Test: Data Communication - 1 - CUET Humanities MCQ

When a data communication is done in both ways, it is called duplex system.

An Oracle database is a collection of data treated as a unit. The purpose of a database is to store and retrieve related information. A database server is the key to solving the problems of information management. In general, a server reliably manages a large amount of data in a multiuser environment so that many users can concurrently access the same data. All this is accomplished while delivering high performance. A database server also prevents unauthorized access and provides efficient solutions for failure recovery.

A computer refers to a programmable machine that executes applications and provides a variety of solutions. It facilitates communication between schools as well as between students/teachers and programmes or between students/teachers and data as it is an electronic device that can store and process all kinds of data and can perform a wide range of tasks simultaneously.

• Reference book: A book intended primarily for consultation of definite information.
• Whiteboard: A board with a white surface used for teaching in the classroom.
• Voice recorder: A device used to record sounds, and then to play it back.

Connection establishment is the first phase in data communication using circuit switching technique.

In computer networking, a protocol describes a procedure for the sender and the receiver before they start a communication.

• Broadcasting: It is distribution of information in one to many manner.
• Unicasting: It is distribution of information in one to one manner.
• Packet switching: In this technique, data is broken and sent to the address of reciever in random order, independently.
• Circuit switching: It is a technique which guarantees that data packets will be received by the receiver in the same order in which they were sent by the sender.

So, option (4) is correct.

10-Gigabit Ethernet operates only over fiber-optic media.

TCP/IP, or the Transmission Control Protocol/Internet Protocol, is a suite of communication protocols used to interconnect network devices on the internet.
UDP (User Datagram Protocol) is an alternative communications protocol to Transmission Control Protocol (TCP) used primarily for establishing low-latency and loss tolerating connections between applications on the Internet.
Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet.

1 petabyte (pb) = 1024 terabytes or 1,000,000,000,000,000 bytes.

In packet switching (connectionless service), direct data transfer takes place, so it is less reliable. A connection-oriented service is more reliable than a connectionless service. We can send a message in a connection-oriented service if there is an error at the receiver's end.