A network connection is congested because of which there are multiple network fluctuations and latency issues. You as a network administrator plan on solving this issue by using a network device to send signals to the sender or receiver of the data packets that the network is congested. Which one of the following will you use in this scenario?

a$.$

Implicit signaling

b$.$

Backpressure

c$.$

Admission policy

d$.$

Explicit signaling