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  2. Network packet - Wikipedia

    en.wikipedia.org/wiki/Network_packet

    In the seven-layer OSI model of computer networking, packet strictly refers to a protocol data unit at layer 3, the network layer. [2] A data unit at layer 2, the data link layer, is a frame. In layer 4, the transport layer, the data units are segments and datagrams.

  3. Protocol data unit - Wikipedia

    en.wikipedia.org/wiki/Protocol_data_unit

    Protocol data units for the Internet protocol suite are: . The transport layer PDU is the TCP segment for TCP, and the datagram for UDP; The Internet layer PDU is the packet.; The link layer PDU is the frame.

  4. Packet switching - Wikipedia

    en.wikipedia.org/wiki/Packet_switching

    Data in the header is used by networking hardware to direct the packet to its destination, where the payload is extracted and used by an operating system, application software, or higher layer protocols. Packet switching is the primary basis for data communications in computer networks worldwide.

  5. Ethernet frame - Wikipedia

    en.wikipedia.org/wiki/Ethernet_frame

    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

  6. USB communications - Wikipedia

    en.wikipedia.org/wiki/USB_communications

    A data packet consists of the PID followed by 0–1,024 bytes of data payload (up to 1,024 bytes for high-speed devices, up to 64 bytes for full-speed devices, and at most eight bytes for low-speed devices), [12] and a 16-bit CRC. There are two basic forms of data packet, DATA0 and DATA1. A data packet must always be preceded by an address ...

  7. Packet processing - Wikipedia

    en.wikipedia.org/wiki/Packet_Processing

    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.

  8. List of IP protocol numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_IP_protocol_numbers

    This is a list of the IP protocol numbers found in the field Protocol of the IPv4 header and the Next Header field of the IPv6 header.It is an identifier for the encapsulated protocol and determines the layout of the data that immediately follows the header.

  9. Data pack - Wikipedia

    en.wikipedia.org/wiki/Data_pack

    A mobile data pack refers to an add-on which can enable you to boost the amount of data which you can use on your mobile phone. The rate at which you use your data can also be monitored, so you know how much data you have left. Mobile data is a service which provides a similar service to Wi-Fi and allows you to connect to the Internet.