In Go-Back-N window, when the timer of the packet times out, several packets have to be resent even some may have arrived safe. Whereas in Selective Repeat window, the sender resends ___________

• A. Packet which are not lost
• B. Only those packets which are lost or corrupted
• C. Packet from starting
• D. All the packets

Discarding policy is mainly done by _______

• A. Sender
• B. Receiver
• C. Router
• D. Switch

Closed-Loop control mechanisms try to _________

• A. Remove after congestion occurs
• B. Remove after sometime
• C. Prevent before congestion occurs
• D. Prevent before sending packets

The technique in which a congested node stops receiving data from the immediate upstream node or nodes is called as _______

• A. Admission policy
• B. Backpressure
• C. Forward signaling
• D. Backward signaling

Backpressure technique can be applied only to _______

• A. Congestion networks
• B. Closed circuit networks
• C. Open circuit networks
• D. Virtual circuit networks

The packet sent by a node to the source to inform it of congestion is called _______

• A. Explicit
• B. Discard
• C. Choke
• D. Backpressure

In the slow-start algorithm, the size of the congestion window increases __________ until it reaches a threshold.

• A. Exponentially
• B. Additively
• C. Multiplicatively
• D. Suddenly

In the congestion avoidance algorithm, the size of the congestion window increases ____________ until congestion is detected.

• A. Exponentially
• B. Additively
• C. Multiplicatively
• D. Suddenly

IPv6 does not use _________ type of address.

• A. Broadcast
• B. Multicast
• C. Anycast
• D. Unicast

Which among the following features is present in IPv6 but not in IPv4?

• A. Fragmentation
• B. Header checksum
• C. Options
• D. Anycast address