header in Wiktionary, the free dictionary. Header may refer to: Header (computing), supplemental data at the beginning of a data block E-mail header HTTP...

precompiled headers may significantly reduce compilation time, especially when applied to large header files, header files that include many other header files...

In typography and word processing, a page header (or simply header) is text that is separated from the body text and appears at the top of a printed page...

HTTP header fields are a list of strings sent and received by both the client program and server on every HTTP request and response. These headers are...

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...

header. Each email message has a header (the "header section" of the message, according to the specification), comprising a number of fields ("header...

header and UDP data. The minimum length is 8 bytes, the length of the header. The field size sets a theoretical limit of 65,535 bytes (8-byte header +...

unauthenticated) IPv4 header fields are DSCP/ToS, ECN, Flags, Fragment Offset, TTL and Header Checksum. In IPv6, the AH protects most of the IPv6 base header, AH itself...

In information technology, header refers to supplemental data placed at the beginning of a block of data being stored or transmitted. In data transmission...

first header field in an IP packet is the four-bit version field. For IPv4, this is always equal to 4. Internet Header Length (IHL) The IPv4 header is variable...