Class,

Below is a list of possible questions from Chap.s 6-8 that could be on the exam.

In addition to these, I recommend looking at the homework problems, the quizzes from this semester and last summer, and last year's exam.
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Topics that may be covered on the ECE3076 Exam

Chap. 6, Wireless

What is a wireless: link, node, access-point (WAP), WAP association, ad hoc network CDMA, CDMA/CA (how does CA work?).

What is the "CS" in CSMA?  "MA"?
How does CA handle the "hidden transmitter problem"?
What extra address (besides the normal Ethernet addresses) is in the WiFi header?  
On what links is this address seen?

Explain the cellular multiplexing techniques: FDMA, CDMA, TDMA

What is GSM, 2G, 2.5G, 3G (different cellular technology generations)

What is a "handoff", "home agent", "foreign agent", "mobile host", "correspondent", direct and indirect forwarding?

What are the range and bit rates for WiFi (802.11), Bluetooth (802.15), WiMax

Chapter 7, Multimedia

If the average network delay is 4 milliseconds (mS), the minimum is 3 ms and the maximum is 5 ms: what is the smallest replay delay that can be used, what is the minimum size "playback buffer" (in ms)?

How large is a 10 ms playback buffer (in bytes) if the audio is streaming at 12 kBits/sec.?

What are he advantages and disadvantages of using TCP and UDP for streaming audio?

How do the Web browser and the "media player" work together to play Web audio content?

How does a media player application know the a datagram was dropped?

What is the cost of adding FEC to the stream?  What problem is reduced by "interleaving"?

What function is done by SIP and H.323?

What two areas are improved by using a "Content Distributed Network" (CDN)?

What is QoS? "Policing" "Priority Queuing"?

Chapter 8 - Security

What are the four aspects of Network Security (think C.A.I.A.: Confidentiality, Authentication, Integrity, Availability)?

Name a type of attack against each aspect (e.g., Man-in-the Middle, Replay, Denial-of-Service, Content-Modification).

What techniques protect Confidentiality, Authentication, Integrity?

What are the relative advantages of "symmetric key encryption" and "public-private key encryption"?

What keys are used by Bob and Alice, for Bob to send Alice a secure message by either technique?

What is a "nonce"?  Why is it used?

What is a man-in-the-middle attack?  When is it used?  How can it be prevented?

What is guaranteed by a valid digital signature?

What is a "secure hash", a "message digest", a "Digital signature"?

What is a "Key Distribution Center"?  Why would you need one?

What are "certificate authorities" (what do they do)?

How do authenticate Amazon.com?  How does Amazon.com authenticate you?

What is a (host-based, network) firewall?  What does it prevent?

Explain each of the five steps of network hacking (Reconnaissance (mapping), compromise, elevate privileges, root kit, exploit).

Why are SSL and TLS used for HTTPS and secure email respectively?

What service does PGP and GPG provide?

What service does IPsec's AH and ESP modes provide?

Why is WiFi's (802.11a/b/g) security inadequate?  What is WEP and WPA?


Answers are in the slide set "Exam Review.ppt" and the textbook.
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John Copeland
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ECE3076 Class Web Site: http://www.csc.gatech.edu/copeland/jac/3076/