MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Network Interface Card is a small hardware device that joins multiple computers together within one LAN.

Detailed explanation-2: -Hub. Hubs connect multiple computer networking devices together. A hub also acts as a repeater in that it amplifies signals that deteriorate after traveling long distances over connecting cables.

Detailed explanation-3: -Network hubs are categorized as Layer 1 devices in the Open Systems Interconnection (OSI) reference model. They connect multiple computers together, transmitting data received at one port to all of its other ports without restriction. Hubs operate in half-duplex.

Detailed explanation-4: -The correct answer is Router. Routers are networking devices operating at layer 3 or a network layer of the OSI (Open System Interconnection) model. They are responsible for receiving, analyzing, and forwarding data packets among the connected computer networks.