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  2. Internet checksum - Wikipedia

    en.wikipedia.org/wiki/Internet_checksum

    The Internet checksum, [1] [2] also called the IPv4 header checksum is a checksum used in version 4 of the Internet Protocol (IPv4) to detect corruption in the header of IPv4 packets. It is carried in the IPv4 packet header, and represents the 16-bit result of the summation of the header words. [3] The IPv6 protocol does not use header checksums.

  3. Bogon filtering - Wikipedia

    en.wikipedia.org/wiki/Bogon_filtering

    As of November 2011, the Internet Engineering Task Force (IETF) recommends that, since there are no longer any unallocated IPv4 / 8 s, IPv4 bogon filters based on registration status should be removed. [8] However, bogon filters still need to check for Martian packets.

  4. Server Name Indication - Wikipedia

    en.wikipedia.org/wiki/Server_Name_Indication

    Server Name Indication (SNI) is an extension to the Transport Layer Security (TLS) computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. [1]

  5. Kernel panic - Wikipedia

    en.wikipedia.org/wiki/Kernel_panic

    He said, "We left all that stuff out. If there's an error, we have this routine called panic, ... ""See Linux Documentation/init.txt for guidance.");} Operating ...

  6. Martian packet - Wikipedia

    en.wikipedia.org/wiki/Martian_packet

    In Linux terminology, a Martian packet is an IP packet received by the kernel on a specific interface, while routing tables indicate that the source IP is expected on another interface. [ 3 ] [ 4 ] The name is derived from packet from Mars , meaning that packet seems to be not of this Earth.

  7. Internet Control Message Protocol - Wikipedia

    en.wikipedia.org/wiki/Internet_Control_Message...

    The ICMP header starts after the IPv4 header and is identified by its protocol number, 1. [6] All ICMP packets have an eight-byte header and variable-sized data section. The first four bytes of the header have fixed format, while the last four bytes depend on the type and code of the ICMP packet.

  8. Common Address Redundancy Protocol - Wikipedia

    en.wikipedia.org/wiki/Common_Address_Redundancy...

    The Common Address Redundancy Protocol or CARP is a computer networking protocol which allows multiple hosts on the same local area network to share a set of IP addresses.Its primary purpose is to provide failover redundancy, especially when used with firewalls and routers.

  9. Uniform Resource Identifier - Wikipedia

    en.wikipedia.org/wiki/Uniform_Resource_Identifier

    IPv4 addresses must be in dot-decimal notation, and IPv6 addresses must be enclosed in brackets ([]). [13]: §3.2.2 [c] An optional port subcomponent preceded by a colon (:), consisting of decimal digits. A path component, consisting of a sequence of path segments separated by a slash (/). A path is always defined for a URI, though the defined ...