6 / 9 UDP

Eight Bytes Total

UDP's header is the whole protocol. Compare it against the minimum TCP header:

UDP carries 8 bytes of header where TCP carries at least 20 UDP, 8 bytes total src port dst port length cksum TCP, 20 bytes minimum src + dst port sequence no. ack no. offset/flags/win cksum + urg each box is drawn to scale, 20 px per byte

A sensor emits a 40 byte reading 1000 times a second as one UDP datagram over IPv4 on an Ethernet link. Count the 14 byte Ethernet header and ignore the preamble and the frame check sequence. What fraction of the transmitted bytes is actual payload?

A

About 42.6 percent

B

About 48.8 percent

C

About 58.8 percent

D

About 83.3 percent