ARP is considered in the boundary between the link and network layers

ARP

If at time = 3 causal signal multiplies with Gama signal (Energy value = 10) then the result energy signal equal:

A router is a layer-3 packet switch

ٌRouters have a larger per-packet processing time than switches,

Forwarding is determining whether a frame should be forwarded to some interface or should just be dropped.

Forwarding is determining the interfaces to which a frame should be directed, and then moves the frame to those interfaces.

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