Subnetting Questions 32 | Find the first valid host on the network

Subnetting Questions 32

Enter the first valid host on the network that the host 192.168.204.45/29 is a part of:

Solution

Hence, the IP Address starts 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.

Let’s find the Subnet Mask first

The CIDR value is /29, means we have to borrow another 5 bits for the network (24 + 5 = 29) and remaining 3 bits are host.

11111111 . 11111111 . 11111111 . 11111000

(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 + 2⁵ + 2⁴ + 2³)

255.255.255.248

Let’s count the number of subnets

2ⁿ (Here, n indicates the total number of network bits borrowed)

2⁵ = 32 Subnets are available.

Let’s count the number of IP Address on each network

2ⁿ (Here, n indicates the total number of host bits)

2³ = 8 IP Address is available on each network

List of top 5 subnets (Network)

Hence the IP Address 192.168.204.45 falls under the first network. Its first host is 192.168.204.41

Class C Subnetting video Tutorial

Subscribe to my YouTube channel TECHNICAL TECH for more videos on Networking