EE450-SampleI-Nazarian-Summer11

EE450-SampleI-Nazarian-Summer11 - EE 450 Sample Exam I...

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EE 450 Sample Exam I Nazarian IMPORTANT: SHOW YOUR WORK. Perfect: 80, Max possible: 85 55 minutes 1) Short Answer (22 points + 3 extra credit points) a) (1 pt) Sohrab is monitoring the bit error rate on an 802.11 wireless channel to see it suddenly increasing. He is thinking of increasing the bit duration at the transmitter node to reduce the overall bit error rate. This may work. True/False b) (1 pt) It is a device that is used to connect your computer to a telephone line. i. MODEM ii. Bridge iii. Router iv. Gateway v. Hub c) (2 pts) Host A transmits a 10-bit message of 1001001001 destined to Host B on an Ethernet bus. Host B receives the data with no error, however Host C receives the message with one bit of error as 1001001011. i. Host C can go ahead and drop the message at its physical layer, because the message is not destined to it. ii. It is still likely Host C finds no error with the message and passes it to its Network Layer to find out the message is not destined to it. iii. The physical layer of Host C has not done its functionality properly. iv. Two items out of i, ii, and iii are correct. v. None of the above d) (2 pts) A hub cannot recognize an IP address, however it is able to understand MAC addresses when connected to an Ethernet link. True/False e) (2 pts) Physical layer is responsible for clock synchronization, code conversion and data compression. True/False f) (3 extra credit pts) The magically elected President Ahmadinejad says when he delivered his speech at
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EE450-SampleI-Nazarian-Summer11 - EE 450 Sample Exam I...

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