What is UDP (User Datagram Protocol)?

Difference Between TCP and UDP (with Comparison Chart Apr 13, 2016 TCP/IP Reference | Nmap Network Scanning While TCP/IP familiarity is expected, even the best of us occasionally forget byte offsets for packet header fields and flags. This section provides quick reference diagrams and field descriptions for the IPv4, TCP, UDP, and ICMP protocols. These beautiful diagrams are used by …

Explanation: A UDP header consists of only the Source Port, Destination Port, Length, and Checksum fields. Sequence Number, Acknowledgment Number, and Window Size are TCP header fields. Sequence Number, Acknowledgment Number, and Window Size are TCP header fields.

PC A has a 1500 byte MTU size and 1460 byte MSS size. PC A needs to send 9000 byte of data to PC B. PC B has a 1400 byte MTU(I am not 100%, but I heard MTU size can be changed) size and obviously 1360 byte MSS size. PC A will segment 9000 byte of data into 6 1460 byte and 1 240 byte, then send all How to Find Maximum Size of IP Data Payload that can MTU: Defines the maximum number of bytes for IP packets including IP header, protocol headers such as, TCP or UDP, and data payload.Protocol headers can be combination of different headers. For example: IPSec has TCP or UDP, AH, and ESP headers. MSS: Defines the maximum number of bytes after the protocol headers.In other words, MSS is the maximum size of the data payload.

The UDP Option Area The UDP transport header includes demultiplexing and service identification (port numbers), a checksum, and a field that indicates the UDP datagram length (including UDP header). The UDP Length field is typically redundant with the size of the maximum space available as a transport protocol payload (see also discussion in

In the header there is the IHL (Internet Header Length) field which is 4 bits long and specifies the header length in 32 bit words. The IHL field can hold values from 0 (Binary 0000) to 15 (Binary 1111). So the longest Internet Header (IP header) size can be 15*32 Bits = 480 Bits = 60 Bytes. This is why the header has a maximum size of 60 Bytes. CSC358 AW3 Solution The length field specifies the number of bytes in the UDP segment (header plus data). An explicit length value is needed since the size of the data field may differ from one UDP segment to the next. The length of UDP payload for selected packet is 32 bytes. 40 bytes - 8 bytes = 32 bytes. UDP Communication and MTU/MSS Size - Cisco Community PC A has a 1500 byte MTU size and 1460 byte MSS size. PC A needs to send 9000 byte of data to PC B. PC B has a 1400 byte MTU(I am not 100%, but I heard MTU size can be changed) size and obviously 1360 byte MSS size. PC A will segment 9000 byte of data into 6 1460 byte and 1 240 byte, then send all How to Find Maximum Size of IP Data Payload that can MTU: Defines the maximum number of bytes for IP packets including IP header, protocol headers such as, TCP or UDP, and data payload.Protocol headers can be combination of different headers. For example: IPSec has TCP or UDP, AH, and ESP headers. MSS: Defines the maximum number of bytes after the protocol headers.In other words, MSS is the maximum size of the data payload.