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In telecommunications and computer networking, a network packet is a formatted unit of data carried by a packet-switched network. A packet consists of control information and user data; [ 1 ] the latter is also known as the payload .
In telecommunications, packet switching is a method of grouping data into short messages in fixed format, i.e. packets, that are transmitted over a digital network. Packets are made of a header and a payload .
Ethernet packet. The SFD (start frame delimiter) marks the end of the packet preamble. It is immediately followed by the Ethernet frame, which starts with the destination MAC address. [1] In computer networking, an Ethernet frame is a data link layer protocol data unit and uses the underlying Ethernet physical layer transport mechanisms.
In digital radio, packet radio is the application of packet switching techniques to digital radio communications. Packet radio uses a packet switching protocol as opposed to circuit switching or message switching protocols to transmit digital data via a radio communication link .
For example, it might add a port number to identify the application, a network address to help with routing, a code to identify the type of data in the packet and error-checking information. All this additional information, plus the original service data unit from the higher layer, constitutes the protocol data unit at this layer.
Packet (container), a small single use container; Cigarette packet; Sugar packet; Network packet, a formatted unit of data carried by a packet-mode computer network; Packet radio, a form of amateur radio data communications using the AX25 protocol; Packet trade, regularly scheduled cargo, passenger, and mail trade conducted by ship
In digital communications networks, packet processing refers to the wide variety of algorithms that are applied to a packet of data or information as it moves through the various network elements of a communications network. With the increased performance of network interfaces, there is a corresponding need for faster packet processing.
A "packet ship" was originally a vessel employed to carry post office mail packets to and from British embassies, colonies and outposts. In sea transport, a packet service is a regular, scheduled service, carrying freight and passengers. The ships used for this service are called packet ships or packet boats.