Definition 1:
A port or end of a cable. On a motherboard, the headers are the ports attached directly to the board such as USB , Video, or sound.
Definition 2:
A part of a packet in the TCP/IP networking protocol that contains information such as destination and source addresses.
Definition 3:
A mail header is the beginning portion of a mail message and contains information like who the message is from, its subject, and the date.
Definition 4:
The part of the HTTP request and response that is sent before the actual content, and that contains meta-information describing the content. |