Where is the Start Frame Delimiter (SFD) found in an ethernet frame?

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.

List a few alternative options and input and output over the standerd keyboard and monitor. explain their functioning in details.

The song about casey jones a railroad engineer who gives his life on the job would most likely gall under the folk song category of? a-work song b-nonsense song c-religious song d-ballad