Question

which network device provides multiple ports for connecting nodes and is aware of the exact address or identity of all the nodes attached to it?
a hub
b repeater
c switch
d gateway

Explanation:

A hub is a simple device that broadcasts data to all connected nodes without knowing their addresses. A repeater amplifies signals. A gateway connects different networks. A switch, however, has multiple ports, and it uses MAC addresses to send data directly to the intended node, being aware of the addresses of attached nodes.

Answer:

C. Switch