Header

Definition & Meaning

Last updated 23 month ago

What Is a Header?

A header is part of a Record or statistics Packet that consists of Metadata or other Data vital for processing the principle statistics. It is a extensively used time period in facts generation that refers to any supplemental records that are located earlier than the real facts. The header usually marks the begin of the facts. When data are transmitted in Datagrams, the header holds the critical records together with the supply and vacation spot address, packet type and length, and associated details. Similarly, the header is utilized in one-of-a-kind Forms of documents for unique Functions.

What Does Header Mean?

A header is a part of a record, facts packet or message that contains important records that is supplementary to the real statistics. The contents of the header differ from File to file. Below are a few examples of header contents:

  • Email: The e mail header precedes the text message contained in an e-mail. It includes facts inclusive of the sender, recipient, situation, Timestamp and other related information.
  • HTTP message: Every message sent through the HTTP Protocol includes a header that includes information about the content kind, HTTP version, User Agent, and so forth.
  • Data Packet: The header part of a data packet transmitted over the Internet includes records approximately the Payload type, series quantity, IP addresses of the sender and Receiver, and so forth.
  • Word Processing documents: The header of a word processing document is used for including Greater info together with the author’s name, quantity of pages, date, etc.
  • Graphics files: The header of a graphics record carries statistics approximately the photo size (width and peak), intensity, decision, layout, number of colors, and so forth.
  • Archive/Binary document: The header of an archive or binary document acts as a signature that identifies the report format and compatible Software Program that may be used to open/edit the report.
  • Program supply Code: Header files are used to Insert certain processing information and/or meeting documents into a source record.
  • HTML record: The header segment, which is defined by using the <head> tag, is used to maintain Metadata and the name of the html file.

Depending on the utility, a header may be either non-compulsory (e.G., HTML file) or obligatory (e.G., records packet). It serves many functions which include idEntity, Authentication, verification, and so forth. The header of a facts packet can also be used for tracing the course of the facts packet from the sender to the receiver.

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