Computer networks serve as a basis of communication in the information technology realm. Used in a myriad of ways, these networks are composed of smaller complex connections for the means of transmitting information from one point to another. Bridges are one such connection that is used to join two subnetworks that utilize interchangeable protocols, and they combine two LANs to form an extended LAN, allowing you to transfer data over longer distances.
Defined by their penetrating efficiency, bridges are highly intelligent devices that only allow for certain specified packets to be transmitted. As such, bridges only pass packets addressed from a node in one network to another node in a different network. More than that, they separate a network into sections which represent a collision domain that has a distinct bandwidth, providing enhanced network performance.
How a Bridge Works
A bridge carries out transmission processes as follows:
Types of Bridges
Bridges in computer networks can be classified into three distinct types: transparent bridges, translational bridges, and source route bridges. Transparent bridges, or learning bridges, are invisible bridges in a computer network. Its primary function is to block or forward data depending on the MAC address. The other devices in the network are usually unaware that this connection is being made, hence its characteristic of invisibility.
This type of bridge constructs a table of terminal addresses while it simultaneously implements two connecting LANs. The table provides a basis for determining where the information will be routed. Transparent bridges can also merge several bridges to check incoming network traffic in a more efficient way. You can find this type of bridge in Ethernet networks.
Translational bridges play a major role in changing a networking system from one type to another. They are typically used to connect two distinct networks such as a token ring and Ethernet. Moreover, these bridges can add or remove data as necessary depending on the terminal direction. Translational bridges also have the ability to forward the frames of data link layers in between LANs, utilizing varying types of network protocols.
This bridge contains the total frame route embedded in a single frame, allowing the bridge to decide how the frame is using the network to forward data. This method of transmission allows two similar network segments to be connected to the data link layer. More than that, source route bridges serve a particularly important role in preventing a looping problem.
Uses of Bridges
Bridges are widely used in large and busy networks, working to divide them into smaller interconnected subnetworks for enhanced performance. They are also recognized for their ability to increase the physical size of a network. Furthermore, they are used to connect a LAN segment through a synchronous modem in relation to another LAN segment in another location.
Conclusion
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