Data Communication Quiz 2

In data communication, the term "throughput" refers to:

• The theoretical maximum data rate

• The actual data rate achieved over a network

• The propagation speed of signals

• The latency in data transmission

What is the main purpose of protocols in data communication?

• Maximizing bandwidth

• Enhancing signal quality

• Defining rules for data exchange

• Establishing physical connections

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

• Transmitter

• Medium

• Protocol

• Buffer

What defines the physical topology of a network?

• Type of signals used

• Arrangement of devices and links

• Protocols implemented

• Transmission mode

Latency in a communication system is affected by:

• Bandwidth only

• Distance only

• Propagation, transmission, and processing delays

• Number of devices connected

In the OSI model, which layer handles end-to-end communication and reliability?

• Data Link Layer

• Session Layer

• Transport Layer

• Network Layer

The main responsibility of the presentation layer in the OSI model is to:

• Establish connections

• Route data packets

• Provide data format conversion and encryption

• Manage error correction

Which protocol is used at the transport layer in the TCP/IP model?

• IP

• FTP

• TCP and UDP

• ARP

Encapsulation of data at the network layer involves adding:

• Session headers

• IP headers

• Transport headers

• Ethernet headers

Which of the following OSI layers is absent in the TCP/IP model?

• Data Link

• Network

• Session

• Application