WhatIsMyIP|工具線上App不用買-HotApp4Game

This app displays the Local IP Address and the External IP Address.An IP address (also called an IP number) is a number(typically written as four numbers separated by periods,i.e. 107.4.1.3 or 84.2.1.111) which uniquely identifies acomputer that is making use of the Internet. It is analogousto your telephone number in that the telephone number isused by the telephone network to direct calls to you. The IPaddress is used by the Internet to direct data to yourcomputer, e.g. the data your web browser retrieves anddisplays when you surf the net.It is like the address on the front of your house only it isan address that is compatible with the Internet. Just likeno two houses can have the same mail address, no twocomputers can have the same IP address.Every device connected to the public Internet is assigned aunique number known as an Internet Protocol (IP) address. IPaddresses consist of four numbers separated by periods (alsocalled a 'dotted-quad') and look something like 127.0.0.1.Since these numbers are usually assigned to internet serviceproviders within region-based blocks, an IP address canoften be used to identify the region or country from which acomputer is connecting to the Internet.Because the numbers may be tedious to deal with, an IPaddress may also be assigned to a Host name, which issometimes easier to remember. Hostnames may be looked up tofind IP addresses, and vice-versa. At one time ISPs issuedone IP address to each user. These are called static IPaddresses. Because there is a limited number of IP addressesand with increased usage of the internet ISPs now issue IPaddresses in a dynamic fashion out of a pool of IP addresses(Using DHCP). These are referred to as dynamic IP addresses.