What is an IP Address ?
IP address ( IP stands for English word : Internet Protocol - Internet protocol ) address is a unique electronic devices that currently use to identify and communicate with each other by computer trenmang using Internet protocol .
Each IP address is unique in the network level .
A more simple way : an IP address of a computer joining networks for computers may transfer information to each other correctly , avoiding misplaced . We may see the IP address of the computer network like your home address for postal worker delivering mail properly can you not someone else .
Any network device - including routers , network switches , computers , infrastructure servers (eg, NTP , DNS , DHCP , SNMP , etc. ) , printers , Internet fax machines , and some - phone networks are involved in their own address , and this address is unique in the scope of a particular network . Some IP addresses have unique values within the global Internet , while others need to be unique only within a company .
The IP address acts as a locator for one IP device to find and communicate with each other . However, its purpose is not used as the identifier always uniquely identifies a particular device . In current practice , an IP address with virtually no identifier , due to technologies such as dynamic address assignment and network address translation editor .
IP Address allocated by the Organization Internet numbers ( IANA ) manages and creates . IANA generally divide the " super block " to the Internet Agency area , and from there it divided into smaller blocks to Internet service providers and companies .
Management IP address in the network level
The IP address should be administered in a reasonable manner to avoid conflicts while simultaneously have two identical IP addresses on the same level computer network .
On a global network ( Internet ) , an organization stand out management allocates the IP range for the service provider Internet connection ( IXP , ISP ) IP ranges to offer its customers .
At the end of smaller networks ( WAN ) , network administrator to provide classes for smaller networks via the DHCP server .
In smaller networks ( LAN ) , the management IP address is often due to the internal ADSL modem ( DHCP ) assigns IP addresses to each computer ( when set to automatic mode in the operating system ) or by user- settings .
IP Address Assignment Type
IP static / dynamic when using the InternetIP term " static " is referred to as a fixed IP address reserved for a person , or group of devices that use their internet connection to always put an IP address . Normally static IP for a server with a particular purpose ( Web server , mail ... ) so that more people can access without interrupting the process.
Some ISPs will require customers to declare ( or committed ) for the purpose of using a static IP to manage the services provided to the client static IP ( to avoid creating servers that provide services not registered or not permitted under the regulations of each country ) .
In contrast with the Dynamic IP Static IP : If the service does not use a static IP address special needs , customers are ISPs normally assign different IP every time you connect or be connected in a modified version into other IP . Action of the ISP dynamic IP address to save IP address resources are exhausted now . When a computer is not connected to the Internet provider that uses IP to give a different user .
So if they use dynamic IP users can not become a service provider on the Internet (such as setting up a web page , open a proxy to allow others to freely through it to conceal the traces . .. on my main computer ) by IP address instead doi.Khong must always be so, if the service provider to create it on their computer , then announce to others who can access the IP period that have not been altered , and added the condition that the ISP 's create a firewall service is not set to not allow unauthorized access to .
Due to the use of dynamic IP ( shared IP combined ) to Internet users in Vietnam are often troubled by the consequences of the destruction from the previous IP users ( or at the same time by using general IP ) . Many websites , the Internet service provider multiform ... , was banned ( block ) some IP addresses spammers or cause damage from the IP address is defined as has been granted to the IXP , Vietnamese ISP South .
IPv4 Address
IP addresses under IPv4 uses 32 bits to encode data . IP Address ( IPv4 ) takes the following form : EFG.HIJ.KMN.OPQ (eg an IP address : 220.231.124.5 )
In which each character in the figure represents a user computer , modem or a DHCP server ( Dynamic Host Configuration Protocol ) assigned to them .
IPv6 Address
IP addresses using IPv6 128 bits to encrypt data , it allows the use of more than IPv4.Uoc address computer IP addresses IPv6 allows providers ( 4 * 10 ^ 4 ) ^ 4 ( 4 caps 5 billion ) at the same IP address .
IP Address IPv6 is slowly being introduced by IPv4 resources are depleted due to the rapid development of information technology . However, because of compatibility with older devices , so that all can see for IPv4 , organizations have proposed migration path from IPv4 to IPv6 began in 2019 to 2033 .
Shared IP on the Internet
Because IPv4 IP addresses are becoming not enough to provide for all subscribers connected to the Internet , many computer users have the same IP address in the global network level .A simple example : The Internet cafe , or a company with a lot of computers , but only one connection to the Internet service provider , all the computers that are sharing an IP representative when connected to the global Internet .
When the computer uses the same IP packets and transported to be routed to it between the user's computer to a server to provide services ( remote ) to ensure accurate ( and not to other machines shared IP ) through an internal server ( close ) or a router ( the router ) .
At the family level user , the ADSL modem today ( more than one port can be USB + RJ - 45 or RJ - 45 port 3-5 ) are also integrated router and allows multiple machines computer and Internet connection sharing an IP representative .
The method of connecting to the Internet using dial-up modem ( dial -up ) not previously integrated router . The Internet connection sharing often through a computer first , then connect the computer through the router , switch , hub or network cards on the computer.
