371-HW2
Monday, 12 February 2024
8:50 PM
Calculate the nodal delay in milliseconds (ms) for a single 5000-byte packet when the node bit rate is 1
Mbps, the optical link distance is 2000-km, the average queuing delay is 6 ms, and the average
processing delay is 5 ms. Round your answer to the nearest integer. •
The nodal delay in
milliseconds is ms.
The nodal delay= Propagation delay + Transmission delay+ queuing delay+
processing delay
T_prop = Distance (X) / C (Wirless OR Wired)
T_transmit = Length of packet (L_p) / Bit Rate (R_b)
Comp Netw Lab Page 1
An institution uses web caching to reduce the response time for web requests. The average delays in
milliseconds (ms) for a request-response pair in the LAN, the access link, and the Internet are 10-ms, 20ms, and 200-ms, respectively. The web cache hit rate is 80%. Calculate the average response time in
milliseconds for this institution's web requests.
Comp Netw Lab Page 2
A client (C) requests a web page from a server (S). The web page has 7 identical objects,
inclusive of the base HTML file, each of which is 5-Megabit in size. The round-trip time
between C and S is 10 milliseconds. The transmission bit rates of C and S are 800 Mbps and
8 Mbps, respectively. Calculate, in milliseconds, the total time it takes to download the web
page for these three cases. Round your answers to the nearest integer.
•
Using HTTP1.0, the total time is ms.
•
Using HTTP1.1 without pipelining, the total time is ms.
•
Using HTTP1.1 with pipelining, the total time is ms.
○
[ obj] =
(2
+ tr)
○ Without pipelining: [ obj] =
+ (
○ With pipelining : [ obj] ≈ 2
+
Comp Netw Lab Page 3
+ tr)
tr