Total of 50 marks. Answer the following questions. Show your work for any
Treat this assignment as an open-book individual exam. You may consult any of
your class notes or other books or documents, paper or electronic. However, you
may NOT discuss questions or share answers with any other person until
after the assignment is due.
How much disk space is taken by a minute-long uncompressed digital stereo
audio file sampled at 11 KHz, 16 bits per sample? 
What do Manchester and Differential Manchester encoding have in common? Why do
they not just use a high voltage for 1 and a low voltage for 0? 
What are both 4 bit/5 bit and 5 bit/6 bit encoding designed to prevent? 
Give three differences between baseband and broadband communication. 
Give two advantages of conducted media and two advantages of radiated media.
What is the physical difference among the different types of radiated signals?
Which types of radiation tend to have the highest transmission speeds? 
What is a hot swappable component? What types of server components are most
likely to be hot swappable? 
What are three specific features you should look for when buying a network
List three components or devices that are particularly important to the
reliability of a server and therefore the network. 
What are the meanings of the three parts of the names of popular LAN standards
such as 10baseT and 1000baseSX? 
If NICs using p-persistent CSMA may transmit every 20 microseconds with
probability 0.2, what is the average wait before transmitting? 
In CSMA/CD binary exponential backoff,
If a collision is detected, the NIC will wait 0 to 1 slot times before
If another collision occurs, the NIC will wait 0 to 3 slot times.
If a third collision occurs, how long will the NIC wait? 
If collision detection requires listening and re-transmission, why is it used
more often than collision avoidance? 
What type of media access should be used for a small network with low
performance requirements? 
Why does a token bus have more complex token-passing algorithms than a token
What is the purpose of a MAC address? 
Why must IEEE 803.2 frames be at least 64 bytes? 
What part of the network software allows you to read or write to a file on the
network as if it were on the local PC? 
Give an advantage of disk mirroring over RAID and two advantages of RAID over
A system has full backups every week at the end of the day on Sunday.
At the end of each of the remaining six days, the system has a differential or
If a user discovers her file missing on Friday, at most how many backups would
need to be consulted to find the file
- if differential backups were used?
- if incremental backups were used? 
What type of site licence would be best to buy for
- an infrequently used software package to be installed on 100 computers?
- a heavily used software package in a large building with a variable number
of computers? 
Name the database of network objects used in
- Novell NetWare 3.x
- Novell NetWare 4.x
- Windows 2000 
Which networking protocol is built in and used by default in
- Novell NetWare?
- Windows 9x/NT?
- UNIX? 
- List two ways that users and computers are grouped in Windows.