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Which of the following is used to identify every computer in the internet?
1. Internet address
2. IP address
3. Location address
4. Computer name

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Correct Answer - Option 2 : IP address

The Correct Answer is "IP address".

  • Every machine on the Internet has a unique identifying number, called an IP Address.
  • The IP stands for Internet Protocol, which is the language that computers use to communicate over the Internet.
  • A protocol is a pre-defined way that someone who wants to use a service talks with that service.
  • The "someone" could be a person, but more often it is a computer program like a Web browser.
  • A typical IP address looks like this: 216.27.61.137.
  • To make it easier for us humans to remember, IP addresses are normally expressed in decimal format as a dotted-decimal number like the one above.
  • But computers communicate in binary form.
  • Look at the same IP address in binary: 11011000.00011011.00111101.10001001.

 

  •  An IP address is a unique identifier assigned to a device or domain that connects to the Internet
  • Each IP address is a series of characters, such as '192.168.1.1'. Via DNS resolvers, which translate human-readable domain names into IP addresses, users are able to access websites without memorizing this complex series of characters. 
  • Each IP packet will contain both the IP address of the device or domain sending the packet and the IP address of the intended recipient, much like how both the destination address and the return address are included on a piece of mail.
  • IP Address is either a four-byte (IPv4) or an eight-byte (IPv6) address.
  • A device attached with IP Address can retrieve by RARP protocol.
  • IP Address operates in the network layer.
  • IP Address identifies the connection of the device on the network.
  • IP Address modifies with the time and environment.
  • IP Addresses can be found by a third party.

 

  • The four numbers in an IP address are called octets because they each have eight positions when viewed in binary form.
  • If you add all the positions together, you get 32, which is why IP addresses are considered 32-bit numbers.
  • Since each of the eight positions can have two different states (1 or zero), the total number of possible combinations per octet is 28 or 256.
  • So each octet can contain any value between zero and 255. Combine the four octets and you get 232 or a possible 4,294,967,296 unique values.
  • Out of the almost 4.3 billion possible combinations, certain values are restricted from use as typical IP addresses.
  • For example, the IP address 0.0.0.0 is reserved for the default network, and the address 255.255.255.255 is used for broadcasts.

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