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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.
IP TCP and UDP all discard a packet that arrives with a checksum error and do not?
Only TCP will automatically discard a packet with a bad checksum. UDP packets have a checksum field, but it is rarely used, and then only by the application (not UDP itself)
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
Which three fields are used in a UDP segment header?
• checksum • destination port • source port
What is tcpip header and trailer?
An Ethernet frame has a 14 byte header, a data section, and a 4 byte trailer 14 byte header consist of destination address, source address and type The trailer is for CRC (Cyclic redundancy Check) An Ethernet frame can contain an IP and TCP PDU. IP header most important parts consists of (Version,IHL, Total length,Protocol, source and destination address) In details (Version,Header length,Differentiated services field, total Length, Identification, Flags, fragment offset, Time to live, protocol, header checksum, source and destination address). TCP header most important parts consists of (Source port, Destination port and header Length) In details (Source Port, Destination Port, Sequence number, Acknowledgment number, Header length,Flags,Window and check sum). The details of the IP and TCP header have been taken from a Network protocol Analyzer Wireshark on my own pc.
The fields in TCP header that are missing from UDP header?
The sequence number, acknowledge number, and Window fields.
Which field in the IP packet header allows checking for data transmission errors?
time to live
A UDP header contains what fields?
A UDPheader contains four 16-bit fields. They are the source port, destination port, length, and checksum -- in that order.
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
