ccna interview questions and answers

Part - 36 CCNA Interview Questions and Answers

176 Identify 2 transport layer protocols?

A.) IP

B.) TCP

C.) CDP

D.) ARP

E.) UDP

Ans B E

TPC and UDP are 2 layer4 Transport protocols.

177 Identify 2 features of X.25?

A.) Supports only IP

B.) Utilizes switched and permanent virtual circuits

C.) Contains minimal flow control and error recovery

D.) Utilizes LAPB as it's data-link protocol

Ans B D

X.25 utilizes LAPB and uses switched and permanent VC's. It supports multiple layer protocols and is heavy laden with error detection and correction mechanisms.

180 Identify the purpose of the Trace command?

A.) Explorer packet transmitting routing information

B.) Test connectivity

C.) Determine the path a packet is taking through the network

D.) Transmits user data when buffers are full

Ans C

The trace command is used to determine the path a packet has taken through the network.

190 Identify the purpose of the TCP 3 step handshake?

A.) Setup a un-reliable connection

B.) Initialize routing tables

C.) Synchronize sequence numbers between hosts

D.) Connection tear down process

Ans C

The 3 step handshake establishes the parameters required for a TCP connection. During the handshake process sequence numbers are synchronized allowing for the end points to properly acknowledge and re-assemble the segments.