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  2. IP address - Wikipedia

    en.wikipedia.org/wiki/IP_address

    Public IP addresses may be used for communication between hosts on the global Internet. In a home situation, a public IP address is the IP address assigned to the home's network by the ISP. In this case, it is also locally visible by logging into the router configuration. [31] Most public IP addresses change, and relatively often.

  3. Private IP - Wikipedia

    en.wikipedia.org/wiki/Private_IP

    Whereas the Internet is a public offering, MPLS PIP networks are private. This lends a known, often used, and comfortable network design model for private implementation. Private IP removes the need for antiquated Frame Relay networks, and even more antiquated point-to-point networks, with the service provider able to offer a private extranet ...

  4. Reserved IP addresses - Wikipedia

    en.wikipedia.org/wiki/Reserved_IP_addresses

    Private network Used for local communications within a private network [3] 198.18.0.0/15 198.18.0.0–198.19.255.255 131 072: Private network Used for benchmark testing of inter-network communications between two separate subnets [9] 198.51.100.0/24 198.51.100.0–198.51.100.255 256: Documentation Assigned as TEST-NET-2, documentation and ...

  5. Private network - Wikipedia

    en.wikipedia.org/wiki/Private_network

    In Internet networking, a private network is a computer network that uses a private address space of IP addresses. These addresses are commonly used for local area networks (LANs) in residential, office, and enterprise environments. Both the IPv4 and the IPv6 specifications define private IP address ranges. [1] [2]

  6. Port forwarding - Wikipedia

    en.wikipedia.org/wiki/Port_forwarding

    In a typical residential network, nodes obtain Internet access through a DSL or cable modem connected to a router or network address translator (NAT/NAPT). Hosts on the private network are connected to an Ethernet switch or communicate via a wireless LAN. The NAT device's external interface is configured with a public IP address.

  7. Intranet - Wikipedia

    en.wikipedia.org/wiki/Intranet

    But with the Internet in the 1990s came a new type of network, virtual private networks, built over this public infrastructure, using encryption to protect the data traffic from eaves-dropping. So the enterprise networks are now commonly referred to as enterprise private networks in order to clarify that these are private networks, in contrast ...

  8. IPv4 - Wikipedia

    en.wikipedia.org/wiki/IPv4

    Since two private networks, e.g., two branch offices, cannot directly interoperate via the public Internet, the two networks must be bridged across the Internet via a virtual private network (VPN) or an IP tunnel, which encapsulates packets, including their headers containing the private addresses, in a protocol layer during transmission across ...

  9. Public data network - Wikipedia

    en.wikipedia.org/wiki/Public_data_network

    A public switched data network (PSDN) is a network for providing data services via a system of multiple wide area networks, similar in concept to the public switched telephone network (PSTN). [3] A PSDN may use a variety of switching technologies, including packet switching , circuit switching , and message switching . [ 3 ]