90.810.5

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90.810.5 refers to an application field in information and communication technology, specifically related to LAN bridging. It utilizes a method known as Virtual Local Area Network (VLAN) or “virtual bridging”. This type of network is created to bridge two networks that are not connected to each other, allowing all connected hosts to share data and resources with one another. VLANs are used in various industries such as retail, healthcare, finance, government, and education, to name a few.

VLANs share many features with traditional LANs. However, the main difference between VLANs and traditional LANs is that communications between hosts inside a VLAN are separated by broadcast domain. This means that data is only meant to be sent from host to host, so no data packets can traverse from one VLAN to another. As a result, broadcast and flood traffic are also restricted. There are also differences in the addressing schemes used by VLANs and traditional LANs. VLANs use 802.1Q and 802.1X addressing schemes, while traditional LANs use IP address assignments and Layer 2 switch system and topology.

The working principle of a VLAN is simple. First, a network administrator needs to specify the network parameters. This includes defining the size of the network, the types of devices that has to be connected, and the security requirements. After all, these settings are established, the administrator then configures virtual local area network bridges (VLABs) with the settings. The VLABs will then accept traffic from connected devices and direct the traffic to the specified VLANs, thereby forming a virtual LAN.

To further secure traffic on VLANs, the administrator must set up Access Control Lists (ACLs). ACLs tell the VLABs which traffic to allow or deny. This allows the administrator to follow best network security practices and protect sensitive network resources from unauthorized access. ACLs also protect the entire VLAN by allowing the administrator to specify who is allowed to access the VLAN and who isn’t.

VLANs offer many benefits. Firstly, they reduce the complexity of networked applications, simplifying and clarifying the process of data exchange. Additionally, they also provide improved security, as the broadcast domain can be kept secluded from the rest of the network. This reduces the risk of malicious attacks and other types of abuse on the network. Finally, VLANs can efficiently accommodate the expansion of networks, allowing for growth without the need for additional cabling or terminals.

Thus, it can be seen that VLANs provide powerful capabilities that can be leveraged by organizations to increase the efficiency of their IT operations, while also decreasing the security risk associated with their data. VLANs can now be found in almost every medium- to large-sized organization, from banks to educational institutions. And with the ever-increasing number of applications and networks that organizations now rely on, they’re becoming an even more essential part of the technology toolbox.

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