How is the Performance?
first packet bit transmitted, t = 0
last packet bit transmitted, t = L / R
L = Length of packet
R = Bandwidth of Link
first packet bit arrives
last packet bit arrives, send ACK
ACK arrives, send next
packet, t =
EEL 4781: Computer Communication Networks
Due: Oct 18, 1:30 PM; 15% of the semester grade
Provide precise answers below the questions.
All questions carry equal points
What are the advantages of layering the network protocol stack?
2. A noiseless 4-kI-Iz channel is sampled every I msec. What is the maximum data rate?
How does the maximum data rate change if the channel is noisy, with a signal-to-noise
ratio of 30 dB?
3. Television channels are 6 MHz wide. How man,r bitsfsec
tE. Whet ie the minimum bandwidth needed to eett'tem a date rete ef hitet'eee if
the e'tgnel is transmitted using NR2. ltHLTrBr and Manchester eneedirt . ' r a!)
[I ' 'tie etel F _
04: -'-G" .42. MML'LB egg. "'-
r " . .- ttr)
_ - . Him L53- _