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What is a layer four header?
In the commonly used TCP/IP communications, that would either be a TCP header, or a UDP header.In the commonly used TCP/IP communications, that would either be a TCP header, or a UDP header.In the commonly used TCP/IP communications, that would either be a TCP header, or a UDP header.In the commonly used TCP/IP communications, that would either be a TCP header, or a UDP header.
What header that has source of 13357 and destination port of 23?
It is a TCP Header
Why to use tcp header?
a tcp header contains the information of the source and destination networks and well as what port to access with out it the packet would not know where to go
What has port numbers in its header?
both tcp and udp
The fields in TCP header that are missing from UDP header?
The sequence number, acknowledge number, and Window fields.
Why does the TCP use a sequence number in the header?
To reassemble the segments into data.
What is the maximum size of data that the application layer can pass on to the TCP layer below?
2^16 bytes - size of TCP header
Which tcp segment header field controls the termination of a session?
code bits
Why does the TCP header have a header length field and UDP header does not?
in tcp header (32 bits) we have a field that is called options and padding that has variable in length and the header length shows the actual header size i.e size of 20 octets+size of options and padding field and in UDP we dont have any field like that and its header is fixed of 8 OCTETS (32 bits header size) refrence: WIRELESS COMMUNICATIONS AND NETWORKS by William Stallings Second Edition pg 91(see fig)
Why are the source and destination port numbers at the beginning of the TCP header?
That is the way the standard designed the header. They could be placed anywhere as long as everyone understood where in the packet header it was placed.
Compare the TCP header and the UDP header?
Both TCP and UDP have origin and destination ports - and that is about all the similarity there is between the two. TCP has several other fields that UDP doesn't have, including window size; a consecutive byte numbering (to figure out where to place a TCP segment in a data stream); the bytes that the other side is expected to send; and others.
What information is found in both the TCP and UDP header information?
souce and destination ports
