In ASK if binary = 0 then equation is

In FSK if binary = 0 then equation is

In half duplex, signals are transmitted in only one direction

If we have 1 Mb/s link, and each user need to be active 100Kb/s in 10% suppose there are 35 users. Find the probability that at any given time, exactly 10 users are transmitting simultaneously?

collision detection easy in wired and wireless

بدل ما تقعد فاضي :
when BER increases then SNR decreases

Signal attenuation decreases with the length of the channel.

Routers are used o connect individual LANs with each other.

Presentation layer is used for encryption and compression (مهم)

Mac address is used in ............ layer(امتحان 2023)

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