What subnet mask adjustment allows for more host addresses while ensuring segregation for different departments?

The choice of subnet mask directly influences the number of host addresses available within a subnet and aids in logically segmenting a network for different departments. In this context, a subnet mask of 255.255.255.128 allocates a range of host addresses larger than that of a /25 network, which is the subnetting configuration provided by this mask.

With a subnet mask of 255.255.255.128, you achieve a division of the network into two subnets, each capable of supporting up to 126 usable host addresses (considering that two addresses are reserved for the network and broadcast). This arrangement ensures effective separation of departmental networks while maximizing the number of available addresses for hosts.

The balance between having enough addresses for hosts and maintaining necessary segregation for different departments is particularly important in a scenario where multiple departments may need their own subnet for efficient communication and security purposes. Thus, choosing this subnet mask promotes both scalability and the organization of resources within the network.

In contrast, other subnet masks like 255.255.255.0 would allow a larger pool of addresses (up to 254 usable hosts) but would not provide distinct subnets for different departments, potentially resulting in unnecessary broadcast traffic. Masks such as 255.255.