Answer :
A valid default gateway for a host on the 10.1.100.0/24 network would be any IP address within the 10.1.100.0/24 subnet, except for the network address (10.1.100.0) and broadcast address (10.1.100.255).
In other words, any IP address in the range of 10.1.100.1 to 10.1.100.254 could be a valid default gateway for a host on this network.
The default gateway is the IP address of the router that a host uses to send packets to destinations outside of its own network. The router serves as a gateway or a doorway to other networks. It is important for hosts to have a valid default gateway configured in order to communicate with other networks.
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