Question 1

Which type of data transmission allows communication in two directions simultaneously?

Accepted Answer

Full-duplex

Answer

Half-duplex

Answer

Multiplex

Answer

Simplex

Question 2

What is the primary advantage of using twisted pair wires in network connections?

Accepted Answer

Low installation cost

Answer

Long-distance capability

Answer

Immunity to interference

Answer

High capacity

Question 3

Which type of coaxial cable has a greater span length?

Accepted Answer

Thick coaxial cable

Answer

Thin coaxial cable

Answer

Shielded twisted pair

Answer

Fiber-optic cable

Question 4

What is the main disadvantage of microwave systems in data transmission?

Accepted Answer

Line of sight requirements

Answer

High cost

Answer

Limited coverage

Answer

Low capacity

Question 5

Which wireless transmission media has a delay involved in the reception of signals?

Accepted Answer

Orbital Satellite Transmission

Answer

High-Speed Wireless Communication

Answer

Very Small Aperture Terminal (VSAT)

Answer

Microwave System

Question 6

What is the function of a transceiver in a Very Small Aperture Terminal (VSAT)?

Accepted Answer

Interface with end communication device

Answer

Receive signals

Answer

Generate signals

Answer

Establish line of sight

Question 7

In the context of RS-232, what is the purpose of the start and stop bits in asynchronous communication?

Accepted Answer

To indicate the beginning and end of each character

Answer

To provide power to the devices

Answer

To synchronize the transmission rate

Answer

To represent 1s and 0s

Question 8

Which transmission method involves sending several bits of data simultaneously over different channels?

Accepted Answer

Parallel transmission

Answer

Isochronous transmission

Answer

Asynchronous transmission

Answer

Serial transmission

Question 9

What is the main advantage of parallel transmission over serial transmission?

Accepted Answer

Higher transmission speed

Answer

Simplicity in implementation

Answer

Longer distance coverage

Answer

Lower cost of wires

Question 10

In RS-232, what does the baud rate measure?

Accepted Answer

The number of signal changes per second

Answer

The voltage range between +15v and -15v

Answer

The number of bits transmitted per second

Answer

The synchronization of start and stop bits

Question 11

Which organization produced the RS-232 standard for character transfer across copper wire?

Accepted Answer

Electronic Industries Association (EIA)

Answer

Google

Answer

Institute of Electrical and Electronics Engineers (IEEE)

Answer

International Telecommunication Union (ITU)

Question 12

What is the main purpose of the stop bit in asynchronous communication?

Accepted Answer

To indicate the end of each character

Answer

To synchronize the transmission rate

Answer

To provide a pause between characters

Answer

To indicate the beginning of each character

Question 13

RS-232 encoding is ineffective over long distances primarily due to:

Accepted Answer

Signal loss due to attenuation

Answer

Modulation inefficiency

Answer

Voltage drop at the source

Answer

Oscillation interference

Question 14

The purpose of modulation when encoding data for transmission is to:

Accepted Answer

To encode data for transmission

Answer

To compress the data

Answer

To amplify the signal

Answer

To add redundancy to the data

Question 15

The role of a modem in data transmission over long lines is to:

Accepted Answer

Modulate the carrier

Answer

Amplify the signal

Answer

Decode the data at the destination

Answer

Encode data at the source

Question 16

In amplitude modulation, how is data encoded onto the carrier?

Accepted Answer

By modulating the amplitude of the carrier

Answer

By changing the frequency of the carrier

Answer

By introducing phase shifts in the carrier

Answer

By altering the wavelength of the carrier

Question 17

Which method achieves multiplexing by using different carrier frequencies?

Accepted Answer

Frequency Division Multiplexing (FDM)

Answer

Wavelength Division Multiplexing (WDM)

Answer

Time Division Multiplexing (TDM)

Answer

Statistical Time Division Multiplexing (STDM)

Question 18

In a scenario where channels compete for free slot space, which multiplexing technique is likely being used?

Accepted Answer

Statistical Time Division Multiplexing (STDM)

Answer

Wavelength Division Multiplexing (WDM)

Answer

Time Division Multiplexing (TDM)

Answer

Frequency Division Multiplexing (FDM)

Question 19

What is the purpose of dividing data into packets in a computer network?

Accepted Answer

To provide fair access for shared connections

Answer

To increase the speed of data transmission

Answer

To reduce the size of data files

Answer

To prevent transmission errors

Question 20

Which technique is used to deal with reserved bytes like SOH and EOT in a packet's data part?

Accepted Answer

Byte stuffing

Answer

Bit stuffing

Answer

Data framing

Answer

Error correction

Question 21

What is the purpose of using parity checking in error detection?

Accepted Answer

To identify the bit or bits that are erroneous

Answer

To correct errors in data

Answer

To ensure even distribution of data bits

Answer

To detect multi-bit burst errors

Question 22

Which error detection scheme is considered a weak form of channel coding that can only detect errors but not correct them?

Accepted Answer

Parity checking

Answer

Hamming codes

Answer

Cyclic Redundancy Check (CRC)

Answer

Checksum

Question 23

What is the purpose of the Frame Check Sequence (FCS) in CRC?

Accepted Answer

To generate or compute check digits for each frame

Answer

To encode reserved bytes

Answer

To correct errors in transmitted data

Answer

To provide fair access in packet switching

Question 24

In Hamming codes, which bits are considered check bits, and what is their role in error detection?

Accepted Answer

Parity bits; they force the even or odd parity of some collection of bits

Answer

Checksum bits; they are used for error correction

Answer

Data bits; they are used to identify the bit or bits that are erroneous

Answer

Reserved bits; they indicate the beginning and end of a frame

Question 25

Which LAN topology is more robust and easier to manage, but requires more cables?

Accepted Answer

Star Topology

Answer

Ring Topology

Answer

Mesh Topology

Answer

Bus Topology

Question 26

In a bus topology, what happens if the shared cable is cut?

Accepted Answer

The whole network goes down

Answer

Only one host is affected

Answer

The affected host and its neighbors are disconnected

Answer

The cable repairs itself automatically

Question 27

What technology uses counter-rotating rings and fiber optics to provide redundancy in case of a network failure?

Accepted Answer

FDDI (Fiber Data Distributed Interconnect)

Answer

Ethernet

Answer

Token Ring

Answer

ATM (Asynchronous Transfer Mode)

Question 28

Which LAN technology uses Carrier Sense with Multiple Access (CSMA) for coordinating transmission among multiple computers?

Accepted Answer

Ethernet

Answer

Token Ring

Answer

Wireless LAN

Answer

Local Talk

Question 29

In a ring topology, how many link failures does it take to partition the ring?

Accepted Answer

Two

Answer

Three

Answer

One

Answer

Four

Question 30

What is the primary advantage of using a star topology in LAN networks?

Accepted Answer

It is easier to manage and more robust

Answer

It is more resistant to link failures

Answer

It requires fewer cables

Answer

It provides higher data transfer speeds

Question 31

How does most LAN technologies identify the destination computer?

Accepted Answer

MAC Addressing

Answer

DNS Addressing

Answer

Port Addressing

Answer

IP Addressing

Question 32

How does the network identify the packet content?

Accepted Answer

Frame Type Field

Answer

Source IP Address

Answer

CRC Code

Answer

Destination Port

Question 33

What is a network analyzer?

Accepted Answer

A tool for examining and debugging a network

Answer

A device for configuring hardware addresses

Answer

A software for assigning IP addresses

Answer

A protocol for packet filtering

Question 34

What is the purpose of hardware addressing in LAN technologies?

Accepted Answer

To provide direct communication by assigning unique numeric values to each station

Answer

To determine the length of incoming frames

Answer

To handle all details of frame transmission and reception

Answer

To assign IP addresses to computers

Question 35

How is the destination address used in LAN hardware to filter incoming frames?

Accepted Answer

By comparing it to the physical address of the station

Answer

By ignoring frames with a destination address

Answer

By matching it to the source address

Answer

By comparing it to the CRC code

Question 36

What does a network analyzer do?

Accepted Answer

Counts frames of a certain type or size

Answer

Manages shared resources on a LAN

Answer

Assigns hardware addresses to computers

Answer

Configures network interfaces

Question 37

Which of the following LAN wiring schemes uses coaxial cable and requires a separate transceiver, resembling a bus topology?

Accepted Answer

Thick Ethernet

Answer

Thin Ethernet

Answer

10Base-T

Answer

10Base2

Question 38

In 10Base-T, what replaces the AUI cable and thick coax, and what is used to centralize connections and electronics?

Accepted Answer

Twisted pair cable; Hub

Answer

Coaxial cable; Switch

Answer

BNC connector; Hub

Answer

T-connector; Backbone cable

Question 39

What is the primary function of a Network Interface Card (NIC) in a computer system?

Accepted Answer

Process data independently of the system CPU

Answer

Execute instructions for each bit on the network

Answer

Manage shared resources in a client/server network

Answer

Connect multiple computers to a single network medium

Question 40

Which topology does 10Base-T logically function like, even though it resembles a star network?

Accepted Answer

Bus

Answer

Mesh

Answer

Star

Answer

Ring

Question 41

What advantage does Thin Ethernet have in terms of cable flexibility, and what is a potential drawback?

Accepted Answer

Thin and flexible; Susceptible to entire network disruption

Answer

Twisted pair; Expensive installation

Answer

Thick and inflexible; Prone to signal interference

Answer

Coaxial cable; Difficult to manage

Question 42

Which type of NIC can be used with different, similar hardware, such as Thick, Thin, and 10Base-T Ethernet?

Accepted Answer

Adaptable NIC

Answer

Universal NIC

Answer

Specialized NIC

Answer

Network adapter card

Question 43

What is the purpose of a connection multiplexor in Thick Ethernet wiring, and how does it simplify network connections?

Accepted Answer

Connects NICs to the backbone; Centralizes electronics for easier management

Answer

Connects transceivers to the NIC; Increases network speed

Answer

Connects hubs to the network; Enhances data transfer rate

Answer

Connects computers to the Ethernet; Prevents signal interference

Question 44

Why is 10Base-T considered the most popular type of Ethernet?

Accepted Answer

Lowest cost

Answer

Highest speed

Answer

Easy installation

Answer

Most reliable

Question 45

Which technology allows for the translation between different network technologies, such as Ethernet AUI-to-thinnet?

Accepted Answer

Adapters

Answer

Multiplexing

Answer

Backbone connection

Answer

Protocol software

Question 46

What function does the terminator serve in Thick Ethernet wiring, and why is it necessary?

Accepted Answer

Absorbs signals to avoid reflectance; Prevents interference

Answer

Enhances data transfer rate; Simplifies network management

Answer

Prevents signal interference; Centralizes electronics

Answer

Connects NICs to the backbone; Increases network speed

Question 47

In the context of network speeds, why can a network feed data to the CPU faster than the CPU can process it?

Accepted Answer

NICs operate independently of the system CPU

Answer

CPU processes data faster than the network can transmit

Answer

Network speeds are defined by specific processor speeds

Answer

CPU and network have the same processing speed

Question 48

What distinguishes the physical topologies of 10Base-T and Thin Ethernet, even though they both function logically like a bus?

Accepted Answer

Centralized hub; On-board NIC transceiver

Answer

Backbone connection; T-connector

Answer

Twisted pair cable; BNC connector

Answer

AUI cable; Transceiver

Question 49

How does Technology Translation occur, and what role do adapters play in this process?

Accepted Answer

Translates between network technologies; Adapters connect different technologies

Answer

Enhances data transfer rate; Adapters increase network speed

Answer

Converts protocols; Adapters connect similar networks

Answer

Translates data independently; Adapters connect different networks

Question 50

What is the primary role of a transceiver in Thick Ethernet wiring?

Accepted Answer

Connects NICs to the backbone; Increases network speed

Answer

Connects computers to the Ethernet; Prevents signal interference

Answer

Converts protocols; Adapters connect similar networks

Answer

Centralizes electronics for easier management; Enhances data transfer rate

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