Glossary: TCP/IP in Depth, Part 1
IPv4 (Internet Protocol version 4)
Also written: IP, IPv4 header
The version of IP the office mostly uses, with 32-bit addresses such as 192.168.10.20. Its header has twelve fields in 20 bytes, plus any options.
Where the book teaches it
Related terms
IHL (Internet header length)TTL (time to live)header checksumIPv6 (Internet Protocol version 6)