First octet rule for each class:
Class A: 0xxxxxxx
Class B: 10xxxxxx
Class C: 110xxxxx
Class A range is 0 - 127
0.0.0.0 and 127.0.0.0 are not "routable" IP addresses. One defines all networks and the other is the loopback. We have a total of 126 usable networks and 16,777,214 usable hostaddresses per network. There are even less if we don't count the private address of 10.0.0.0 (RFC 1918).
Class B range is 128 - 191
There are 16,384 total networks in this class; that's including the private addresses of 172.16.0.0 - 172.31.0.0 (RFC 1918). There are a total of 65,534 usable host addresses per network.
Class C range is 192 - 223
There are 2,097,152 total networks in this class; that's including the private addresses of 192.168.0.0 - 192.168.255.0 (RFC 1918). There are 254 usable hosts addresses per network.
That would depend on the size you need for each network. The smallest possible network has 4 IP addresses - only 2 of them usable; those networks are used for point-to-point connections (such as serial connections, used on WAN networks). In this case, you would have a LOT of networks (divide the number of IP addresses in a class A address by 4 to find out how many!). However, for many practical purposes, you need larger networks.
Networks: 127
IP addresses per network: 16 million
Class A: Supports 16 million hosts on each of 127 networks.
Class B: Supports 65,000 hosts on each of 16,000 networks.
Class C: Supports 254 hosts on each of 2 million networks.
There are 16,777,214 unique IP addresses for each Class A address, however there are only 126 available Class A addresses.
With a default subnet mask of 255.0.0.0 and a network of 10.0.0.0...16777214 IP's.
127 networks.
16
IP addresses are divided into five IP classes:IP address class AIP address class BIP address class CIP address class DIP address class E
16 384 networks are available in Class B network.
18,446,744,073,709,551,616
254 host as 172.16.32.0/24
There are three "classes" of IPv4 subnets. Essentially, these refer to which "octet" is set. Class A: A /8 network (netmask 255.0.0.0) - the first octet is set and the rest belong to you. i.e. 128.x.y.z. You have 256x256x256/2^24 IPs available here. Class B: a /16 network (netmask 255.255.0.0) - the first two octets are set and the rest belong to you, i.e. 128.67.y.z. You have 256x256/2^16 IPs available. Class C: a /24 network (netmask 255.255.255.0) - the first three octets are set and the use of the fourth is yours, i.e. 128.67.4.z. You have 256/2^8 IPs available. It's possible your question may have meant types of addresses used (for routing purposes). There are broadcast addresses (send a packet to everyone on my local network), unicast (basically point-to-point connections, the most common) and multicast (senders/receivers communicate through a multicast IP, sending one packet to many destinations with just one transmission).
How many possible host addresses are there in a Class A range?Class A range is 0 - 1270.0.0.0 and 127.0.0.0 are not "routable" IP addresses. One defines all networks and the other is the loopback. We have a total of 126 usable networks and 16,777,214 usable hostaddresses per network.
CIDR
NAT
There are a total of 126 networks with 16,777,214 addresses per network in a Class A Address of ipv4. Such a big range Ha!
65,534
Address: 10.0.0.0 Mask: 255.0.0.0 Subnet bits: 0 1 subnet 8 mask bits total hosts 16777214 address range: 10.0.0.1 - 10.255.255.254 Using a single network: 16.78 million addresses Using VLSM more addresses can be made available.
IP addresses are divided into five IP classes:IP address class AIP address class BIP address class CIP address class DIP address class E
License? Where do you get this? In a Class B network there are 2 to the 16th power addresses. Class B = 255.255.0.0 65536 addresses In a Class A network there are 2 to the 24th power addresses Class A = 255.0.0.0 16,777,216 addresses In a class C network there are 2 to the 8th power addresses Class C = 255.255.255.0 256 addresses Class A around 16 million Class B around 65,000 Class C is actually 254 NOT 256. IP addresses are leased and therefore the lessee is given a license to use that particular IP address.
These hidden addresses can be used many times in many different organizations. This way different organizations can use the same address range and not collide with other networks.
16 384 networks are available in Class B network.
6
It depends on how many interfaces of router are connected to other networks. If a router is connected to two network, it will have 2 IP addresses. In a router having 4 ports it can connect to maximum 4 networks. In this case it will have 4 IP addresses.