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  2. IP address - Wikipedia

    en.wikipedia.org/wiki/IP_address

    All receivers capture the network packet. The address 255.255.255.255 is used for network broadcast. In addition, a more limited directed broadcast uses the all-ones host address with the network prefix. For example, the destination address used for directed broadcast to devices on the network 192.0.2.0 / 24 is 192.0.2.255. [24]

  3. Reserved IP addresses - Wikipedia

    en.wikipedia.org/wiki/Reserved_IP_addresses

    Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255

  4. Broadcast address - Wikipedia

    en.wikipedia.org/wiki/Broadcast_address

    A special definition exists for the IP address 255.255.255.255. It is the broadcast address of the zero network or 0.0.0.0, which in Internet Protocol standards stands for this network, i.e. the local network. Transmission to this address is limited by definition, in that it is never forwarded by the routers connecting the local network to ...

  5. Wildcard mask - Wikipedia

    en.wikipedia.org/wiki/Wildcard_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; 1 means that the equivalent bit does not matter

  6. Classful network - Wikipedia

    en.wikipedia.org/wiki/Classful_network

    The number of addresses usable for addressing specific hosts in each network is always 2 N - 2, where N is the number of rest field bits, and the subtraction of 2 adjusts for the use of the all-bits-zero host value to represent the network address and the all-bits-one host value for use as a broadcast address. Thus, for a Class C address with 8 ...

  7. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    The range of port numbers from 1024 to 49151 (2 10 to 2 15 + 2 14 − 1) are the registered ports. They are assigned by IANA for specific service upon application by a requesting entity. [ 2 ] On most systems, registered ports can be used without superuser privileges.

  8. Default route - Wikipedia

    en.wikipedia.org/wiki/Default_route

    The default route in Internet Protocol Version 4 (IPv4) is designated as the zero address, 0.0.0.0 / 0 in CIDR notation. [2] Similarly, in IPv6, the default route is specified by :: / 0. The subnet mask is specified as / 0, which effectively specifies all networks and is the shortest match possible. A route lookup that does not match any other ...

  9. Multicast address - Wikipedia

    en.wikipedia.org/wiki/Multicast_address

    Addresses in the reserved 224.2.0.0 / 16 range are not individually assigned by IANA. Fallen out of use [ 11 ] : §10 for security considerations, experimental Session Announcement Protocol [ 12 ] was the primary means of supplying addresses through Session Description Protocol , which now is mostly used in the establishment of private sessions.