Anetwork design engineer has been asked to design the ip addressing scheme for a customer network. the network will use ip addresses from the 192.168.30.0/24 network. the engineer allocates 254 ip addresses for the hosts on the network but excludes 192.168.30.0/24 and 192.168.30.255/24 ip addresses. why must the engineer exclude these two ip addresses?

192.168.30.0/24 is the network IP address and 192.168.30.255/24 is the IP broadcast  address.

Explanation:

The first IP (192.168.30.0/24) address of your subnet is the network address,  the last IP (192.168.30.255/24) address of your subnet is your broadcast address and the available usable IP addresses in your subnet are subnet size -2, because network address and broadcast address cannot be allocated to a system.