Question

If a communication line has an attenuation of -10dB, a transmitted with a power of 5W becomes reaches the end of the line. when it 50W 1w 5W 0.5W 10W

Answer 1

1 . attenuation in dB= 10*log₁₀(Pi/Pout)

Pi-Input Power

Pout -Output power

so -10dB=10*log₁₀(5/Pout)

5/Pout = 10^-1

Pout =5*10 =50W.

2. Forwarding Table is used for every router which tells the router how to process a packet.In priority scheduling highest priority packet is send in the router . Forwarding table tells how a packet or frame will be forwarded and therefore it will send the highest priority packet first in priority scheduling.

3. Frequency is 1.

In simplex there is only one way transmission between 2 parties so frequency number is 1.

A full duplex modem uses 2 frequencies because there is both way transimission . Sending and receiving can be simultaneous here.