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How are the number of blocks for different classes in classful . . . netid = number of blocks hostid = block size IP address has total of 4 bytes and is divided into 5 classes depending on the initial bit (s) In class A, one byte define the netid and 3 bytes defines the hostid In class B, two bytes define the netid and 2 bytes defines the hostid In class C, three bytes define the netid and 1 byte defines the hostid Hence; for A number of blocks = 2^7 as 1
ip address - How many number of hosts do IP classes A, B, and C have . . . There are also Special Use Addresses within those classes, like loopback, private network, link-local addresses and so on The difference in number of addresses available between Class A, B and C networks is due to leading bit prefix length (1 bit for Class A, 2 bits for Class B, 3 bits for Class C) To answer your question:
private IP address classes - Stack Overflow according to some references Class C for example can provide 2^8 hosts (mask 24), according to others it can provide 2^16 hosts (mask 16) ? so what is the real mask of C class ??
Why does my IP address start with 192. ? - Stack Overflow class C: 11000000 10101000 (#1 nibble: 2021): 192 168 16 Network Calculators: CIDR VLSM Supernet Calculator and for classful subnets, use the IP Subnet Calculator Network Calculators IP Calculator Further links: What Is an IP Address? IPv4 CIDR - Classless Inter Domain Routing: Mind that CIDR does not have classes, therefore: "classless"
ip - Difference Reserved Class B Networks 192. 168 vs 172. 16 - Stack . . . A 'network' or 'subnet' is a set of ip-numbers that can connect to each other without the use of a router A class C network has a maximum of 256 such ip-addresses To get from one subnet to another subnet, a router is required You can not call the 192 168 xxx yyy block a single class B subnet, because the hosts at 192 168 1 xxx cannot directly connect to hosts in 192 168 2 xxx The hosts are
How do we determine the class of the IP address? How could 128 138 243 100 26 be class B if we flow rule 1 Since rule 1 says class B should be N N H H but in the above example clearly the N part of the IP address is beyond N N N (here it even encroaches two bit of the H )
IPv4 Classes - are they useful in any way nowadays? Moreover, apart from IP ranges, these Classes define which part of the address is the network and which is the node host For instance, if an IP address begins with 200, then we know that it's a Class C and thus its first 3 bytes should define the network and the fourth one defines the host in that network
Why do class D and E IP-addresses have no subnet mask? We have not had network classes in this century Multicast (former Class D) uses individual addresses for groups of hosts, and it has no network concept that needs network masks The Reserved addresses (former Class E) cannot be used, so there is no network concept that needs network masks