TCP Segment

Question 1

Destination Port

Answer 1

16-bits. The port of the service traffic is intended for

Question 1

Source Port

Answer 1

16-bits. High numbered port chosen from a special section of ports known as ephemeral ports

Question 2

Sequence Number

Answer 2

32-bit number. Used to keep track of where in a sequence of TCP segments this one is expected to be

Question 3

Acknowledgement Number

Answer 3

32-bits. Number of the next expected segment.

Question 4

Data Offset Field

Answer 4

A 4-bit number that communicates how long the TCP header for this segment is. Makes sure the receiving network understands where the payload begins.

Question 5

Control Flags

Answer 5

6-bits.

Question 6

TCP Window

Answer 6

16-bits. Specifies the range of sequence numbers that might be sent before an acknowledgement may be required. Makes sure data is being received

Question 7

TCP Checksum

Answer 7

16 bits. Checks to make sure data is received properly

Question 8

Urgent Pointer Field

Answer 8

16-bits. Used in conjunction with one of the TCP control flags to point out particular segments that might be more important than others

Question 9

Options field

Answer 9

0-16 bits. Sometimes used for more complicated flow control protocols

Question 10

Padding

Answer 10

16-bits of padding to make sure payload begins where it is expected