The portion of a message that contains information used to guide the message to the correct destination (188) Note: Examples of items that may be in a header are the addresses of the sender and receiver, precedence level, routing instructions, and synchronizing bits
A block of data in the coded bitstream containing the coded representation of a number of data elements pertaining to the coded data that follow the header in the bitstream
The portion of a packet which contains the source and destination addresses, error checking, and other information A header is also the part of an e-mail message that precedes the body of the message and contains, among other things, the message originator, date and time, and subject lines
a brick that is laid sideways at the top of a wall or within the brickwork with the short side showing; compare stretcher
The Header of an article contains information about the sender, the subject and the newsgroup of the article
Information included at the top of an e-mail message that identifies the message's author, the recipient and lots of other technical details The full header is normally hidden from view