Chapter-1
NETWORKING AND TELECOMMUNICATION
A. Multiple Choice
Questions (MCQs)
1.
Physical layout of a computer network:
- a.
Network
- b. LAN
- c. Topology ✔
- d. MAN
2. Which of the following is a protocol?
- a. TCP/IP
- b. FTP
- c. HTTP
- d. All of the above ✔
3. A networking device with multiple ports:
- a. HUB ✔
- b. MAN
- c. LAN
- d. WAN
4. Bandwidth is measured in:
- a. KBPS
- b. BPS ✔(Bits
Per Second)
- c. KPS
- d. None of the above
5. Which is an internet service?
- a. Telnet ✔
- b. Star
- c. Hub
- d. Ring
6. Which of the following is a network
topology?
- a. Star
- b. Bus
- c. Ring
- d. All of the above ✔
7. Newspaper and books are examples of:
- a. Half duplex
- b. Full Duplex
- c. Simplex ✔(One-way
communication)
- d. None of the above
8. One of the most expensive cables in
networking:
- a. Coaxial cable
- b. UTP
- c. STP
- d. Optical fiber cable ✔
9. Which of these domains is restricted to
qualified organizations?
- a. .com
- b. .org
- c. .net
- d. .edu ✔(Educational
institutions)
10. Yahoo! is a:
- a. Search engine ✔
- b. Web browser
- c. Home page
- d. Newsgroup
11. Which of the following is a valid E-mail
ID?
- a. dinesh@yahoo@com
- b. nayaghare.dinesh@com
- c. Dinesh@Yahoo.com
- d. dinesh.nayaghare@gmail.com ✔
12. Which of the following is a web browser?
- a. Internet Explorer
- b. Mozilla Firefox
- c. Opera
- d. All of the above ✔
13. The process of transferring a file from a
remote computer to the requesting computer is:
- a. Uploading
- b. Downloading ✔
- c. Searching
- d. File Transfer Protocol
14. ARPANET is related to:
- a. Internet ✔(Early
version of the internet)
- b. Operating System
- c. Microsoft Office
- d. Adobe Programs
15. Actual internet address is numerical and
is called:
- a. Domain Name
- b. IP address ✔
- c. DNS
- d. Domain Letter
16. Which of the following symbols is used in
email?
- a. #
- b. @ ✔
- c.
- d. +
17. The website contains:
- a. Dynamic pages
- b. Static Pages
- c. Both of the above ✔
- d. None of the above
18. Which of the following is a search
engine?
- a. google.com
- b. facebook.com
- c. ask.com
- d. both (a) and (c) ✔
B. Fill in the blanks with correct
words/phrases.
a.Transmission is the channel or physical
path through which the message is carried from sender to the receiver.
b.In a simplex transmission, the signal
is sent in one direction.
c.Unguided media is also called unbounded
media or wireless media.
d.Radio waves are a type of
electromagnetic radiation used in communication technologies, such as
television, mobile phones, and radios.
e.A router is a device that connects the
LAN to the internet. It connects two different networks having the same
protocol.
f.A driver is a software program that
controls a particular type of hardware device that is attached to the computer
network.
g.Topology refers to the physical shape
or design structure of a network, including the nodes, devices, and cables.
h.In ring topology, all the computers are
connected to each other in a closed loop with a single cable.
i.The Internet is the largest computer
network spread all over the world, connecting millions of computers.
j.Wi-Fi stands for Wireless Fidelity.
k.Search engines are used to search and retrieve
information.
l.The process of transferring information from
your computer to another computer through a network is called uploading.
m.Actual internet addresses are numerical and
called IP addresses.
n.The main page of any website should be named index.html(or
home.html/default.htmldepending on server settings).
o.In simplex communication, the message is
transmitted in only one direction.
p.In Half Duplex communication, the message can
be transmitted in both ways but not simultaneously.
q.Transmitting messages over a distance using
wired or wireless media is called data communication.
r.Digital signals have two amplitude levels
called 0 and 1(or binary states).
s.Telephone lines carry analog signals.
t.Modulation is the technique of
converting a digital signal to analog form.
u.A computer uses digital signals that
consist of ON/OFF pulses.
v.A modem's transmission speed is measured in bps
(bits per second).
w.Bandwidth is measured in Hz (Hertz)or bps
(bits per second).
x.A WAN (Wide Area Network) is the type
of network that covers a relatively larger geographical area.
y.One popular type of server-based network is
the client-server network.
z.In a star network, all nodes are connected to
a central device called a hub or switch.
aa.A centralized computer that allows multiple
remote users to share the same printing device is referred to as a print
server.
ab.The language network devices use is called a protocol.
ac.Guidedtransmission Media use
"cabling" system that guides the data signals along a specific path.
ad.Twisted pair cable normally consists of four
pairs of wires.
ae.STP (Shielded Twisted Pair) cables
offer much higher bandwidths than UTP cables.
af.An optical fiber is a thin strand of
glass that transmits pulsating beams of light at speeds that approach 100 Gbps.
ag.Optical fiber is a guided transmission
media.
ah.Unguided transmission media is carrier
of data signals that flow through the air or by radiation in the form of
electromagnetic wave.
ai.Repeaters are used to extend the
maximum distance of a network.
aj.Gateway is used to connect between different
types of networks.
ak.The Internet uses TCP/IP Protocol.
al.Mozilla Firefox, Google Chrome, Safari,
Opera, Internet Explorer, Maxthon, SeaMonkey are some of the most popular web
browsers.
am.Online shopping means buy or sell goods through a web site.
C. State the following statements re True or
False:
a.The device that sends data to the
destination or target is the receiver.
- False(The sender transmits data; the
receiver receives it.)
b.In a simplex mode, only one device can
transmit the signal.
- True(Simplex allows one-way communication
only, e.g., keyboard to monitor.)
c.In a full duplex mode, only one device can
transmit the signal at the same time.
- False(Full duplex allows simultaneous
two-way communication, e.g., telephone calls.)
d.Guided media is also called unbounded media or
wire media.
- False(Guided media is bounded (e.g.,
cables); unguided media is wireless.)
e.Gateway is a central connectivity device that
splits the network connection into multiple devices.
- False(A gateway connects dissimilar
networks; a hub/switch splits connections.)
f.A bridge is a type of computer network device
that provides interconnection with other bridge networks using the same
protocol.
- True(Bridges connect LAN segments with the
same protocol.)
g.TCP/IP, HTTP and FTP are the types of
networking systems.
- False(They are protocols, not
"networking systems.")
h.In bus topology, all the computers are
connected to a centrally placed device called hub or switch.
- False(Bus topology uses a single backbone
cable; star topology uses a central hub/switch.)
i.In 1964 Paul Barren brought the concept of
Internet.
- False(Paul Baran developed
packet-switching, but ARPANET (1969) was the Internet precursor.)
j.Web browsers are the websites that allow the
users to search information based on keyword or a combination of keywords.
- False(Web browsers access websites; search
engines like Google search by keywords.)
k.The most common web browser software is
Microsoft Internet Explorer, Google's Chrome, etc.
- True(These are widely used browsers, though
IE is now deprecated for Edge.)
l.The process of receiving information at your
computer from another computer through a network is called uploading.
- False(This is called downloading; uploading
is sending data to another computer.)
m.Telnet was developed in 1969 to support remote
connectivity.
- True(Telnet allows remote login to other
computers over a network.)
n.Postal mail allows us to send and receive
messages to and from anyone with an email address, anywhere in the world.
- False(Postal mail refers to physical mail;
the description applies to email.)
o.Electronic mail is one of the most widely used
features of the Internet.
- True(Email is a fundamental and heavily
used Internet service.)
p.Opera and Safari are the names of search
engines.
- False(They are web browsers; search engines
include Google, Bing, etc.)
D. Write down the single technical term for
the followings:
a. A set of rules with which computers
communicate with each other over a network.
- Protocol(e.g., TCP/IP, HTTP)
b. A form of wireless transmission in which
signals are sent via pulses of infrared light.
- Infrared (IR) transmission
c. A device that connects multiple networks
using the same protocol.
- Router
d. A device or software that converts data into
dissimilar networks.
- Gateway
e. A device that is used to translate analog
signals into digital and vice versa.
- Modem(Modulator-Demodulator)
f. A networking architecture which covers a
geographical location.
- WAN(Wide Area Network)
g. The differences between the highest and the
lowest frequencies of a transmission media.
- Bandwidth
h. Devices on one network that can communicate with
devices on another network through a device
- Gateway
i. The visual communication of parties around
the world.
- Video Conferencing
j. The huge collection of hypertext document on
internet.
- World Wide Web (WWW)
k. The service that allows sending text
messages, graphics/images using computer.
- Email(Electronic Mail)
l. A program that allows to log into another
computer on the Internet.
- Telnet
m. Online postal service.
- Email
n. The internal interface produced by adjacent
pair of twisted pair cable.
- Crosstalk
o. A company that provides E-mail and Internet
services to the user.
- ISP(Internet Service Provider)
p. Message sent electrically through computer
network
- Email
E. Full form:
a. ADSL- Asymmetric
Digital Subscriber Line
b. ARPANET- Advanced Research Projects Agency
Network
c. ASCII- American
Standard Code for Information Interchange
d. bps- bits
per second
e. CAN- Campus
Area Network
f. DSL- Digital
Subscriber Line
g. E-mail- Electronic
mail
h. FTP- File
Transfer Protocol
i. GPS- Global
Positioning System
j. GSM- Global
System for Mobile Communications
k. IP- Internet
Protocol
l. ISP- Internet
Service Provider
m. Kbps- Kilobits
per second
n. LAN- Local
Area Network
o. MAN- Metropolitan
Area Network
p. Mbps- Megabits
per second
q. MODEM- Modulator-Demodulator
r. NAT- Network
Address Translation
s. NIC- Network
Interface Card
t. OSI- Open
Systems Interconnection
u. PAN- Personal
Area Network
v. POP- Post
Office Protocol
w. SMTP- Simple
Mail Transfer Protocol
x. STP- Shielded
Twisted Pair
y. TCP/IP- Transmission
Control Protocol/Internet Protocol
z. UTP- Unshielded
Twisted Pair
aa. VHF- Very
High Frequency
ab. WAN- Wide
Area Network
ac. Wi-Fi- Wireless
Fidelity
ad. WLAN- Wireless
Local Area Network
ae. WWW- World
Wide Web
F. Answer the Following Questions:
a. What
is communication media? Write with examples.
Ans:Communication media refers to the
physical or wireless channels used to transmit data between devices.
- Examples:
- Guided (Wired):Twisted pair cable, Coaxial
cable, Fiber optic cable
- Unguided (Wireless):Radio waves, Infrared,
Bluetooth, Wi-Fi
b.
What is a computer network? Define it with advantages.
Ans:A computer network is a system where
multiple computers are interconnected to share resources and data.
- Advantages:
- Resource sharing (printers, files)
- Communication (email, video calls)
- Cost efficiency (shared internet)
- Centralized data management
c.
What are the common uses of the computer network?
Ans:
- Internet access
- File sharing
- Online gaming
- Video conferencing
- Cloud computing
d.
What are network transmission devices? Explain any two of them.
Ans:Devices that help in data transmission.
- Router:Connects multiple networks (e.g., home
Wi-Fi to the Internet).
- Switch:Connects devices within a LAN and
forwards data efficiently.
e.
What do you mean by network topology? Draw a figure of ring topology and
mention its advantages.
Ans:Network topology refers to the arrangement
of nodes in a network.
- Ring Topology:Devices are connected in a
closed loop.
- Advantages:
- No data collisions
- Equal access for all devices
f.
Define star and bus topology with their advantages and disadvantages.
Ans:
- Star Topology:All devices connect to a central
hub.
- Advantages: Easy to manage, fault isolation.
- Disadvantages: Hub failure disrupts the
network.
- Bus Topology:All devices share a single
communication line.
- Advantages: Simple, low cost.
- Disadvantages: Single point of failure, data
collisions.
g.
What do you mean by communication media? Differentiate between bounded and
unbounded media.
Ans:
- Bounded (Guided):Uses physical cables (e.g.,
Fiber optic).
- Unbounded (Unguided):Uses wireless signals
(e.g., Wi-Fi).
h.
Define LAN, MAN, and WAN with suitable examples.
Ans:
- LAN (Local Area Network):Small area (e.g.,
school, office).
- MAN (Metropolitan Area Network):City-wide
(e.g., cable TV network).
- WAN (Wide Area Network):Global (e.g., the Internet).
i.
What is a protocol? Write a few examples of protocol.
Ans:Rules for data communication.
- Examples:TCP/IP, HTTP, FTP, SMTP.
j.
What are the internet services? Explain a few of them.
Ans:
- Email:Electronic messaging (e.g., Gmail).
- WWW:Web pages accessed via browsers.
- FTP:File transfers between computers.
k.
What is a search engine? Give some examples of search engines.
Ans:A web tool to find information online.
- Examples:Google, Bing, Yahoo.
l.
What is e-mail? Mention any four features of e-mail.
Ans:Electronic mail for digital messaging.
- Features:
- Fast delivery
- Attachments support
- Global reach
- Cost-free
m.
Differences between "Uploading" and "Downloading":
- Uploading:Sending data to a remote server
(e.g., posting a photo).
- Downloading:Receiving data from a server
(e.g., saving a file).
n.
Define web browser with examples.
Ans:Software to access the web (e.g.,
Chrome, Firefox).
o.
What is World Wide Web? Mention any two advantages.
Ans:A system of interlinked hypertext
documents.
- Advantages:
- Easy information access
- Global connectivity
p.
Differentiate among simplex, half-duplex, and full-duplex modes.
Ans:
- Simplex:One-way (e.g., TV broadcast).
- Half-duplex:Two-way, but not simultaneously
(e.g., walkie-talkie).
- Full-duplex:Two-way simultaneously (e.g.,
phone call).
q.
What are modems? What purpose do they serve?
Ans:Modems convert digital signals to analog
(for transmission) and vice versa.
r. Peer-to-Peer
vs. Client-Server:
- Peer-to-Peer:All devices are equal (e.g.,
file sharing).
- Client-Server:Centralized server manages
resources (e.g., websites).
s.
What are protocols? Name some common ones.
Ans:Rules for communication (e.g., TCP/IP,
HTTP, FTP).
t.
What is NOS? Give examples.
Ans:Network Operating System (e.g., Windows
Server, Linux).
u.
Guided vs. Unguided Media:
- Guided:Uses cables (e.g., Ethernet).
- Unguided:Wireless (e.g., Wi-Fi).
v. Explain
"bandwidth."
Ans:The maximum data transfer rate of a
network (measured in bps).
w.
What is fiber optic cable?
Ans:A high-speed cable using light pulses
for data transmission.
A. Short answers questions:
1. What is data communication?
= Data communication is the exchange of data between devices via some form of transmission medium.
2. List out the components of data communication.
= The components of data communication are as follows:
i) Sender
ii) Receiver
iii) Medium
iv) Protocols
v) Interfaces.
3. What is computer network?
= A computer network is a collection of interconnected devices that can communicate and share resources.
4. What do you mean by server and workstation?
= A server is a central computer that provides data or services to other devices on the network, while a workstation is a personal computer used by an individual for tasks such as data processing or software development.
5. What do you mean by dedicated server and non-dedicated server?
= A dedicated server is exclusively allocated to serve the needs of one user or organization, while a non-dedicated server may serve multiple users or purposes.
6. What is Network Interface Card? Why does it require in computer?
= A Network Interface Card (NIC) is a hardware component that enables a device to connect to a network.
It's required in computers to facilitate communication over a network.
7. What is transmission media? List its types.
= Transmission media refers to the physical pathways through which data travels in a network.
Its types are as follows:
i) Guided or bounded or wired transmission media
ii) Unguided or Unbounded or Wireless transmission media
8. What is bandwidth? What is the measuring unit of bandwidth?
= Bandwidth is the capacity of a communication channel to transmit data.
Its measuring unit is typically bits per second (bps) or a multiple thereof, such as Mbps or Gbps.
9. What is guided transmission media? List any three guided transmission media.
= Guided transmission media are those that use a physical conductor to transmit data.
Some guided transmission medias are as follows:
i) Twisted pair cable
ii) Coaxial cable,
iii) Fiber optic cable
iv) Wireless transmission.
10. What is unguided transmission media? List any three unguided transmission media.
= Unguided transmission media, also known as wireless media, transmit data through the air without the use of a physical conductor.
Some unguided transmission medias are as follows:
i) Radio waves
ii) Microwaves
iii) Infrared.
11. What is the role of modem in data transmission?
= A modem (modulator-demodulator) converts digital data from a computer into analog signals for transmission over analog communication lines, and vice versa. It enables communication between digital devices over analog networks.
12. Different between VTP and STP cable.
= VTP (Twisted Pair) and STP (Shielded Twisted Pair) cables differ in their shielding capabilities, with STP offering better protection against electromagnetic interference.
13. Difference between Hub and Switch.
= A hub operates at the physical layer of the OSI model and simply forwards data to all connected devices, while a switch operates at the data link layer and intelligently routes data only to the intended recipient, improving network efficiency.
14. Difference between Server and Workstation.
= A server is a central computer that provides data or services to other devices on the network, while a workstation is a personal computer used by an individual for tasks such as data processing or software development.
15. What is network topology? List the three basis topologies.
= Network topology refers to the physical or logical layout of devices on a network. Basic topologies include bus, star, and ring.
16. What is communication protocol? List any four network protocols.
= A communication protocol is a set of rules and conventions that govern how data is transmitted and received between devices in a network. Examples include TCP/IP, HTTP, FTP, and SMTP.
B. Long answer questions.
1. What are the different data transmission modes? Explain about them.
= The different data transmission modes are as follows:
i. Simplex Mode:
In simplex mode, data is transmitted in only one direction. One device is the sender, and the other device is the receiver. The receiver can only receive data and cannot send any back. Examples of simplex mode include television and radio broadcasting.
b. Half-Duplex Mode:
In half-duplex mode, data can be transmitted in both directions, but not simultaneously. Devices can both send and receive data, but not at the same time. Instead, they take turns transmitting and receiving. Walkie-talkies are an example of half-duplex mode.
c. Full-Duplex Mode:
In full-duplex mode, data can be transmitted simultaneously in both directions. This means that devices can send and receive data at the same time without having to take turns. Ethernet connections and telephone networks using separate lines for sending and receiving data are examples of full-duplex mode.
2. Write any four advantages and disadvantages of computer network.
= Four advantages of computer network are as follows:
i) Communication: Enables seamless communication and collaboration among users.
ii) Resource Sharing: Facilitates sharing of hardware, software, and data resources.
iii) Cost Efficiency: Reduces costs associated with hardware and software duplication.
iv) Accessibility: Allows remote access to resources, enhancing flexibility and productivity.
Four disadvantages of computer network are as follows:
i) Security Risks: Vulnerable to cyber threats like hacking, malware, and data breaches.
ii) Dependency: Network failures can disrupt operations and cause downtime.
iii) Complexity: Maintenance and management of network infrastructure require expertise.
iv) Privacy Concerns: Raises issues of privacy infringement and unauthorized access to sensitive information.
3. Computer Network Reduces Expenses of an Office justify this statement with examples.
= Computer networks can indeed reduce expenses for an office in several ways:
a. Resource Sharing:
By connecting multiple computers and devices to a network, resources such as printers, scanners, and storage devices can be shared among users. This reduces the need for each individual user to have their own dedicated resources, leading to cost savings on hardware and maintenance.
b. Centralized Services:
Networks allow for the centralization of services such as file storage, email, and internet access. Instead of each user having their own email server or internet connection, these services can be provided centrally, reducing costs associated with purchasing and maintaining multiple servers or connections.
c. Remote Access:
With a network in place, employees can access files, applications, and resources from remote locations, reducing the need for expensive business travel and facilitating remote work arrangements. This can lead to savings on travel expenses and office space.
d. Efficiency:
Computer networks enable streamlined communication and collaboration among employees, leading to increased productivity and efficiency. Tasks such as document sharing, project management, and scheduling can be handled more efficiently through networked systems, reducing operational costs.
4. What is local area network? Why are computers kept on the LAN?
= A Local Area Network (LAN) is a network that connects computers and devices within a limited geographical area, such as a home, office, or school. Computers are kept on LANs for easier sharing of resources like files, printers, and internet connections, as well as for communication between devices.
5. What is metropolitan area network? Why is it called
composed of LANS
= A Metropolitan Area Network (MAN) is a network that covers a larger geographical area than a LAN but is still confined to a city or metropolitan area. It's composed of LANs because it connects multiple LANs within a city.
6. What is wide area network? Why is it called composed of
LANs and MANS?
= A Wide Area Network (WAN) is a network that spans a large geographical area, such as multiple cities or countries. It's called composed of LANs and MANs because it connects LANs within different locations, often across long distances.
7. Write the differences between client-server network and
peer-to-pee network model.
= In a client-server network model, clients request services or resources from servers. Servers are dedicated computers that provide services like file storage, email, or website hosting. In a peer-to-peer network model, all computers are considered equal and can act as both clients and servers, sharing resources directly without a dedicated server.
8. What is bus topology? List its advantages and
disadvantages.
= In this topology, all devices are connected to a single cable called a bus. Advantages include simplicity of design and low cost, while disadvantages include the potential for network congestion and failure if the main cable fails.
9. What is ring topology? List its advantages and disadvantages.
= In this topology, devices are connected in a circular manner, where each device is connected to two other devices forming a ring. Advantages include simplicity and equal access to the network, while disadvantages include the entire network being affected if one device fails and potential for network congestion.
10. What is star topology? List its advantages and
disadvantages.
= In this topology, all devices are connected to a central hub or switch. Advantages include easy troubleshooting and scalability, while disadvantages include dependency on the central hub and potential for network congestion.
11. Define TCP/IP, HTTP, FTP, SMTP and POP protocols
= TCP/IP (Transmission Control Protocol/Internet Protocol) is the set of protocols used for internet communication.
HTTP (Hypertext Transfer Protocol) is used for transmitting web pages over the internet.
FTP (File Transfer Protocol) is used for transferring files between computers on a network.
SMTP (Simple Mail Transfer Protocol) is used for sending email, and
POP (Post Office Protocol) is used for retrieving email from a mail server.
C. Full form:-
1. STP - Shielded Twisted Pair
2. UTP - Unshielded Twisted Pair
3. NIC - Network Interface Card
4. LAN - Local Area Network
5. MODEM - Modulator-Demodulator
6. MAN - Metropolitan Area Network
7. WAN - Wide Area Network
8. WLAN - Wireless Local Area Network
9. TCP/IP - Transmission Control Protocol/Internet Protocol
10. SMTP - Simple Mail Transfer Protocol
11. POP - Post Office Protocol
12. FTP - File Transfer Protocol
13. MAC - Media Access Control
14. ISP - Internet Service Provider
D. Technical Term:-
1. The transmission of data or information between computers:
=Data Communication
2. Transferring of data and information over significant distances:
=Wide Area Network (WAN)
3. Mode of transmission that transmits data in only one direction:
=Simplex
4. Mode of transmission that can alternately send and receive data:
=Half-duplex
5. Mode of transmission that can send and receive data simultaneously:
= Full-duplex
6. The data handling capacity of a communication system:
=Bandwidth
7. The amount of data transmitted per second through the communication channel:
= Data Rate
8. A group of interconnected computers:
= Network
9. A computer on a network:
=Node
10. A computer on the network that controls and provides resources:
= Server
11. A computer on the network that uses the resources of the network:
= Client
12. The computer that works stationontrol authority and regulates communication to other stations:
= Network Controller
13. A server computer that does not allow a user to perform application tasks on it:
= Dedicated Server
14. A server computer that allows a user to perform application tasks on it:
= Application Server
15. A server computer that provides files related services:
= File Server
16. A server that provides database services:
= Database Server
17. A server that provides internet services:
= Web Server
18. A card through which a computer is connected on the network: Network
= Interface Card (NIC)
19. A device that works like a physical interface between cabling and network nodes:
= Hub
20. A path through which data is transmitted from one computer to another:
= Data Transmission Path
21. The amount of data transmitted per second through a communication channel:
= Data Transfer Rate
22. The data handling capacity of a communication channel:
= Channel Capacity
23. A transmission media that uses network cables:
= Wired Media
24. A transmission medium that guides data along a specified path:
= Guided Media
25. The computer network which uses bounded media:
= Wired Network
26. A network of computers formed by using unguided media:
= Wireless Network
27. A transmission medium through which data are transmitted in the form of light:
= Optical Fiber
28. An operating system used in a server computer:
= Server Operating System
29. A network device that retransmits signals to all nodes on the network:
= Hub
30. A multiport repeater:
= Switch
31. A network device that retransmits signals to a destination node on the network:
= Switch
32. A network device that connects segments of the same or different networks having the same protocol:
= Router
33. A network device that can determine the best path for forwarding data packets:
= Router
34. A network device that joins networks having different protocols:
= Gateway
35. A device that converts digital signals into analog signals and vice versa:
= Modem
36. The conversion of digital signals into analog signals:
= Modulation
37. The conversion of analog signals into digital signals:
= Demodulation
38. A network of computers in a room, building, or campus:
= Local Area Network (LAN)
39. A computer network that is spread within a city or neighboring cities:
= Metropolitan Area Network (MAN)
40. A network of computers that covers the whole world:
= Wide Area Network (WAN)
41. The network model where there is at least one server:
= Client-Server Model
42. The network model where each node has an equal right:
= Peer-to-Peer Model
43. The cabling pattern of interconnected nodes.
= Mesh Topology
44. The cabling pattern of computers where each computer is connected to a common cable in the linear format.
= Bus Topology
45. The cabling pattern of computers where all the nodes are connected in
a closed loop.
= Ring Topology
46. The cabling pattern of computers where each node is individually connected to a centrally located device.
= Star Topology
47. A set of rules by which computers on the network communicate with each other.
= Protocol
48. A native protocol of the Internet.
= TCP/IP (Transmission Control Protocol/Internet Protocol)
49. A protocol that allows a user on one host to access and transfer files to another network.
= FTP (File Transfer Protocol)
50. A network protocol that transmits electronic mail from one server to another server.
= SMTP (Simple Mail Transfer Protocol)
51. A network protocol that receives e-mail from an email server.
= POP3 (Post Office Protocol version 3)
52. Software that is used for surfing information through the internet.
= Web Browser
D. True or False:
1. In a communication system a sender generates or creates messages to be transferred.
True
2. In the simplex, the transmission of data can take place in both directions. False
3. A full duplex device can send and receive data simultaneously at a time. True
4. A computer on the network can share hardware only.
False
5. A server acts as the controller, storehouse and distributor of data, information and programs.
True
6. A non-dedicated server does not allow a user to perform application tasks on it.
True
7. A dedicated server allows a user to perform application tasks on it.
False
8. Windows NT Server, Novell Netware Server and Windows XP are network operating systems.
True
9. The network can have only one workstation.
False
10 A workstation is the computer that uses the services of the network.
True
11. A node address of a NIC helps us to identify a computer on the network.
True
12. The high bandwidth channel is known as broadband channel.
True
13. A coaxial cable is used in Star topology.
False
14 Data are transmitted in the form of light in the fiber optic cable.
True
15. In the wired network, computers are connected with each other through wires.
True
16. Microwave signals travel in straight line and cannot pass through obstacles like buildings, hills, etc.
False
17. A hub is also called multiport repeater.
True
18. A switch reduces the network traffic and improves the network performance.
True
19. Multiple bridges can be used to form a large network by connecting several small networks.
True
20. A repeater is a network device that regenerates electric signals.
True
21. A NIC converts digital signals into analog signals and vice versa.
False
22. In the star topology computers must be arranged in the form of star.
False
23. A computer network that covers small local area is MAN.
False
24. Internet is an example of WAN.
True
25. You can send messages from one computer to another computer on the network.
True
F. Choose the correct answer:
1. Which of the device is simplex?
a) Television
b) Telephone
c) Computer
d) None of the above
2. Walkie-Talkie is the example of.....
a) Simplex
b) Half Duplex
c) Full Duplex
d) None of the above
3. The term network basically refers to
a) Communication
b) Interconnection
c) Sharing
d) All of the above
4. The bandwidth of digital signal is measured in
a) Hertz
b) Cycle per second
c) Bits per second
d) None of the above.
5. The computer network enables us to share..........
a) Hardware
b) Data
c) Software
d) All of the above
6. Which is not network operating system?
a) Windows NT Server
b) Windows 98
c) Windows Server 2003
d) None of them
7. A workstation computer can have.......operating system.
a) Windows 98
b) Window NT Workstation
c) Windows XP
d) All of them
8. Which is not the guided medium?
a) UTP
b) STP
c) Microwave
d) Fiber optic cable
9. Which is the connector of UTP cable?
a) BNC
b) T-Connector
c) ST connector
d) RJ-45 connector
10. Which the network operating system used in a server computer?
a) Novell Netware Server
b) Windows Vista
c) Windows NT server.
d) All of them.
11. A dedicated server that manages printers and printing jobs is......
a) Network Server
b) Printer Server
c) Modem Server
d) File Server.
12. A networking device that joins multiple networks having different protocols is ....
a) Switch
b) Router
c) Gateway
d) Bridge
13. Which of the following is transmission medium?
a) FTP
b) UTP
c) SMTP
d) All of them
14. Which is not the network protocol?
a) TCP/IP
b) STP
c) FTP
d) SMTP