GATE Networks 4

Question 1

Which of the following correctly describes a full-duplex communication channel?

Accepted Answer

Data flows in both directions simultaneously

Answer

Full-duplex allows simultaneous bidirectional data transmission, as opposed to half-duplex which requires turn-taking.

Question 2

The maximum window size in TCP using a 16-bit window field (without scaling) is:

Accepted Answer

65,535 bytes

Answer

The 16-bit window field can represent values from 0 to 2^16 - 1 = 65,535 bytes.

Question 3

In a network where a router has the routing table entry '192.168.10.0/24 via 10.0.0.1', what does '10.0.0.1' represent?

Accepted Answer

The next-hop router

Answer

In a routing table, 'via X.X.X.X' denotes the next-hop IP address — the address of the next router toward the destination.

Question 4

The CRC polynomial x^3 + x + 1 is applied to the message 1011. What is the degree of the remainder after division?

Accepted Answer

At most degree 2

Answer

The remainder from dividing by a degree-r polynomial has degree at most r-1; here r=3, so remainder degree ≤ 2.

Question 5

Which of the following is NOT a characteristic of UDP?

Accepted Answer

Guaranteed in-order delivery

Answer

UDP is connectionless and does not guarantee ordered or reliable delivery; guaranteed in-order delivery is a TCP feature.

(GATE) Graduate Aptitude Test in Engineering Practice Test