MONTEGO BAY COMMUNITY COLLEGE ADMISI
FIRST SEMESTER EXAMINATION 
SUBJECT: Data Communication & Networks 
SECT/ONA 
Answer ALL questions in this section. 
ANSWER ALL QUESTIONS. 
1. 	Computer communication describes 
a)	A process by which a super computer is connected to several terminals 
b)	A process by which a single CPU has several terminals attached to it 
c)	A process in which two or more computers or devices transfer data or instructions and information. 
d)	A series of digital connections leased from a telephone company. 
2.	The difference between a chat room and a news group is that chat room: a. is an area on the web where users conduct written discussions about a 
particular subject 
b.	is a live conversation 
c.	is asynchronous 
d. enables users to communicate only by email to each other 
3.	In a star network all computers are connected 
a.	To a central device 
b.	To a token 
c.	In a Bus arrangement 
d.	To each other 
	4. 	This is a worldwide collection of networks that link millions of businesses, 
government agencies, educational institutions, and individuals. a. Web 
b. Internet 
c.	E-mail 
d.	Chat Rooms 
5.	Sometimes called Voice over IP (VoIP), this enables users to talk to other users over the internet. 
a.	Web services 
b.	Instant Messaging 
c.	Internet telephony 
d.	Collaboration 
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6.	In the client/server network, the: 
a.	server sends a request and receives a reply from the client 
b.	client sends a reply and receives a request from the server 
c.	client sends a request and receives a reply from the server 
d.	server sends a request after receiving a reply from the client 
7.	Which of the following is NOT true about a star network when a workstation fails? 
a.	all other devices in the network are affected 
b.	the entire network is unaffected 
c.	only that device is affected 
d.	the hub is not affected 
8.	Which of the following is true about a token-ring LAN? 
a.	devices can send data all at once. 
b.	more than one token exist in the network 
c.	only one device at anyone time can hold the token 
d.	collisions do occur 
9.	Which of 'the following conversion is performed by a modern when receiving 
signals over standard telephone lines? 
a.	analog -> digital -> analog 
b.	digital -> analog 
c.	digital -> analog -> digital 
d.	analog -> digital 
10. 	A public location inwhich people may connect wirelessly to the internet using 
their mobile computer or devices is called 
a.	cybercafe 
b.	Internet access point 
c.	Groupware 
d. Public Collaboration 
11. 	Sending text messages with picture messaging is also known as 
a. SMS b.IM 
c.	MMS 
d.	Wireless Messaging Services 
12. 	This is a network that covers a large geographical area such as a country or the 
world using communications channel that combines many types of media. 
a.	WAN 
b.	MAN 
c.	LAN 
d.	SAN 
13. 	This is a simple, inexpensive network that typically connects less than 10 
computers 
a)	P2P 
b)	Peer-to-Peer 
c)	Client/Server 
d)	All of the Above 
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14.	Network topology refers to 
a)	The layout of a Ring network 
b)	The bus network and the use of its tokens 
c)	The star topology in which the central bus is important 
d)	The structure of the network. 
15.	This type of network technology allows nodes to contend for access to the network. 
a)	Token Ring 
b)	TCP/IP 
c)	802.11 
d)	Ethernet 
16.	This is referred to as the time it takes for a signal to travel from one location to another on a network 
a)	Bandwidth 
b)	Baseband 
c)	Delay 
d)	Latency 
17.	The rules that govern how data is transmitted in a communications network are called 
a)	Protocols 
b)	Network Operating System 
	c) 	Services 
	d) 	Media 
18.	This Ethernet standard has a data transfer rate of 100 Mbps a) Legacy 
-b) Fast Ethernet 
c)	Gigabit Ethernet 
d)	10-gigabit Ethernet 
19.	This technology uses radio signals to communicate with a tag placed in an object, an animal or a person. 
a)	WAP 
b)	IrDA 
c)	RFID 
d)	Bluetooth 
20.	Which of the following is used to describe the rated throughput capacity of a given network medium? 
a)	Bandwidth 
b)	baseband 
c)	Delay 
	d) 	Latency 
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21. 	This a temporary connection that uses one or more analog telephone lines for 
communication 
	a) 	ISDN 
b) DSL 
c)	Dial-up lines 
d)	T -carrier lines 
22.	These consist of materials or substances capable of carrying one or more signals. 
A.	bandwidth 
B.	Transmission media 
C.	Latency 
D.	Analog signals 
23.	Which kind of cable does a 10 Base 2 network use? 
A.	ThinNet 
B.	ThickNet 
C.	Fiber-Optic 
D.	Unshielded Twisted Pair (UTP) 
24.	What device is used to connect the computers to a network? 
a.	BNIC 
b.	NIS 
c.	NIC 
d.	BNC 
25.	What will occur if the terminators are removed from a bus network? 
a.	Slower network data transmission 
b.	Cross talk 
c.	Collision 
d.	Signal Bounce 
26.	The acronym UPS stands for 
a.	Upgrade Packet Switch 
b.	Unfamiliar Password Sequence 
c.	Uninterrupted Power Supply 
d.	User Polling Sequence 
27.	Which cable is least susceptible to Electro Magnetic Interference (EMI)? 
a.	Fiber Optic 
b.	Shielded Twisted Pair 
c.	Unshielded Twisted Pair 
d.	Coaxial 
28.	Which methods of dialog control provides two-way communications simultaneously? 
a.	Single-Plex 
b.	Half-Duplex 
c.	Full Duplex 
d.	Simplex 
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	29. 	This protocol allows wireless mobile devices such as smart phones and PDAs to 
access the internet and its services. 
a.	RFID 
b.	IrDA 
c.	WAP 
d.	TCP/IP 
30.	Each network card has its own unique code, called a 
a.	PC card 
b.	AT motherboard 
c.	IP address 
d.	MAC address 
31. 	allows users to share documents with others in real time. 
a.	An online meeting 
b.	Internet Printing 
c.	Voice mail 
d.	Internet Telephony 
32.	Most businesses use a standard, such as __ ' that defines how data transmits across telephone 
lines or other means. 
a.	PCS (Personal Communications Services) 
b.	EFT (Electronic Funds Transfer) 
c.	PDS (Public Data Services) 
d.	EDI (Electronic Data Interchange) 
33. 	A file server is a dedicated server that 
a.	Stores and manages files 
b.	Manages printers and print jobs 
c.	Stores and provides access to a database 
d.	Manages network traffic (activity) 
34. 	A print server is a dedicated server that __ . 
	a. 	Stores and manages files 
b.	Manages printers and print jobs 
c.	Stores and provides access to a database 
d.	Manages network traffic 
35. 	A database server is a dedicated server that 
a.	Stores and manages files 
b.	Manages printers and print jobs 
c.	Stores and provides access to a database 
d.	Manages network traffic 
36.	The design of computers, devices, and media in a network, sometimes called the __ ' is 
categorized as either client/server or peer-to-peer. a network topology 
b network protocol 
c network architecture d network technology 
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37.	__ is the most popular LAN technology because it is relatively inexpensive and easy to install 
and maintain. 
a Ethernet b 802.11 
c TCP/IP 
d token ring 
38. 	Internet transmissions commonly use __ . 
a Ethernet b token ring c 802.11 
d TCP/IP 
39. 	When a computer sends data over the Internet, the data is divided into small pieces, or __ . 
a Bundles b Packets c Slices 
d baskets 
	40. 	These consists of individual electrical pulses that represents hits grouped together 
into bytes. 
a.	Digital signals 
b.	Analog signals 
c.	Latency 
d.	Bandwidth 
41.	This device accepts the transmission of data, instructions and information. 
a.	sending device 
b.	communications device 
c.	receiving device 
d.	communications channel 
42.	Another name i()r a concentrator is 
a.	Attenuation and noise 
b.	Physical and logical connection 
c.	Bridge and repeater 
d.	Hubs and switches 
43. Which type of interface transmit more than one bit at a time 
a.	Parallel port 
b.	Peer-to-peer 
c.	Serial port 
d.	On-screen keyboard 
44. What is the hexadecimal equivalent of the binary number 11001110'1 
a.	A9 
b.	CE 
c.	AE 
d.	CF 
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3.	
Section B 
Instruction: 	Answer any two questions from this section 
Question 1 
a. There are two types of public Internet Access Points. Explain each. 
(4 marks) 
b.	For successful communications to take place four main components must be in place. Name and explain each 
(4 marks) 
c.	Distinguish between digital and analog signals. Draw a diagram of each 
	signal. 	( 4 marks) 
d.	There are many services on the Internet. Name and explain any four (4) types (8 marks) 
QUESTION 2 
a)	Define the term Protocols? 	(2marks) 
b)	Name and explain the protocol used by the: i. Internet 
	ii. A Local Area Network 	(6marks) 
c) Discuss the impact of modern technology in business with regard to the following: i. E-mail 
11. Telemarketing 
111. Electronic Funds Transfer 
	IV. Teleconferencing 	(12marks) 
Question 3 
a. Name and explain t\vo (2) type of LAN network communications standard. (8 marks) 
b. Name 1:\vo types of networking architectures and differentiate between them. (S marks) 
c.	Give an advantage and a disadvantage of both the twisted pair and fiber optic 
	cables. 	(4 marks) 
QUESTION 4 
Explain the following terms, giving examples where possible 
a)	FTP server 
b)	Front End Processor 
c)	GPRS 
d)	Concentrator 
e)	IP address 
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45. Which type of transmission media transmits data the fastest? 
a.	Twisted pair 
b.	Co-axial cable 
c.	Fiber optic cable 
d.	\Vire1ess LAN 
46.	The technique of breaking a message into individual packets, sending the packets along the 
best route available, and then reassembling the data is called __ . a packet catching 
b packet building 
c packet switching 
d packet swapping 
47.	Microwave transmission, sometimes called __ ' involves sending signals from one microwave 
station to another. 
a line-of-sight transmission b flexed-point wireless 
c out-of-sight transmission d fixed-point wireless 
48. 	Physical transmission media used in communications include all of the following except __ . 
a twisted-pair cable b coaxial cable 
c broadcast radio cable d fiber-optic cable 
49. 	__ is an electrical disturbance that can degrade communications. 
a Latency b Noise 
c Coax 
d Hub 
50. 	For best performance of a communications channel, __ . 
a bandwidth and latency should be low 
b bandwidth should be low and latency high c bandwidth should be high and latency low d bandwidth and latency should be high 
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