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When the IANA set up the IPv4 and then IPv6 protocols, the designers created the system to uniquely identify an electronic destination on the internet—not a physical one.
How private is my IP address? It depends. The operators of any website that you visit can see it. If you are not logged into Wikipedia, your IP address is publicly recorded with every edit that you make. If you are logged in, your IP address is hidden from all but a very small number of trusted administrators. In some cases, it is possible that ...
An Internet Protocol address (IP address) is a numerical label such as 192.0.2.1 that is assigned to a device connected to a computer network that uses the Internet Protocol for communication. [ 1 ] [ 2 ] IP addresses serve two main functions: network interface identification , and location addressing .
127.0.0.0/8 127.0.0.0–127.255.255.255 16 777 216: Host Used for loopback addresses to the local host [1] 169.254.0.0/16 169.254.0.0–169.254.255.255 65 536: Subnet 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 ...
0 HOPOPT IPv6 Hop-by-Hop Option: RFC 8200: 0x01 1 ICMP Internet Control Message Protocol: RFC 792: 0x02 2 IGMP Internet Group Management Protocol: RFC 1112: 0x03 3 GGP Gateway-to-Gateway Protocol: RFC 823: 0x04 4 IP-in-IP IP in IP (encapsulation) RFC 2003: 0x05 5 ST Internet Stream Protocol: RFC 1190, RFC 1819: 0x06 6 TCP Transmission Control ...
As the version number is carried in a 4-bit field, only numbers 0–15 can be assigned. IP version Description Status 0: Internet Protocol, pre-v4: Reserved. [3]
Transmission is handled similarly; established sockets may be used to transmit IPv4 or IPv6 datagram, based on the binding to an IPv6 address, or an IPv4-mapped address.::ffff:0:0:0 / 96 — A prefix used for IPv4-translated addresses. These are used by the Stateless IP/ICMP Translation (SIIT) protocol. [40] 64:ff9b:: / 96 — The well-known ...