True or False

1. The source port number and destination port number are included in the TCP header only, not in the UDP header.

2. Both UDP and TCP provide error detection service.

3. If a UDP segment has its length field valued 271 bytes, then it contains 263 bytes payload data (application data).

4. TCP applies fast retransmit to a segment when the segment's timer expires.

5. If a receiver get a segment and the checksum it calculated does not match with the checksum field in the segment, then there must be an error in the segment.

6. Over a TCP connection, suppose host A sends two segments to host B, host B sends an acknowledgement (ACK) to A for each segment. The first ACK is lost, but the second ACK arrives before the timer for the first segment expires. Host A will still retransmit the first segment because it does not receive an ACK for it.

7. Suppose host A is sending a large file to host B over a single TCP connection. If the sequence number for a segment of this connection is 100, then the sequence number for the subsequent segment will necessarily be 101.

8. Suppose host A sends host B one segment with sequence number 38 and 4 bytes of data. Then in this same segment the acknowledgement number is necessarily 42.

9. If a TCP segment contains 5 at its rwnd field (receiving window), that means the receiver should not send more than 5 segments at one time for the purpose of congestion control.