L3 - Computer Networks 1/2

a NAK-free protocol

• rdt2.2
• rdt1.0
• rdt1.1
• rdt2.0

App messages are broken into ____ by the send side, and passed to the network layer

• sockets
• segments
• packets
• bits

In rdt 3.0, the receiver must specify the sequence number of the packet being ACKed

• true
• false

in rdt 3.0, only when the packet gets lost, the timeout will trigger a resubmit of the packet

• true
• false

udt_send() is called by rdt to transfer packet over unreliable channel to receiver

• true
• false

3 properties of reliability are no bits errors, no loss (of packets), in-order delivery (of packets)

• true
• false

A pipelined sender can have transmitted multiple packets for which the sender has yet to receive an ACK from the receiver.

• true
• false

With pipelining, a packet is only retransmitted if that packet, or its ACK, has been lost.

• true
• false

With pipelining, a receiver will have to send fewer acknowledgments as the degree of pipelining increases

• true
• false

When computing the Internet checksum for two numbers, a single flipped bit (i.e., in just one of the two numbers) will always result in a changed checksum.

• true
• false