You have been given the task of configuring IPv4 subnets for a new branch office. You examine the documentation for A. Datum’s network and determine that the next available subnet is 172.16.24.0/21. What is the first IPv4 host address that you can assign in this subnet?
172.16.24.0/21 uses 21 bits for the subnet mask. This means that the mask, expressed in decimal, is 255.255.248.0. Consequently, the first subnet ID is 172.16.8.0, the next is 172.16.16.0, the third is 172.16.24.0, and the fourth is 172.16.32.0. The first host in a subnet is 1 binary digit higher than the subnet ID. Therefore, the first host in 172.16.24.0/21 is 172.16.24.1/21.