Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?

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Q1

A client-server system uses a satellite network, with the satellite at a height of 40,000 km. What is the

best-case delay in response to a request?

4 * (40.000)/(3*10^5) =0.533 sec

533 msec.

Q2

A system has an 7 layer protocol hierarchy. Applications generate messages of length M bytes. At each of the layers, an h-byte header is added. What fraction of the network bandwidth is filled with headers?

7*20=140byte


Totoal

1024+140=1164byte


140/1164=12%

Q3

An image is 1600 × 1200 pixels with 3 bytes/pixel. Assume the image is

uncompressed. How long does it take to transmit it over a 56-kbps modem channel?

Over a 1-Mbps cable modem? Over a 10-Mbps Ethernet? Over 100-Mbps Ethernet?

Over gigabit Ethernet?

56-kbps

(1600*900*3*8)/(56000)=617.14

1-Mbps

(1600*900*3*8)/(10^6)=34.56

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