Question: computer network and cybersecurity What are two reasons for using layered protocols? What is one possible disadvantage of using layered protocols? Besides bandwidth and latency,

computer network and cybersecurity

What are two reasons for using layered protocols? What is one possible disadvantage of using layered protocols?

Besides bandwidth and latency, what other parameter is needed to give a good characterisation of the quality of service offered by a network used for

(i) digitised voice traffic?

(ii) video traffic?

(iii) financial transaction traffic?

A factor in the delay of a store-and-forward packet-switching system is how long it takes to store and forward a packet through a switch. If switching time is 10 sec, is this likely to be a major factor in the response of a client-server system where the client is in Broome and the server is in Melbourne? Assume the propagation speed in copper and fibre to be 2/3 the speed of light in vacuum.

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