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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.
Why does the TCP use a sequence number in the header?
To reassemble the segments into data.
What header that has source of 13357 and destination port of 23?
It is a TCP Header
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.
If the IP header is 20 bytes how big is the TCP segment encapsulated by this header?
The size of a TCP segment encapsulated by an IP header does not have a fixed size and can vary based on the data being transmitted. However, the maximum size of a TCP segment is typically constrained by the Maximum Transmission Unit (MTU) of the network, which is commonly around 1500 bytes for Ethernet. Given that the IP header is 20 bytes, the maximum TCP segment size would be approximately 1480 bytes if there are no additional headers or options. In practice, the exact size would depend on the TCP header size and any options included.
The function of the checksum field in a TCP header?
The checksum field in a TCP header is used to verify the integrity of the TCP segment during transmission. It checks for errors that may have occurred in the data, ensuring that the segment received is the same as the one sent. The checksum is calculated over the TCP header and the data payload, and the receiver recalculates the checksum to confirm its accuracy. If the checksums do not match, the segment is considered corrupted and is typically discarded.
How many bytes in TCP?
TCP (Transmission Control Protocol) uses a variable header size that typically ranges from 20 to 60 bytes. The standard header size is 20 bytes, which includes fields such as source and destination ports, sequence number, acknowledgment number, and control flags. Additional options can extend the header size, but the maximum size for a TCP packet, including the header and data, can be up to 65,535 bytes.
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.
