What is the difference between public and private IP addresses?
Unique Internet protocol addresses, more known as IP addresses, are used to identify each computer connected to the network, whether it be a private network, such as the workplace or a public network that is worldwide. The IP addressing diagram allows computers to locate each other and exchange information. The public IP address is assigned to each computer that connects to the Internet, while private addresses are used to distinguish between computers on the same network of local area (LAN). It is similar to the way the phone numbers work in the office; Usually there is one main trading number for the company (public IP address), while each employee can have a separate extension, so calls can be directed to the relevant individual (private IP address).
What is the IP address?
IP address is a number of binary numbers that provide network information and host (computer or other device). These numbers are usually version 4 (IPv4) written as čTyři numbers separated by dots in older, IP version 4 (IPv4), which is most common. Since the number of available addresses in IPv4 format is limited and occurs, new numbering called IPv6 was designed at the age of 90. In this format, IP addresses are written as eight groups of four letters and numbers of separate columns, although zero groups may be omitted. Private addresses are in IPv6.
known as "local use"public addresses
IP public addresses are addresses that allow any two computers to identify. When a person connects to the Internet, its computer is usually assigned an address from a fund that has been set aside for its Internet service providers (ISP) to use it for its customers. When you enter the website address - such as Wisegeek.com - this domain name is converted to an IP address for that server hosts the site. Server uses a public IP address computere to know where to send the desired page of the site.
private addresses
When several computers or devices are connected to each other, either with cables or wirelessly, they can form a private network. Each device in this network is assigned a different IP address to replace files and resources sharing in the network. Although addresses must be unique in the private network, all private networks could all use the same addresses; Since computers in different networks directly do not conscious, it does not matter if they have the same address. The device called a network router transmits data back and forth between connected computers using private IP addresses as identifiers.
A private network or one of the computers on the network is usually connected to the Internet via a modem. The router or firewall in the network is assigned to the public IP address of the Ipos Acquisition of the Nternet (ISP) Services; This single public IP address identifies the entire network on the Internet. Using the built -in device called the translator of the network address (NAT) actsThe router as a guard and transmits the requirements of individual computer users to the Internet. The returned data is delivered back to the public IP address, with the router determining which private IP address required information.
static and dynamic
public address IP can be static or dynamic. The static IP address does not change and is mainly used for hosting websites or services on the Internet. Some players and people who regularly use Voice Over IP (VoIP) also prefer static IP because it can make communication easier. The dynamic IP address is selected from a group of available addresses and changes every time the user connects to the Internet. Most computers have a dynamic public IP address because it is a standard address type that is assigned when the user uses services.
Finding an IP address of the computer
There are many programs available online that allows users to see assigned public addresses of IP your computer or sometimes other ua lid. It is also possible to display private IP addresses using a network router configuration dialog. Before trying to access or change information in the network router, perhaps computer users.
private ranges
There are specific, excluded ranges detained for the use of a private network within the scope of publicly available IP addresses. In IPv4, the IP ranges are as follows:
- 10.0.0.0 ... 10,255.255.255
- 172.16.0.0 ... 172.31.255.255
- 192.168.0.0 ... 192.168.255.255
in IPv6, local addresses-the e-convivalent of private addresses IPv4-run FE followed C, D, E or F. Another type called link-Local has nothing to comparison in IPv4 and is used only for special purposes in physical networks. They also start Fe, followed by 8, 9, or b.
Who coordinates IP addresses?
Internet assigned by the Iana (IANA) Office is responsible for supervision of global allocation of IP numbers, including related protocols. Iana, once autonomousThe organization is now working under the supervision of Internet Corporation for assigned names and numbers (ICANN). ICANN is also responsible for the assignment and maintenance of internet domain names, such as the ending in .com and .org. IP addresses, domain names and other identifiers simplify the complicated process of connecting computers with each other to easily exchange information.