Computer Network Basics Questions Long
The purpose of a network bridge in a computer network is to connect two or more separate network segments or LANs (Local Area Networks) together, allowing them to communicate with each other as if they were a single network.
A network bridge operates at the data link layer (Layer 2) of the OSI (Open Systems Interconnection) model and is responsible for forwarding data packets between the connected network segments. It does this by examining the destination MAC (Media Access Control) address of each incoming packet and determining whether to forward it to the other network segment(s) or discard it.
Bridges are typically used in scenarios where there is a need to extend the reach of a network or to segment a large network into smaller, more manageable parts. By connecting multiple LANs together, a bridge helps to increase the overall network capacity and efficiency by reducing network congestion and improving data transfer speeds.
Furthermore, network bridges also provide isolation and security benefits. They create separate collision domains for each network segment, preventing collisions from occurring between devices on different segments. This isolation helps to improve network performance and reduces the chances of data collisions and packet loss.
In addition, bridges can also filter network traffic based on MAC addresses, allowing network administrators to control and restrict access to specific network segments. This enhances network security by preventing unauthorized devices from accessing sensitive information or resources.
Overall, the purpose of a network bridge is to interconnect separate network segments, improve network performance, enhance security, and provide better network management and control.