In this article we will explore IP header in depth, analyzing its importance, its impacts and its influence on different aspects of daily life. IP header is a phenomenon that has attracted the attention of experts and scholars in different areas, since its relevance ranges from the personal to the global level. Throughout this article, we will examine the various aspects that make IP header a topic of interest and reflection, as well as the different perspectives from which it can be approached. In addition, we will delve into the implications that IP header has in different contexts and its potential to generate significant changes in society.
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 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 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.