What is referred to as the list of valid IP addresses available for assignment within a specific subnet?

The term that describes the list of valid IP addresses available for assignment within a specific subnet is referred to as a "Scope." In networking, a scope specifically refers to a range of IP addresses that a DHCP (Dynamic Host Configuration Protocol) server is authorized to allocate to devices on a particular subnet.

When a device connects to the network, the DHCP server uses the scope to provide it with an IP address, subnet mask, default gateway, and other network configuration details. This ensures that addresses assigned are unique and prevents conflicts with other devices on the network.

In contrast, the other terms relate to different aspects of networking. A password pertains to security access controls rather than IP address allocation. A network mask defines the subnet within which the IP addresses work but does not enumerate the addresses themselves. A gateway is a node that serves as an access point to another network and is also not a list of IPs but rather a specific address that routes traffic to or from a network. Understanding these definitions is crucial for effective network management and configuration.