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  2. 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 1 048 576: Private network Used for local communications within a private network [3] 192.0.0.0/24 192.0.0.0–192.0.0.255 256

  3. Network address translation - Wikipedia

    en.wikipedia.org/wiki/Network_address_translation

    If any DNAT rules were present, address translation is still in effect; the router still rewrites the source IP address in the packet. The local computer ( 192.168.1.100 ) sends the packet as coming from 192.168.1.100 , but the server ( 192.168.1.2 ) receives it as coming from 203.0.113.1 .

  4. IPv4 shared address space - Wikipedia

    en.wikipedia.org/wiki/IPv4_shared_address_space

    If an ISP deploys a CGN and uses private Internet address space [2] (networks 10.0.0.0 / 8, 172.16.0.0 / 12, 192.168.0.0 / 16) to connect their customers, there is a risk that customer equipment using an internal network in the same range will stop working.

  5. Virtual Router Redundancy Protocol - Wikipedia

    en.wikipedia.org/wiki/Virtual_Router_Redundancy...

    This address is used by only one physical router at a time, and it will reply with this MAC address when an ARP request is sent for the virtual router's IP address. Physical routers within the virtual router must communicate within themselves using packets with multicast IP address 224.0.0.18 and IP protocol number 112 [1] for IPv4, or ff02::12 ...

  6. IPv6 deployment - Wikipedia

    en.wikipedia.org/wiki/IPv6_deployment

    The deployment of IPv6, the latest version of the Internet Protocol (IP), has been in progress since the mid-2000s. IPv6 was designed as the successor protocol for IPv4 with an expanded addressing space. IPv4, which has been in use since 1982, is in the final stages of exhausting its unallocated address space, but still carries most Internet ...

  7. NAT traversal - Wikipedia

    en.wikipedia.org/wiki/NAT_traversal

    Network address translation typically uses private IP addresses on private networks with a single public IP address for the router facing the Internet.The network address translator changes the source address in network protocols for outgoing requests from that of an internal device to its external address, so that internal devices can communicate with hosts on the external network, while ...

  8. Virtual IP address - Wikipedia

    en.wikipedia.org/wiki/Virtual_IP_address

    A VIP address can be used to provide nearly unlimited mobility. For example, if an application has an IP address on a physical subnet, that application can be moved only to a host on that same subnet. VIP addresses can be advertised on their own subnet, [a] so its application can be moved anywhere on the reachable network without changing ...

  9. IPv4 address exhaustion - Wikipedia

    en.wikipedia.org/wiki/IPv4_address_exhaustion

    This means that general-purpose computers must still have IPv4 access, for example through NAT64, in addition to the new IPv6 address, which is more effort than just supporting IPv4 or IPv6. [ 29 ] In early 2011, only 16–26% of computers were IPv6 capable, while only 0.2% preferred IPv6 addressing [ 30 ] with many using transition methods ...