Types of Internet Protocol (IP address)
- Dynamic IP addresses - are temporary and are assigned (via DHCP) each time a computer joins a network.DHCP assigns IP addresses using a pool of available addresses which are part of the whole addressing scheme. Though DHCP only provides addresses that are not static, many machines reserve static IP addresses that are assigned to that entity forever and cannot be used again. DHCP is the most frequently used technology for assigning addresses. It avoids the administrative burden of assigning specific static addresses to each device on a network. It also allows devices to share the limited address space on a network if only some of them are online at a particular time.
- Static IP - Network infrastructure devices such as servers, routers, and firewalls are typically assigned permanent "static" IP addresses. Static IP addresses are generally preferable for such uses as VOIP (Voice over Internet Protocol), online gaming, or any other purpose where users need to make it easy for other computers to locate and connect to them. Static IP addresses are considered somewhat less secure than dynamic IP addresses since they are easier to track for data mining purposes.
Internet Protocol (IP address) version (IPv4 vs IPv6)Internet Protocol version 4 (IPv4) defines an IP address as a 32-bit number. IPv4 addresses are constructed means it's able to provide over 4 billion unique IP addresses, However, because of the growth of the Internet and the depletion of available IPv4 addresses. IPv4 addresses are usually represented in dot-decimal notation, consisting of four decimal numbers. IPv4 addresses are written and displayed in human-readable notations, such as 172.16.254.1
A new version of IP (IPv6), using 128 bits for the IP address, was developed in 1995, and standardized as RFC 2460 in 1998. IPv6 deployment has been ongoing since the mid-2000s. IPv6 addresses are written in hexadecimal. IP addresses are usually in 2001:db8:0:1234:0:567:8:1.
IPv6 has facilities that automatically change the routing prefix of entire networks, should the global connectivity or the routing policy change, without requiring internal redesign or manual renumbering.