Question

Which layer of the OSI model does a bridge run at? A. Layer 4 B. Layer 1 C. Layer 3 D. Layer 2

     Which layer of the OSI model does a bridge run at?
A. Layer 4
B. Layer 1
C. Layer 3
D. Layer 2

CompTIA Network plus Certification Study Guide

CompTIA Network plus Certification Study Guide

Glen Clarke 4th Edition

Chapter 3, Problem 14

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Step 1

The OSI model has 7 layers, with Layer 1 being the physical layer, Layer 2 being the data link layer, Layer 3 being the network layer, Layer 4 being the transport layer, and so on. Show more…

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Which layer of the OSI model does a bridge run at? A. Layer 4 B. Layer 1 C. Layer 3 D. Layer 2

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Key Concepts

Network Bridges

Network bridges are devices that operate at the Data Link Layer of the OSI model. They are used to filter and forward data packets between different segments of a network, thereby reducing congestion and improving overall network performance by preventing unnecessary data from traversing the entire network.

OSI Model

The OSI (Open Systems Interconnection) Model is a conceptual framework used to understand and design a network architecture that is composed of seven layers. Each layer has specific functions and responsibilities, from the physical transmission of data to the application processes, which helps in standardizing network protocols and functions.

Data Link Layer

The Data Link Layer is the second layer in the OSI model and is responsible for node-to-node data transfer, error detection, and handling frame traffic. Devices operating at this layer, such as bridges, manage data flow between devices on the same network segment, ensuring reliable communication over a physical link.

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