Question

Assume class B networks use 18 out of 32 bits to define a network address. How many class B networks are possible in that case? Give justification for your answer.

Answer 1

Explanation:

An IP address which belongs to class B has the first two bits in the first octet set to 10, i.e. Class B IP Addresses range from 128.0.x.x to 191.255.x.x. The default subnet mask for Class B is 255.255.x.x. Class B has 16384 (214) Network addresses and 65534 (216-2) Host addresses.

Internet Protocol version 4 (IPv4) defines an IP address as a 32-bit number. However, because of the growth of the Internet and the depletion of available IPv4 addresses, a new version of IP (IPv6), using 128 bits for the IP address, was standardized in 1998.

Answer 2

In network SUBNET plays a major role in the network and determined number client or workstation connected or connectivity to the network.

For example if subnet is 255.255.x.x then it is class B.  calculations as follows first two bits in the first octet set to 10, i.e. 65536

STEP1 = $255 \times 255 (2) 16$

STEP2 = 65536

STEP3 = $65536 -  2$

STEP 4 = 65534 No.of stations can be connected.

(ipv4) and i(pv6) internet protocol  is been used in network.

32 bit number is used for (ipv4) and 128 bit numbers is used for (ipv6).

Since user and growth of internet is increased mostly ipv6 is used.

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