CompTIA Cloud+ Practice Test

What additional devices may require IP address assignments in Hank’s designed /28 subnet?

1. Default gateway

2. API

3. Named users

4. SNMP

The correct answer is: Default gateway

In a subnet designed with a /28 prefix, there are 16 IP addresses available. This includes addresses for host devices as well as administrative purposes such as defining a default gateway. The default gateway is a crucial component in a network; it is the device (often a router) that forwards requests from devices in the subnet to destinations outside the subnet. Without assigning an IP address to the default gateway within the subnet, devices would be unable to communicate with devices outside of their own subnet, limiting network connectivity. However, the other options, while they may require IP address assignments in certain contexts, are more specialized or less likely to be a necessity for basic subnet functions. An API can represent application programming interfaces that may not have dedicated IP addresses unless used in a specific service architecture. Named users typically refer to accounts rather than devices requiring an IP address. SNMP (Simple Network Management Protocol) is used for network management and monitoring, but it also often communicates through existing IP addresses rather than needing separate assignments. Thus, the additional device that must definitely have an IP address assignment in Hank's /28 subnet is the default gateway, ensuring that communication can flow between the local network and external networks.