Subnetting Questions 8 | Find the Subnet Mask, Network ID and Host

Subnetting Question 8

You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports four subnets and a maximum number of hosts?

Solution

Hence, the IP Address start from 192 it indicates it is a Class C Address. By default, in Class C Address 24 bits are reserved for the network and 8 bits are reserved for the host.

A/Q, we need 4 Subnets. It means, we have to borrow 2 bits from the last octet. (2ⁿ = 2² = 4)

(11111111.11111111.11111111.11111100)

(2⁷ + 2⁶ + 2⁵ + 2⁴ + 2³ + 2² + 2¹ + 2⁰) . (2⁷ + 2⁶ + 2⁵ + 2⁴ + 2³ + 2² + 2¹ + 2⁰) . (2⁷ + 2⁶ + 2⁵ + 2⁴ + 2³ + 2² + 2¹ + 2⁰) . (2⁷ + 2⁶)

Therefore, the subnet mask is 255.255.255.192