what is ip address?? and ip address classes

what is ip address?? and ip address classes, If you are confused and looking for answers to these questions, Then This Article Is Definitely For You. In This Article We Will Discuss About what is ip address?? Static ip address, dynamic ip address, what is IP address format & IP Address Classes?. So Without Wasting Time Let’s Know About ip addressing.

what is ip address??

what is ip address?? and ip address classes
what is ip address?? and ip address classes

ip address stands for Internet Protocol address.  Internet Protocol Addressing is a unique numeric address specifying machines/computers to identify and communicate with each other on a computer network that uses the Internet Protocol (IP) standard.  Connect your computer to the Internet by addressing any person or organization via Internet Protocol.
there are two types of ip address:

  • Static ip address
  • dynamic ip address

lets know in detail each of these ip address.

Static ip address

A static IP address is one where the computer uses the same address each time a user logs on to the network, e.g.  Internet.  Identification of a computer with a static IP address can be easily identified by others and users can easily connect with it.

dynamic ip address

In the case of a dynamic IP address where the IP address is assigned to the computer, usually by a remote server that acts as a dynamic host configuration protocol server.  IP addresses assigned using DHCP can change depending on the addresses available in the domain.

Each host on a TCP / IP network is assigned a unique 32-bit logical address divided into two main parts:

  1. Network number
  2. Host number.

* The network number identifies a network and must be specified by the Internet Network Information Center if the network is part of the Internet.

  * An Internet service provider (ISP) can obtain blocks of network addresses from the Internet Network Information Center and itself assign address space as necessary.

* The host number identifies the host on a network and is assigned by the local network administrator.

 * Each TCP / IP host is identified by a logical IP address.

* The IP address is a network layer address and there is no dependency on the data-link layer address.

* A unique IP address is required for each host and network component that communicates using TCP / IP.

 * IP address identifies the location of the system on the network in the same way that a street address identifies a house on a city block.  Just as a street address must identify a unique residence, an IP address must be globally unique and have a uniform format.

 Each IP address includes a network ID and a host ID.

Network ID (also known as network address) identifies systems that are located on the same physical network bound by IP routers.  All systems on the same physical network must have a same network ID.  Network ID must be unique for Internet work.

Host ID (also known as host address) identifies workstations, servers, routers, or other TCP / IPs within the network.  The address for each host must be unique to the network ID.

what is IP address format & IP Address Classes?

The 32-bit IP address is grouped eight bits at a time, separated by dots, and represented in decimal format (known as doffed decimal notation). Each bit within the octet features a binary weight (128, 64, 32, 16, 8, 4, 2, and 1). The minimum value for an octet is 0, and also the maximum value for an octet is 255.

IP Address Classes

The Internet community basically defines five address classes to accommodate networks of varying sizes. Only A, B and C classes are available for commercial use. The left-most (higher-order) bit indicates the network class, Microsoft supports classes A B and C addresses assigned to TCP / IP hosts. the category of address defines which bits are used for network IDs and which bits are used for host IDs. It also defines the possible number of networks and so the number of hosts per network.

 Class A:

*Class A addresses are assigned to networks with very large numbers of hosts.

* The higher-order bit in class A is always set to zero. * The next seven bits (complete the first octet) complete the network ID. This allows for 126 network IDs.

* The remaining 24 bits (last three octets) represent 16,777,214 hosts per network.

Class B:

* Class B addresses are assigned to medium-to-large-sized networks. 

* The two higher-order bits of a Class B address are always set to binary 10

* The next 14 bits (complete the first two octets) complete the network ID.  It will have 16,384 networks. 

* The remaining 16 bits (the last two octets) represent the host ID.  This allows 65,534 hosts per network.  (256 x 256 = 65536 – 2 (not all zeros and not all one))

 Class C:

* Class C addresses are used for small networks. 

* Three high-order bits in a Class C address are always set to binary 1 1 0.

* The next 21 bits (complete the first three octets) complete the network ID. 

* The remaining 8 bits (last octet) represent the host ID.  This allows for 2,097,152 networks and 254 hosts per network.

Class D:

* Class D addresses are reserved for IP multicast addresses.  Four higher-order bits in a class D address are always set to binary 1110.

* The remaining bits are for the address that the interested host identifies.

Class E:

* Class E is an experimental address set to high-order bits 1111 in

* Class E address.  Reserved for future use.

Conclusion Of What Is A Modem? & Types Of Modem

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Source: I&WT, Wikipedia
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