IP header

In this article, we will further explore IP header, a topic that has captured the attention of academics, experts, and enthusiasts alike. IP header is a topic of great relevance today and its importance extends to various areas, from science and technology to culture and society. Throughout this text, we will analyze the different aspects related to IP header, as well as its impact on the current world. From its origin to its evolution, through its influence in different areas, we will examine this fascinating topic in detail and discover the multiple facets that make it so relevant today.

An IP header is header information at the beginning of an Internet Protocol (IP) packet. An IP packet is the smallest message entity exchanged via the Internet Protocol across an IP network. IP packets consist of a header for addressing and routing, and a payload for user data. The header contains information about IP version, source IP address, destination IP address, time-to-live, etc. The payload of an IP packet is typically a datagram or segment of the higher-level transport layer protocol, but may be data for an internet layer (e.g., ICMP or ICMPv6) or link layer (e.g., OSPF) instead.

Two different versions of IP are used in practice today: IPv4 and IPv6. The IPv6 header uses IPv6 addresses and thus offers a much bigger address space but is not backward compatible with IPv4.

IPv4

IPv4 is the fourth version in the development of the Internet Protocol, and routes most traffic on the Internet.[non-primary source needed] The IPv4 header includes thirteen mandatory fields and is as small as 20 bytes. A fourteenth optional and infrequently used options field can increase the header size.

IPv6

IPv6 is the successor to IPv4 and has a different header layout. It was defined in 1998 and is in various stages of production deployment. The header in IPv6 packets is subdivided into a mandatory fixed header and optional extension headers.

References

  1. ^ "BGP Analysis Reports". Retrieved 2013-01-09.