Introduction to Data Communications Quiz

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What is the primary purpose of a repeater in a data communication system?

To provide error checking and correction

To establish the communication protocol

To generate new signals to extend transmission distance (correct)

To encode and decode digital data

Which of the following is NOT a standard organization for data communications?

Institute of Electrical and Electronics Engineers (IEEE)

International Telecommunication Union (ITU)

European Telecommunication Standards Institute (ETSI)

Federal Communications Commission (FCC) (correct)

What is the main purpose of a transmission medium in a data communication system?

To provide a path for the flow of information (correct)

To convert digital data into analog signals

To manage the communication protocol and flow control

To generate and transmit the data signals

Which of the following is NOT a component of a data communication system?

Modulator Signup and view all the answers

What is the primary function of a data communication protocol?

To manage the orderly flow of information Signup and view all the answers

Which of the following is NOT a mode of transmission for data communication circuits?

Multiplex Signup and view all the answers

Which type of data transmission does not require start and stop bits?

Synchronous Signup and view all the answers

Which circuit type allows signals propagating in opposite directions to occupy the same bandwidths without interference?

Four-wire circuit Signup and view all the answers

Which type of data transmission is a combination of asynchronous and synchronous?

Isochronous Signup and view all the answers

Which type of circuit is a permanent circuit for private use and is cheaper than switched lines when usage is high?

Dedicated/Leased circuit Signup and view all the answers

Which type of data transmission is controlled by start and stop bits at the beginning and end of each character?

Asynchronous Signup and view all the answers

Which type of circuit allows for full-duplex operation, where the signals propagating in opposite directions occupy different bandwidths?

Two-wire circuit Signup and view all the answers

What type of transmission allows all bits to be transmitted simultaneously during the time of a single clock pulse?

Parallel Transmission Signup and view all the answers

What is the maximum cable length for Shielded Twisted Pair (STP) cabling?

100 meters Signup and view all the answers

What is the primary difference between Serial Transmission and Parallel Transmission?

Serial transmits one bit at a time while Parallel transmits all bits simultaneously Signup and view all the answers

Which type of cable is commonly used for telephone communications but is not suitable for transmitting data?

Unshielded Twisted Pair (UTP) Signup and view all the answers

In Plesiochronous transmission, what characterizes the frequency difference between two digital signals?

The frequency difference is minimal despite accurate clocks Signup and view all the answers

What feature distinguishes Unshielded Twisted Pair (UTP) cabling from Shielded Twisted Pair (STP) cabling?

UTP is easier to install than STP Signup and view all the answers

What is the maximum data transmission speed of CAT 5 Ethernet cables?

100 Mbps Signup and view all the answers

Which type of Ethernet network uses CAT 4 cables?

Token Ring Signup and view all the answers

What is the maximum data transmission speed of CAT 6 Ethernet cables?

1000 Mbps Signup and view all the answers

What type of coaxial cable is used in 10BASE2 LANs?

Thin coaxial Signup and view all the answers

Which network topology is used to interconnect a single mainframe computer (host) to many personal computers?

Multi-point configuration Signup and view all the answers

What type of network has no physical media?

Wireless Signup and view all the answers

What is the main disadvantage of a star topology network?

All of the above Signup and view all the answers

What is the key advantage of a ring topology network?

All of the above Signup and view all the answers

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 Signup and view all the answers

What is the key advantage of a mesh topology network?

Both a and b Signup and view all the answers

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 Signup and view all the answers

Which topology is described as 'a multipoint data communication network where all stations are interconnected in tandem to form a closed loop'?

Ring topology Signup and view all the answers