IP address

Topics: IP address, IPv6, Internet Pages: 2 (320 words) Published: September 21, 2014
An IP address serves two principal functions:
host or network interface identification & location addressing. Its role has been characterized as follows: A name indicates what we seek, An address indicates where it is, A route indicates how to get there. It encodes a network number (network prefix) and a host number. IP address are either dynamic or static. Our mobile network or broadband has dynamic address. Server has static address. Example: ellington.cs.virginia.edu

Network address is: 128.143.0.0 (or 128.143)
Host number is: 137.144
Netmask is: 255.255.0.0 (or ffff0000)

Prefix or CIDR notation: 128.143.137.144/16
Network prefix is 16 bits long
IP VERSIONS
Two versions of the Internet Protocol (IP) are in use: IP Version 4 and IP Version 6. Each version defines an IP address differently. Because of its prevalence, the generic term IP address typically still refers to the addresses defined by IPv4. The gap in version sequence between IPv4 and IPv6 resulted from the assignment of number 5 to the experimental Internet Stream Protocol in 1979, which however was nevThe designers of the Internet Protocol defined an IP address as a 32-bit number and this system, known as Internet Protocol Version 4 (IPv4), is still in use today. However, due to the enormous growth of the Internet and the predicted depletion of available addresses, a new version of IP (IPv6), using 128 bits for the address, was developed in 1995. IPv6 was standardized as RFC 2460 in 1998, and its deployment has been ongoing since the mid-2000s.

IP addresses are binary numbers, but they are usually stored in text files and displayed in human-readable notations, such as 172.16.254.1 (for IPv4) and 2001:db8:0:1234:0:567:8:1 (for IPv6). The Internet Assigned Numbers Authority (IANA) manages the IP address space allocations globally and delegates five regional Internet registries (RIRs) to allocate IP address blocks to local Internet registries (Internet...
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