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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]
A local network uses one of the designated private IP address subnets (RFC 1918 [4]). The network has a router having both a private and a public address. The private address is used by the router for communicating with other devices in the private local network.
In a home or small office environment, the default gateway is a device, such as a DSL router or cable router, that connects the local network to the Internet. It serves as the default gateway for all network devices. Enterprise network systems may require many internal network segments. A device wishing to communicate with a host on the public ...
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.
SIADDR (Server IP address: 0xc0a80101 or 192.168.1.1) 52 416 GIADDR (Gateway IP address: 0x00000000) 56 448 CHADDR (Client Hardware address: 0x00053C04 0x8D590000 0x00000000 0x00000000) 60 480 64 512 68 544 72 576 192 octets of 0s, or overflow space for additional options; BOOTP legacy. ⋮ ⋮ 260 2080 264 2112 Magic Cookie (0x63825363)
When packets are sent over a network, the destination IP address is examined. If the destination IP is outside of the network, then the packet goes to the gateway for transmission outside of the network. The gateway is on the same network as end devices. The gateway address must have the same subnet mask as host devices. Each host on the ...
Amy Carter wipes here eye during a memorial ceremony for former President Jimmy Carter in the Rotunda at the U.S. Capitol on Jan. 7, 2025 in Washington, DC.
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 ...