Computer Networks

ARPANET was one of the first networks to implement dynamic routing, where the path taken by packets could change based on network conditions.

Cyclic Redundancy Check (CRC) is a common error-detecting code used in digital networks and storage devices to detect accidental changes to raw data.

 Internet is evolved from ARPANET.

Telephone lines transmit data one bit at a time over a single channel, which is the definition of serial transmission.

Full duplex communication allows data to be sent and received simultaneously, unlike half-duplex (one at a time) or simplex (one direction only).

Cyclic Redundancy Check (CRC) is the standard error detection method at the data link layer. Option B says 'cycle redundancy codes' which is a typo for 'cyclic', but refers to CRC.

ARPANET was the first network to implement dynamic routing, allowing packets to find paths based on current network conditions rather than fixed tables.

Shannon's capacity theorem is C = B * log2(1 + SNR). SNR in dB = 30, so 10 * log10(SNR_linear) = 30, SNR_linear = 1000. C = 3000 * log2(1 + 1000) = 3000 * log2(1001) approx 3000 * 9.96 = 29880 bps. 30,000 bps is the closest approximation.

The data bus is the set of lines responsible for carrying the actual data between the CPU, memory, and I/O devices.

A transceiver is a device that combines both a transmitter and a receiver in a single unit, allowing it to both send and receive data.

LAN stands for Local Area Network, which is designed to connect computers within a small, localized area like a home, office, or building.

The primary purpose of a Local Area Network (LAN) is to allow connected computers to share resources, such as files, data, and peripheral devices like printers.

A multiplexer is commonly referred to as a data selector because its primary function is to select one data input from many and pass it to the output.

A computer network or data network is a telecommunications network which allows computers to exchange data. In computer networks, networked computing devices exchange data with each other using a data link. The connections between nodes are established using either cable media or wireless media. All the given options are correct.