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General: Data Packets

What part of a data packet contains the routing and handling information?

A. Directory
B. Preamble
C. Header
D. Footer

The answer is C. Header.  When dealing with data “packets”, no matter the type, there has to be a portion of data that contains information regarding what’s to be done with the data inside it.  This section is called the header, because it occupies the section at the front, or the head, of the packet.

TCP packets (used to deliver this web page to you!) are an example of a data packet that contains a header.  The above image shows how much information is packed into this section.  Data such as the source and destination address, TTL, protocol, error correction data, and more.

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