Which type of server is BEST suited for IP management in a lab network consisting of 45 computers and a file server?

The best choice for managing IP addresses in a network with multiple computers is Dynamic Host Configuration Protocol (DHCP). DHCP is specifically designed to automate the process of assigning IP addresses to devices within a network. This helps to eliminate the need for manual configurations for each of the 45 computers in the lab, allowing them to automatically receive their network settings, including IP address, subnet mask, default gateway, and DNS servers.

In a typical lab environment where devices need to connect to a file server and possibly other resources, using DHCP enhances efficiency and reduces the potential for human error during IP address assignment. It also simplifies network management since DHCP servers keep track of which IP addresses have been assigned and can automatically recycle addresses as devices join or leave the network.

The other options are more suited for different purposes. For instance, Domain Name Service (DNS) translates domain names into IP addresses rather than managing IP address assignments, while Windows Internet Naming Services (WINS) is used for NetBIOS name resolution in Windows networks, which isn't directly related to IP management. Routing and Remote Access serves functions related to network routing and secure connectivity rather than IP address assignment. Thus, DHCP stands out as the most appropriate choice for the scenario presented.