Final answer:
A switch is the network device that directs network traffic by connecting devices and using packet switching to send data to the correct destination. Therefore correct answer is option b.
Step-by-step explanation:
The network device that directs network traffic is a switch. A switch operates at the data link layer of the OSI model and is used to connect devices on a computer network by using packet switching to receive, process, and forward data to the destination device. It differs from a hub in that it only sends the data to the device that needs it, rather than broadcasting the data out of all of its ports.
A node refers to an electronic device that is attached to a network and is capable of creating, receiving, or transmitting information over a communications channel. A Network Interface Card (NIC) is a hardware component that connects a computer to a network. Finally, a repeater is a network device that regenerates or replicates a signal as it passes between segments of a network to extend the distance over which the signal can travel.