Computer Networks MIS420/520 NAME_______________

Fall 1997 FINAL EXAM Dr. Wayne Summers

Read each question carefully before you answer. Work at a steady pace, and you should have ample time to finish. Make sure your name is on your paper before you turn it in.

I. Multiple Choice: Write the letter of the best answer.

_______ 1. To download a file means to:

a) send data electronically from your terminal to another computer

b) remove all control characters

c) receive data electronically from another computer to your terminal/computer

d) automatically dial your telephone number

_______ 2. The set of rules governing the flow of information in a network is called

a) encryption b) multiplexing

b) protocol d) modem menu

e) packet switching

_______ 3. A major advantage of fiber-optic transmission is its

a) sensitivity b) bandwidth

c) low cost d) ease of installation

e) all of these

______ 4. The device that determines the most efficient path to transmit messages in a network and then sends the data along that path

a) gateway b) router

c) bridge d) repeater

e) none of these

______5. Which of the following is not a layer in the OSI reference model:

a) Application b) Media Access

c) Session d) Presentation

e) Transport

_____ 6. In the ______ topology, each node has equal access to a single line, much like a highway.

a) star b) ring

c) bus d) tree

e) mesh

_____ 7. Which of the following is a reason for using a CSU/DSU instead of a modem?

a) change from dial-up to leased line service b) cheaper

c) change from analog to digital service d) Dynamic Speed Shifts

_____ 8. A ring and a bus are examples of

a) LAN capacity b) LAN protocol

c) LAN topology d) intelligence electronics

_____ 9. The media type is determined at the __________ Layer of the OSI model

a) Physical b) Data Link

c) Network d) Transport

e) None of these

_____ 10. The device which connects two or more segments in a LAN in order to improve the efficiency of the network is called a

a) gateway b) router

c) bridge d) repeater

e) none of these

_____ 11. Which of the following is a reason for networking computers?

a) sharing hardware resources b) sharing files

c) sharing software d) e-mailing

e) all of these f) none of these

_____ 12. Which of the following are common network mistakes?

1. Unplugging a cable from a computer
2. Sending something to the printer again when it didn't seem to print
3. Thinking you can't work just because the network in down

a) i & ii b) i & iii c) ii & iii d) all of these e) none of these

_____ 13. Which of the following are networking commandments?

1. back up your hard disk religiously
2. guard against computer viruses
3. train the users in how to use the network

a) i & ii b) i & iii c) ii & iii d) all of these e) none of these

_____ 14. Which of the following should be kept handy by network managers?

1. punchdown tools and wire cutters
2. patch cables
3. network manuals

a) i & ii b) i & iii c) ii & iii d) all of these e) none of these

_____ 15. The Macintosh's built-in network feature is:

a) AppleTalk b) LocalTalk

c) PhoneNET d) Ethernet

e) Token Ring

II. Matching :Write the letter of the term or acronym described below:

A. network B. modem C. BNC D. Windows for WorkGroups

E. LAN F. CSU/DSU G. node H. coaxial

I. CSMA/CD J. ATM K. fiber-optic L. twisted-pair

M. RJ-45 N. EDI O. VAN P. ISDN

Q. WAN R. Internet S. Frame relay T. DNS

_______ 16. Device that converts analog signals to digital and back.

_______ 17. Connector used with UTP.

_______ 18. Integration of computer systems, workstations and communications links.

_______ 19. Ethernet

_______ 20. Each computer on a LAN

_______ 21. Wide-area network linking computers around the world.

_______ 22. Using computers and data communications to transmit data electronically between companies.

_______ 23. Application protocol used in TCP/IP to map symbolic names used by humans into the equivalent fully qualified network address

_______ 24. Fast packet switching that uses fixed length "packets"

_______ 25. Used in Peer-to-Peer networks

III. Matching: Write the letter of the equipment or wiring that would be used in the following situations:

A. repeater B. router C. bridge D. gateway

E. hub F. Thinnet G. Thick Ethernet H. STP

I. UTP K. fiber-optic

_____ 26. You been asked to install 10Base2.

_____ 27. You want to connect your LAN to the Internet.

_____ 28. You need a reliable and secure cabling system.

_____ 29. You need a device to connect computers which use unshielded twisted pairs wiring

._____ 30. You need to cheaply extend the distance of your LAN to a room greater than 500 m away.

IV. Answer completely the following questions.

31. You are interviewing for a job as a communications manager for ABC Corp., a small manufacturing company in Albuquerque. The interviewer notices that you have taken a course in Computer Networks. He asks you to answer the following questions.

a) Describe five important concepts that you have learned in the course. (15 pts)

i)

ii)

iii)

iv)

v)

b) In what areas of computer networks do you need further training? (5 pts)

c) The interviewer also notices that you have studied Microsoft's Windows and Novell's Netware. (20 pts)

i) What are these two products and how do they differ?

ii) You mentioned that you have been exposed three different versions of Windows. Briefly, describe the differences between the three versions of Windows that you have seen

d. Currently ABC Corp. uses a solitary IBM minicomputer with 10 terminals used primarily for standard data processing applications. Each of their five departments has 2-5 PCs used mainly for word-processing and spreadsheet applications. Describe how computer networks can make his company more competitive in the near future.

(10 pts)

32. a) Describe what hardware is needed for a Netday and how each is used.(10 pts)

b) Describe ways that the quality of education for students in the public schools in Las Vegas, NM., have been improved by using computer networks. What else can be done? (10 pts)

33. Your restaurant in Las Vegas has expanded by opening up two branches in Taos and Santa Fe. You want to link the inventory and daily sales records of the three stores together.

1. What is needed to connect your three stores?

 

 

 

 

 

 

 

 

2. Describe circumstances in which a leased line would be preferred to a dial-up line.

34. Draw a model of the OSI model matching internetworking devices and protocols to the corresponding OSI layer.
36. The Mora School District wants to access the Internet in the classrooms. Discuss the various options they have for connecting to the Internet. Select the "best" option for them and write a brief rationale for why they should use your option.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37. a) Give an example of a peer-to-peer network.

 

 

b) Give an example of a client-server network.

 

 

c) What is the difference between a peer-to-peer network and a client-server network?

 

 

 

d) When would you use a peer-to-peer network?

 

 

 

e) When would you use a client-server network?

 

 

 

38. You've just tried to install a computer running Windows 95 on the Internet. When you try to execute Netscape and Telnet, they do not work. List some of the things you would check? How would you fix the problem?

38.

a) What exactly does an NIC do?

42. Your boss has just read an article about EDI and although he doesn't know what it is, thinks the company should use it.

a) Explain to your boss what EDI is in simple terms that he can understand.

b) Describe some of the benefits of EDI to your boss.

1. Explain some concerns you might have about using EDI in your company.

BONUS: You been asked to help redesign this course (Computer Networks): (5 pts)

a. Describe briefly which Computer Networking topic you would leave out.

b. Describe briefly which Networking topic you would include that was not covered in class or should have been covered more.