If t is multiplied by negative number means that the signal is expanded

Packet switching is more complex, less efficient, and more costly to implement than circuit switching.

if we have a signal with size = 2 multiplied by unit step signal at t =0 then the size of output signal equals

Absolute Bandwidth is a Narrow band of frequencies containing most energy

DNS resolves an IP address to a MAC address

All Ethernet technologies provide reliable and connectionless service to the network layer

resolves host names to IP addresses

Repeater device operates in ...... layer

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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