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WorksheetsData communication 1
Total questions: 20
Worksheet time: 10mins
Which of the following is NOT a component of a communication system?
Transmitter
Receiver
Transmission Medium
Compiler
Which topology connects all devices in a network to a single central hub?
Bus
Star
Ring
Mesh
What is the primary purpose of modulation in data communication?
Error detection
Data encryption
Transmission of signals over long distances
Improving bandwidth utilization
In which layer of the OSI model does error detection occur?
Physical Layer
Data Link Layer
Network Layer
Transport Layer
What type of signal is used in analog communication?
Continuous
Discrete
Binary
Encoded
Which of the following devices is used to amplify signals in a communication system?
Router
Repeater
Switch
Hub
Which protocol is used to send emails?
FTP
SMTP
HTTP
SNMP
Which of the following is NOT an example of guided media?
Twisted-pair cable
Coaxial cable
Fiber optic cable
Radio waves
What does 'bandwidth' refer to in data communication?
The amount of data transmitted per second
The number of devices connected to a network
The delay in transmitting data
The number of bits in a signal
What type of multiplexing is used in optical fiber communication?
TDM (Time Division Multiplexing)
FDM (Frequency Division Multiplexing)
WDM (Wavelength Division Multiplexing)
CDM (Code Division Multiplexing)
What is the primary function of the transport layer in the OSI model?
Routing data between networks
Ensuring reliable delivery of data
Encoding data into signals
Establishing network connections
Which switching technique is used in the Internet?
Circuit switching
Message switching
Packet switching
Frequency switching
What does TCP stand for in networking?
Transmission Communication Protocol
Transport Control Protocol
Transfer Communication Protocol
Transmission Control Protocol
Which protocol is used to assign IP addresses dynamically?
DNS
DHCP
FTP
ARP
Which of the following is a connection-oriented protocol?
UDP
TCP
HTTP
ICMP
Which type of error detection uses a parity bit?
Cyclic Redundancy Check (CRC)
Hamming Code
Simple Parity Check
Checksum
What is the purpose of the ARP (Address Resolution Protocol)?
Resolve IP addresses to domain names
Resolve MAC addresses to IP addresses
Resolve IP addresses to MAC addresses
Encrypt communication
What is the unit of signal-to-noise ratio (SNR)?
Hertz
Decibel
Bits per second
Joule
Which of the following is a protocol used for secure communication over a network?
HTTPS
FTP
Telnet
HTTP
Which layer in the OSI model is responsible for flow control and segmentation?
Application Layer
Transport Layer
Network Layer
Data Link Layer
