30 Questions
What is the primary purpose of a repeater in a data communication system?
To generate new signals to extend transmission distance
Which of the following is NOT a standard organization for data communications?
Federal Communications Commission (FCC)
What is the main purpose of a transmission medium in a data communication system?
To provide a path for the flow of information
Which of the following is NOT a component of a data communication system?
Modulator
What is the primary function of a data communication protocol?
To manage the orderly flow of information
Which of the following is NOT a mode of transmission for data communication circuits?
Multiplex
Which type of data transmission does not require start and stop bits?
Synchronous
Which circuit type allows signals propagating in opposite directions to occupy the same bandwidths without interference?
Four-wire circuit
Which type of data transmission is a combination of asynchronous and synchronous?
Isochronous
Which type of circuit is a permanent circuit for private use and is cheaper than switched lines when usage is high?
Dedicated/Leased circuit
Which type of data transmission is controlled by start and stop bits at the beginning and end of each character?
Asynchronous
Which type of circuit allows for full-duplex operation, where the signals propagating in opposite directions occupy different bandwidths?
Two-wire circuit
What type of transmission allows all bits to be transmitted simultaneously during the time of a single clock pulse?
Parallel Transmission
What is the maximum cable length for Shielded Twisted Pair (STP) cabling?
100 meters
What is the primary difference between Serial Transmission and Parallel Transmission?
Serial transmits one bit at a time while Parallel transmits all bits simultaneously
Which type of cable is commonly used for telephone communications but is not suitable for transmitting data?
Unshielded Twisted Pair (UTP)
In Plesiochronous transmission, what characterizes the frequency difference between two digital signals?
The frequency difference is minimal despite accurate clocks
What feature distinguishes Unshielded Twisted Pair (UTP) cabling from Shielded Twisted Pair (STP) cabling?
UTP is easier to install than STP
What is the maximum data transmission speed of CAT 5 Ethernet cables?
100 Mbps
Which type of Ethernet network uses CAT 4 cables?
Token Ring
What is the maximum data transmission speed of CAT 6 Ethernet cables?
1000 Mbps
What type of coaxial cable is used in 10BASE2 LANs?
Thin coaxial
Which network topology is used to interconnect a single mainframe computer (host) to many personal computers?
Multi-point configuration
What type of network has no physical media?
Wireless
What is the main disadvantage of a star topology network?
All of the above
What is the key advantage of a ring topology network?
All of the above
What is the primary difference between a tree/hierarchical topology and an extended-star topology?
A tree/hierarchical topology branches out from a trunk node, while an extended-star topology uses a central node
What is the key advantage of a mesh topology network?
Both a and b
Which topology is described as 'simply a combination of two or more of the traditional topologies to form a larger, more complex topology'?
Hybrid topology
Which topology is described as 'a multipoint data communication network where all stations are interconnected in tandem to form a closed loop'?
Ring topology
Test your knowledge on the fundamentals of data communications, including the process of transferring digital information, components of data communication systems like messages, transmitters, receivers, and transmission mediums.
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