What protocol do most devices currently use at the network layer?

A911 dispatcher is the sole sender of messages to all police officers. while on patrol, officers communicate with the dispatcher who, in turn, relays messages to other officers. the officers do not communicate directly with one another. this illustrates a network.

Learning sign language is an example of a(n) learning sign language is an example of a(n)

Need fast im timed in a paragraph of 125 words, explain at least three ways that engineers explore possible solutions in their projects.