Final answer:
Terminators are used in computer networks to prevent signal reflections in certain topologies, such as bus or linear networks. They absorb and terminate the signal, improving network performance.
Step-by-step explanation:
Terminators, in the context of computer networks, are devices or components that are used to prevent signal reflections or echoes in certain types of network topologies. These terminators are usually resistors that are connected at the end of a network segment to absorb and terminate the signal. They help to eliminate signal distortions and improve the overall network performance.
For example, in Ethernet networks, terminators are used in bus or linear topologies like 10Base2 or 10Base5. These terminators, also known as terminators resistors, are connected at the end of the coaxial cable to absorb the signals and prevent them from reflecting back and causing interference.