What is the first valid host on the subnetwork that the node 172.19.49.43/21 belongs to?

An IP network can be logically divided into subnetworks or subnets. Subnetting is the process of splitting a network into two or more networks.
Similar most-significant bit groups are used in IP addresses to address computers that are on the same subnet.
A subnetwork is a segmented area of an overall network. Subnets, more particularly, logically segment an IP network into several, smaller network parts.
The Internet Protocol is used to transmit data from one computer to another through the internet (IP).
A subnetwork or subnetwork is a network that is contained within another network.
Subnets enhance the efficiency of grids. Thanks to subnetting, network communication can travel a shorter distance without using superfluous routers.

The complete question is:

What is the first Valid host on the subnetwork that the node 172.19.49.43/21 belongs to?

a) 172.19.48.1

b) 172.19.48.3

c) 172.19.48.255

d) 172.19.48.0 2.

To learn more about subnetwork, refer to:

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