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Subnetting is the strategy used to partition a single physical network into more than one smaller logical sub-networks (subnets). An IP address includes a network segment and a host segment. Subnets are designed by accepting bits from the IP address’s host part and using these bits to assign a number of smaller sub-networks inside the original network. Subnetting allows an organization to add sub-networks without the need to acquire a new network number via the Internet service provider (ISP). Subnetting helps to reduce the network traffic and conceals network complexity. Subnetting is essential when a single network number has to be allocated over numerous segments of a local area network (LAN).


Perhaps the most recognizable aspect of subnetting is the subnet mask. Like IP addresses, a subnet mask contains four bytes (32 bits) and is often written using the same "dotted-decimal" notation.

For example, a very common subnet mask in its binary representation

11111111 11111111 11111111 00000000
is typically shown in the equivalent, more readable form

Commonly asked interview questions on Constructors

1.Your router has the following IP address on Ethernet0: Which of the following can be valid host IDs on the LAN interface attached to the router?

Answer :
A. 1 only
B. 2 and 3 only
C. 3 and 4 only
D. None of the above
Answer: Option C

2. Which two statements describe the IP address

Answer :1.The subnet address is
2.The lowest host address in the subnet is
3.The last valid host address in the subnet is
4.The broadcast address of the subnet is

A. 1 and 3
B. 2 and 4
C. 1, 2 and 4
D. 2, 3 and 4
Answer: Option B

3.What are the specific uses of SQL functions?

Answer :

4.What is the first valid host on the subnetwork that the node belongs to?

Answer :

5.What valid host range is the IP address a part of?

Answer : through to

Take Sample Test

Reference Books

1. Head First Java

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