Teleindia Networks Interview Questions and Answers

OSI layers are a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers.

• OSI stands for Open Systems Interconnection.

• There are 7 layers in the OSI model: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has specific functions and communicates with the adjacent layers.

• Example: The Physical layer deals wit...read more

The person is productive for 7 hours.

• The person works for 9 hours but takes a 1-hour break and 1-hour lunch.

• Productive time is the time spent working without breaks or lunch.

• Therefore, the person is productive for 7 hours.

The OSI model has seven layers, each serving a specific role in network communication.

• Layer 1: Physical - Deals with hardware connections (e.g., cables, switches).

• Layer 2: Data Link - Manages node-to-node data transfer (e.g., Ethernet).

• Layer 3: Network - Handles routing of data packets (e.g., IP addressing).

• Layer 4: Transport - Ensures complete data transfer (e.g., TCP, UDP).

• Layer 5: Session - Manages sessions bet...read more

An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal.

• Types of optical amplifiers include erbium-doped fiber amplifiers (EDFAs), semiconductor optical amplifiers (SOAs), and Raman amplifiers.

• Mux and demux are devices used in wavelength-division multiplexing (WDM) systems to combine and separate multiple optical signals on a single f...read more

TCP is connection-oriented, reliable, and slower. UDP is connectionless, unreliable, and faster.

• TCP is connection-oriented, meaning a connection must be established before data can be transmitted.

• TCP is reliable as it ensures all data packets are received in order and without errors.

• TCP is slower compared to UDP due to the overhead of establishing and maintaining connections.

• UDP is connectionless, meaning data can...read more