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  2. 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.

  3. Dynamic Host Configuration Protocol - Wikipedia

    en.wikipedia.org/wiki/Dynamic_Host_Configuration...

    Download QR code; Print/export Download as PDF ... 0xC0A80101 or 192.168.1.1) 52 416 GIADDR (Gateway IP address: 0x00000000 ... If that server is down or unreachable, ...

  4. Network address translation - Wikipedia

    en.wikipedia.org/wiki/Network_address_translation

    Network address translation between a private network and the Internet. Network address translation (NAT) is a method of mapping an IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device. [1]

  5. Private network - Wikipedia

    en.wikipedia.org/wiki/Private_network

    The AS112 project attempted to mitigate this load by providing special black hole anycast nameservers for private address ranges which only return negative result codes (not found) for these queries. Organizational edge routers are usually configured to drop ingress IP traffic for these networks, which can occur either by misconfiguration or ...

  6. Default gateway - Wikipedia

    en.wikipedia.org/wiki/Default_gateway

    The following example shows IP addresses that might be used with an office network that consists of six hosts plus a router. The six hosts addresses are:

  7. Bounce message - Wikipedia

    en.wikipedia.org/wiki/Bounce_message

    A bounce message or just "bounce" is an automated message from an email system, informing the sender of a previous message that the message has not been delivered (or some other delivery problem occurred).

  8. HTTP - Wikipedia

    en.wikipedia.org/wiki/HTTP

    In HTTP/1.0 and since, the first line of the HTTP response is called the status line and includes a numeric status code (such as "404") and a textual reason phrase (such as "Not Found"). The response status code is a three-digit integer code representing the result of the server's attempt to understand and satisfy the client's corresponding ...

  9. Cascading failure - Wikipedia

    en.wikipedia.org/wiki/Cascading_failure

    An animation demonstrating how a single failure may result in other failures throughout a network. A cascading failure is a failure in a system of interconnected parts in which the failure of one or few parts leads to the failure of other parts, growing progressively as a result of positive feedback.