WorksheetsDDC_Midterm Quiz24
Total questions: 30
Worksheet time: 30mins
What does the term "telecommunication" mean?
Exchange of data between devices
Communication at a distance
Data transfer through radio waves
Digital communication between computers
Which of the following is a characteristic of digital communication?
Uses only analog data
Always uses binary (0s and 1s) form
Can use both digital and analog data
Operates only in wired networks
What is the medium of communication in data communications?
Transmission of data through the air
Any medium such as wire or optical fibers
Only traditional phone lines
Only optical fibers
Which organization is responsible for standardizing data communications?
IEEE
ISO
ITU
All of the above
Which of the following describes the simplex mode of data transmission?
Data can be sent in both directions simultaneously
Data can be sent in both directions, but only one at a time
Data is sent in one direction only
Data is exchanged between multiple devices
In a star topology, what is the central connecting device?
A hub or switch
A router
A computer
A bus cable
What type of network is designed for connectivity over long distances?
Local Area Network (LAN)
Wide Area Network (WAN)
Metropolitan Area Network (MAN)
Wireless Network
Which topology connects all devices in a network with each other directly?
Star topology
Ring topology
Bus topology
Mesh topology
What is an essential element of a data communication protocol?
Data rate
Security
Syntax
Cable type
What does "throughput" measure in a network?
Time delay between data transfers
Data protection level
Rate of successful data delivery over a network
Number of devices in the network
Which of the following is an example of wired transmission media?
Radio waves
Infrared
Coaxial cable
Microwave
What type of communication is Bluetooth (IEEE 802.15.1) typically used for?
Long-range communication
Short-range wireless communication
High-speed internet access
Satellite communication
Which of the following transmission media uses light for data transmission?
Twisted pair
Fiber optic cable
Coaxial cable
Radio waves
What type of multiplexing is used to transmit signals based on different frequencies?
Time Division Multiplexing (TDM)
Frequency Division Multiplexing (FDM)
Wavelength Division Multiplexing (WDM)
Digital Multiplexing
Which standard is most commonly used for wired LAN networks?
Wi-Fi (IEEE 802.11)
Ethernet (IEEE 802.3)
LTE
Bluetooth
Which wireless communication standard operates in the 2.4 GHz and 5 GHz frequency bands?
Bluetooth
Wi-Fi (IEEE 802.11)
LTE
HDLC
What is the maximum data rate supported by USB 3.0?
480 Mbps
5 Gbps
10 Gbps
1 Gbps
Which data transmission standard is used for serial communication between computers and peripheral devices?
TCP/IP
USB
RS-232
Ethernet
What is the primary function of the IP protocol in TCP/IP?
Error detection and correction
Ensuring reliable packet transmission
Defining the addressing and routing system
Managing flow control
Which of the following is a feature of HDLC (High-Level Data Link Control)?
Packet fragmentation
Error detection and correction
Multiplexing based on frequency
High-speed wireless transmission
What is the primary purpose of communication protocols?
To limit data exchange between devices
To define how data is exchanged between devices
To increase the speed of data transfer
To encrypt data transmission
Which protocol operates at the application layer of the OSI model?
TCP
IP
HTTP
Ethernet
Which protocol is connection-oriented and ensures reliable data transmission?
UDP
HTTP
TCP
IP
What is a key feature of the UDP (User Datagram Protocol)?
Connection-oriented
Error-checking and retransmission
Focus on speed rather than reliability
Guarantees in-order delivery of packets
What is the main role of the Internet Protocol (IP)?
File transfer between computers
Routing packets to their destination
Encrypting data for secure communication
Establishing a connection before data transmission
Which of the following is an example of a transport layer protocol?
IP
TCP
Ethernet
HTTP
Which protocol is used for transferring web pages between browsers and web servers?
FTP
SMTP
HTTP
DNS
What frequency bands does Wi-Fi (IEEE 802.11) operate on?
1 GHz and 2 GHz
2.4 GHz and 5 GHz
5 GHz and 6 GHz
3 GHz and 4 GHz
Which protocol is used for secure file transfers over a network?
FTP
SMTP
SFTP
SNMP
What does DNS (Domain Name System) do?
Encrypts domain names for secure communication
Translates domain names into IP addresses
Manages the transfer of files between computers
Monitors device status and network health
