IPv4 | Internet Protocol version 4 | TechTerms
Understand IPv4 or interner protocol verison 4 datagram header format. All fields explained in detail with examples containing version number, header length, DSCP, datagram length,Identifier, flags, fragmentation offset, time to live, protocol, header checksum, source and destination IP address, and Options. Data or payload contains the transport layer segment.
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Version number specifies the version of datagram – version 4 or version 6. The header length tells the total length of the IPv4 datagram header. The ‘OPTION’ field is variable in length and is rarely used. DSCP classify IP packets. Datagram length tells the total length of the IP datagram. Identifier, flags, and fragmentation offset are used in case of IP fragmentation. Time-to-live field is used to limit the lifetime of an IP datagram. Protocol indicates to which transport layer protocol the data portion of the IP datagram should be passed. Header checksum helps in detecting the bit errors in the received IP datagram’s header. Source and destination IP address represents the IPv4 address of the source host and the destination host, respectively. Data (Payload) contains the segment of the transport layer.
ipv4
