These statements describe a network server.

assigns MACs
manages network resources
provides network security
translates data sent between networks

The statement that describes a network server is:

manages network resources

Explanation:

A server is a computer built and programmed to fulfill network needs. They might be able to perform regular computer tasks, but they are designed specially to connect several computers, create a space those computers can share, provide connectivity management to them and be able to receive, send, create, and copy data inside that network. In other words, it creates a space of interaction, allows interaction, and transfer data from this network to other networks and from other networks for its managed network.