four

B.) Two

C.) Five

D.) Three

Ans D

There are three types of LMI standards: ANSI - Annex D defined by ANSI standard T1.617 ITU-T (Q.933A) - Annex A defined by Q933A Cisco (default) - LMI defined by the gang of four

283 Which layer is responsible for framing?

A.) Application

B.) Data Link

C.) Physical

D.) Network

E.) Transport

Ans B

The Data link layer performs the following: Responsible for physically passing data from one node to another. Translates messages from the upper layers into data frames and adds customized headers containing the Hardware destination and source address.

284 What ISDN protocol specifies concepts, terminology, and services?

A.) Q

B.) S

C.) I

D.) E

Ans C

These protocols deal with ISDN issues: E - Specifies ISDN on the existing telephone network. I - Specifies concepts, terminology, and services. Q - Specifies switching and signalling.

285 What is the purpose of Split Horizon?

A.) It prevents the regular update messages from reinstating a route that has gone down

B.) Information received on an interface cannot be sent back out the same interface

C.) Informs all neighbor routers that two routes exist

D.) Tells the router the destination is unreachable

Ans B

Split Horizon - If you learn a protocol’s route on an interface, do not send information about that route back out that interface.

286 WAN stands for which of the following?

A.) Wide Arena Network

B.) World Area Network

C.) Wide Area News

D.) Wide Area Network

Ans D

WAN stands for Wide Area Network

287 Which of the following provide connection-oriented transport to upper layer protocols?

A.) SPX

B.) RIP

C.) NLSP

D.) NCP

Ans A

SPX is similar to TCP in that is provides reliable delivery of packets and provides connection-oriented transport to the upper layer protocols.

288 Which two does 100BaseT use?

A.) CSMA/CD

B.) IEEE 802.5

C.) 802.3u

D.) Switching with 53-byte cells

Ans A C

100BaseT - 100BaseT uses two-pair Category 5 UTP cable with an RJ45 connector and the same pin out as in 10BaseT. 100BaseT supports full duplex operation. 100BaseT is limited to 100 meters distance.

289 Which layer is responsible for flow control, acknowledgement, and windowing?

A.) Transport

B.) Network

C.) Application

D.) Session

E.) Physical

F.) Data Link

Ans A

The Transport layer performs the following: Responsible for end-to-end integrity of data transmission. Handles multiplexing upper-layer application, session establishment and tear down of virtual circuits. Hides details of network dependent info from the higher layers by providing transparent data transfer. The 'windows' works at this level to control how much information is transferred before an acknowledgement is required.

290 Which of the following is used to manage and monitor the network?

A.) SNMP

B.) HTTP

C.) IP

D.) FTP

Ans A

The Simple Network Management Protocol (SNMP) is used to manage and monitor traps.