Which of the following devices connects two segments of the same local area network (LAN) but keeps traffic separate on the two segments?
AnswerC
ExplanationA bridge connects two segments of the same LAN but keeps traffic separate on the two segments.
A bridge is an interconnectivity device that connects two local area networks (LANs) or two segments of the same LAN using the same
communication protocols, and provides address filtering between them. Users can use this device to divide busy networks into segments and
reduce network traffic. A bridge broadcasts data packets to all the possible destinations within a specific segment. Bridges operate at the
data-link layer of the OSI model.
Answer option B is incorrect. Modem stands for Modulator-Demodulator. It is a device that enables a computer to transmit information over standard telephone lines. Since a computer stores information digitally and a telephone line is analog, a modem converts digital signals to analog and vice versa. The conversion of a digital signal to analog is known as modulation and that of an analog signal to digital is known as demodulation.
Answer option D is incorrect. A switch is a network connectivity device that brings media segments together in a central location. It reads the
destination's MAC address or hardware address from each incoming data packet and forwards the data packet to its destination. This reduces
the network traffic. Switches operate at the data-link layer of the OSI model.
Answer option A is incorrect. A hub is a device used to link computers in a network. It connects computers that have a common architecture,
such as Ethernet, ARCnet, FDDI, or Token Ring. All hub-computer connections for a particular network use the same type of cable, which can
be twisted-pair, coaxial, or fiber-optic. Hubs are generally used in star topology networks. Token Ring hubs are also known as Multistation
Access Units (MSAUs). A hub works on the physical layer of the OSI model.