GATE Networks 5

Question 1

The three-way handshake in TCP connection establishment uses which sequence of messages?

Accepted Answer

SYN, SYN-ACK, ACK

Answer

TCP's three-way handshake: client sends SYN, server responds with SYN-ACK, client replies with ACK to establish the connection.

Question 2

Which layer of the TCP/IP model corresponds to both the data link and physical layers of the OSI model?

Accepted Answer

Network access layer

Answer

The TCP/IP network access (link) layer combines the functions of OSI's data link and physical layers.

Question 3

In distance vector routing, the 'count to infinity' problem is caused by:

Accepted Answer

Routers using stale routing information from neighbors that route back through them

Answer

Count to infinity occurs when two routers each believe the other has a valid route to a failed destination, incrementally advertising increasing costs.

Question 4

A leaky bucket algorithm with a bucket size of 10 packets and output rate of 2 packets/second receives a burst of 10 packets instantly. How long until the bucket drains?

Accepted Answer

5 seconds

Answer

At 2 packets/second, draining 10 packets takes 10/2 = 5 seconds.

Question 5

Which switching technique stores the entire frame before forwarding, allowing error checking before transmission?

Accepted Answer

Store-and-forward switching

Answer

Store-and-forward switching buffers the complete frame and performs CRC error checking before forwarding, at the cost of higher latency.

(GATE) Graduate Aptitude Test in Engineering Practice Test

(GATE) Graduate Aptitude Test in Engineering Practice Test

GATE Networks 5