Class C
in Class A addresses the first bit identifies the class. The next 7 bits identify the network and the rest are the IP's that belong to that network. However these networks are then broken down using subnets . Class A networks are not given to private clients or small private organisations. So if you want to know how many bits are there for identifying hosts in a Class A network, the answer is 32-8 = 24 bits. However if you mean how many bits are reserved for hosts in your private network space, that depends on your subnet and router. Most routers use NAT to allow multiple hosts to use a single external IP address. I hope this answers your question :)
IP address classes These IP addresses can further be broken down into classes. These classes are A, B, C, D, E and their possible ranges can be seen in Figure below. Class Start address Finish address A 0.0.0.0 126.255.255.255 B 128.0.0.0 191.255.255.255 C 192.0.0.0 223.255.255.255 D 224.0.0.0 239.255.255.255 E 240.0.0.0 255.255.255.255 Figure . IP address Classes If you look at the table you may notice something strange. The range of IP address from Class A to Class B skips the 127.0.0.0-127.255.255.255 range. That is because this range is reserved for the special addresses called Loopback addresses that have already been discussed above. The rest of classes are allocated to companies and organizations based upon the amount of IP addresses that they may need. Listed below are descriptions of the IP classes and the organizations that will typically receive that type of allocation. Default Network: The special network 0.0.0.0 is generally used for routing. Class A: From the table above you see that there are 126 class A networks. These networks consist of 16,777,214 possible IP addresses that can be assigned to devices and computers. This type of allocation is generally given to very large networks such as multi-national companies. Loopback: This is the special 127.0.0.0 network that is reserved as a loopback to your own computer. These addresses are used for testing and debugging of your programs or hardware. Class B: This class consists of 16,384 individual networks, each allocation consisting of 65,534 possible IP addresses. These blocks are generally allocated to Internet Service Providers and large networks, like a college or major hospital. Class C: There is a total of 2,097,152 Class C networks available, with each network consisting of 255 individual IP addresses. This type of class is generally given to small to mid-sized companies. Class D: The IP addresses in this class are reserved for a service called Multicast. Class E: The IP addresses in this class are reserved for experimental use. Broadcast: This is the special network of 255.255.255.255, and is used for broadcasting messages to the entire network that your computer resides on. IP address classes These IP addresses can further be broken down into classes. These classes are A, B, C, D, E and their possible ranges can be seen in Figure below. Class Start address Finish address A 0.0.0.0 126.255.255.255 B 128.0.0.0 191.255.255.255 C 192.0.0.0 223.255.255.255 D 224.0.0.0 239.255.255.255 E 240.0.0.0 255.255.255.255 Figure . IP address Classes If you look at the table you may notice something strange. The range of IP address from Class A to Class B skips the 127.0.0.0-127.255.255.255 range. That is because this range is reserved for the special addresses called Loopback addresses that have already been discussed above. The rest of classes are allocated to companies and organizations based upon the amount of IP addresses that they may need. Listed below are descriptions of the IP classes and the organizations that will typically receive that type of allocation. Default Network: The special network 0.0.0.0 is generally used for routing. Class A: From the table above you see that there are 126 class A networks. These networks consist of 16,777,214 possible IP addresses that can be assigned to devices and computers. This type of allocation is generally given to very large networks such as multi-national companies. Loopback: This is the special 127.0.0.0 network that is reserved as a loopback to your own computer. These addresses are used for testing and debugging of your programs or hardware. Class B: This class consists of 16,384 individual networks, each allocation consisting of 65,534 possible IP addresses. These blocks are generally allocated to Internet Service Providers and large networks, like a college or major hospital. Class C: There is a total of 2,097,152 Class C networks available, with each network consisting of 255 individual IP addresses. This type of class is generally given to small to mid-sized companies. Class D: The IP addresses in this class are reserved for a service called Multicast. Class E: The IP addresses in this class are reserved for experimental use. Broadcast: This is the special network of 255.255.255.255, and is used for broadcasting messages to the entire network that your computer resides on.
small network configer karne ke le
It is an Internet IP Address, often found in Small Domains, or large home networks
Class A IP addresses are not suitable for local area networks (LANs) because they are designed for very large networks, supporting up to 16 million hosts per network. The vast address space is inefficient for small networks, which typically require far fewer IP addresses. Additionally, using Class A addresses in a LAN can lead to routing inefficiencies and increased complexity. Instead, Class C addresses, which support up to 254 hosts, are more appropriate for most LAN configurations.
IP addresses are divided into five IP classes:IP address class AIP address class BIP address class CIP address class DIP address class E
There is nothing inherently "better" about the 24-bit block address space. If by "better" you mean "able to contain more addresses," then yes. 24-, 20-, and 16-bit network ranges are also known as class A, B, and C, respectively, and refer to ranges of IP addresses. Every device that directly accesses the internet has a unique IP address. IP addresses are commonly represented as a set of four numbers (called "octets") separated by periods, e.g. "145.94.112.18". Each of the numbers can be in the range of 0-255, and some sets of numbers have special meanings. The range of IP addresses is divided up into three classes based on the first octet. If the first octet is from 0-127 it's class A, 128-191 is class B, and 192-223 is class C. The octets of an IP address are divided up into a network portion and a host portion depending on what class it is. In class A addresses, the first octet is the network portion and the remaining three are the host portion. For class B, it's two-and-two, and for class C the first three are network and the remaining one is host. What does this network/host division mean? Generally, large entities (such as a company) are assigned a single network block of IP addresses. For instance, IBM is in control of the 9.0.0.0 network block. This is a class A address, meaning that the network portion is 9 and the rest is the host portion. IBM can divide this space up (using a technique called subnetting) any way it sees fit. Every computer within IBM would have a different ip in the 9 network, e.g. 9.4.109.10, 9.212.34.88. A class A (or 24-bit) block address has three octets it can use to create different IP addresses, such as "9.0-255.0-255.0-255". A class C (or 16-bit) block address has only one octet it can use to create different IP addresses, such as "192.168.1.0-255". You can clearly see that a class C block address contains less potential addresses than a class A or B block address. This doesn't make class C addresses any worse than class A ones, though. A small business (or a home network) doesn't need a million different IP addresses, so a 16-bit block address is perfect for them and if they had a class A or B all those numbers would be wasted.
The administrator can set up a Local Area Network (LAN) behind a firewall in which he can assign whatever IP address block he wishes. The firewall and router will then need to be configured to Network Address Translate (NAT) the 'hidden' internal IP addresses used on the LAN to the one assigned by the ISP when network traffic needs to leave the LAN.
Just a little caveat here, what Archangel dmitry lists here is true but should be regarded as only historical information since classed IP address assignment has not been used in over 20 years. It was replaced in 1993 by Classless Inter-Domain Routing. This was put in place to help deal with the quick depletion of available public IP addresses. In the modern day, IP addresses are assigned as needed rather than as blocks as was done when classed addressing was used.
Class C IP addresses are commonly used in practical applications, particularly for small to medium-sized networks. This class supports up to 254 hosts per network, making it ideal for organizations that don't require a large number of IP addresses. Class C addresses range from 192.0.0.0 to 223.255.255.255 and are often used for local area networks (LANs) and smaller subnet configurations.
CIDR = Classless interdomain addressing Before CIDR, the network portion of IP address were constrained to be 8, 16, or 24 bits in length, an addressing scheme known as *classful* addressing, since subnets with 8, 16, 24 bit subnet addresses were known as class A, B, C networks, respectively. This cause problem for rapidly growing number of organisations with small and medium sized subnets. A class C (24 bit) subnet could accomodate only up to 2^8 - 2 = 254 (nodes/hosts) (2 of the 256 addresses are reserved for special use) which is too small for many organisations. However, Class B is too large (65634 hosts). CIDR generalises the notion of subnet addressing. As with subnet addessing, the 32-bit (IPv4) address is divided into two parts and again has the dotted-decimal form a.b.c.d/x where x indicates the number of bits in the first part of the address. The x most significant bits of an address of the form a.b.c.d/x constitute the network portion of the IP address and are often referred to as the prefix (or network prefix) of the address. An organisation is typically assigned a block of contiguous addresses, that is , a range of addresses with a common prefix. In this case, the IP addresses of devices within the organisation will share the common prefix. The remaining bits of an address can be thought of as distinguishing among the devices within the organisation, all of which have the same network prefix. Reference: Computer Networking: A top down approach, James F. Kurose, Keith W. Ross
An anonymous class allows you to bind an unnamed ("anonymous") class for the purpose of leaving your class namespace relatively uncluttered in the source code. This is usually reserved for small classes with a simple function that is "inlined" into a larger class in order to make the source code smaller, albeit slightly less readable. While classes of any size may be anonymous, they should be small in size to avoid making the code less readable.