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  2. Wildcard mask - Wikipedia

    en.wikipedia.org/wiki/Wildcard_mask

    A wildcard mask can be thought of as an inverted subnet mask. For example, a subnet mask of 255.255.255.0 (11111111.11111111.11111111.00000000 2) inverts to a wildcard mask of 0.0.0.255 (00000000.00000000.00000000.11111111 2). A wild card mask is a matching rule. [2] The rule for a wildcard mask is: 0 means that the equivalent bit must match

  3. Subnet - Wikipedia

    en.wikipedia.org/wiki/Subnet

    The routing prefix of an address is identified by the subnet mask, written in the same form used for IP addresses. For example, the subnet mask for a routing prefix that is composed of the most-significant 24 bits of an IPv4 address is written as 255.255.255.0.

  4. Classless Inter-Domain Routing - Wikipedia

    en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

    A subnet mask is a bitmask that encodes the prefix length associated with an IPv4 address or network in quad-dotted notation: 32 bits, starting with a number of 1-bits equal to the prefix length, ending with 0-bits, and encoded in four-part dotted-decimal format: 255.255.255.0. A subnet mask encodes the same information as a prefix length but ...

  5. Private network - Wikipedia

    en.wikipedia.org/wiki/Private_network

    RFC 1918 name IP address range Number of addresses Largest CIDR block (subnet mask) Host ID size Mask bits Classful description [Note 1]; 24-bit block: 10.0.0.0 – 10.255.255.255: 16 777 216

  6. Default gateway - Wikipedia

    en.wikipedia.org/wiki/Default_gateway

    The network has a subnet mask of: 255.255.255.0 (/24 in CIDR notation) ... (192.168.1.0/24) so router1 will forward the packets to router3, which will deliver the ...

  7. List of assigned /8 IPv4 address blocks - Wikipedia

    en.wikipedia.org/wiki/List_of_assigned_/8_IPv4...

    Each / 8 block contains 256 3 = 2 24 = 16,777,216 addresses, which covers the whole range of the last three delimited segments of an IP address. This means that 256 /8 address blocks fit into the entire IPv4 space.

  8. Broadcast address - Wikipedia

    en.wikipedia.org/wiki/Broadcast_address

    As shown in the example below, in order to calculate the directed broadcast address to transmit a packet to an entire IPv4 subnet using the private IP address space 172.16.0.0 / 12, which has the subnet mask 255.240.0.0, the broadcast address is calculated as 172.16.0.0 bitwise ORed with 0.15.255.255 = 172.31.255.255. Directed broadcasts always ...

  9. Classful network - Wikipedia

    en.wikipedia.org/wiki/Classful_network

    The remaining 24 bits specified the local address, ... (2 30) 128.0.0.0: 191.255.255.255: 255.255.0.0 / 16: ... IP addresses are associated with a subnet mask. This ...