MindMap Gallery Virtual LAN
This is a mind map about virtual LAN, which tells the story of virtual LAN. If you are interested in the story of virtual LAN, you are welcome to collect and like this mind map~
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This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
Virtual LAN
Virtual Local Area Network (VLAN) is a logical network division method that uses switches to organize devices located in different physical locations into a logical local area network.
VLAN connects devices in different locations together so that they can communicate as if they are on the same LAN. This logical division makes network management more flexible and convenient.
Through VLAN, administrators can group devices according to functions, departments or security levels to achieve more fine-grained control and management.
VLAN can dynamically adjust the network structure when the physical topology changes, improving the scalability and flexibility of the network.
How virtual LAN works
Virtual LAN is implemented through port division and VLAN tagging of switches.
Port division: For switches that support VLAN, administrators can divide each switch port into different VLANs. In this way, even if devices in different VLANs are connected through the same switch, they will not communicate with each other, achieving logical isolation.
Through port division, devices with different functions or security requirements can be placed in different VLANs and have more granular permission control.
VLAN tag: Add a VLAN tag (VLAN Tag) to the data frame to identify the VLAN to which the data frame belongs.
In this way, when the switch receives the data frame, it can forward the data frame to the correct VLAN according to the VLAN tag, thereby realizing communication and isolation between different VLANs.
The protocols used by VLAN tags include IEEE 802.1Q and ISL (Cisco proprietary protocol), which add an extra piece of information to the data frame, including the VLAN identifier.
Advantages of Virtual LAN
Flexible network management: VLAN can flexibly divide and manage devices as needed, simplifying network configuration and maintenance. Administrators can group devices according to different needs and conduct more granular permission control based on actual conditions.
Improve network performance: By dividing different VLANs, you can reduce the scope of the broadcast domain, avoid broadcast storms and conflicts, and improve the data transmission efficiency and overall performance of the network.
Enhance network security: Through VLAN isolation and permission control, logical isolation between devices in different departments and different security levels can be achieved. This reduces the risk of potential cyberattacks and data breaches.
Improve network reliability: VLAN can achieve network redundancy and link aggregation, improving network reliability and fault tolerance.
Application scenarios of virtual LAN
Virtual office: According to different departments, different office devices are divided into different VLANs to achieve logical isolation and permission control between offices.
Virtual data center: Divide servers, storage devices and network devices into different VLANs to achieve flexible management of the data center and optimize resource utilization.
Guest network: Provides independent network access services for guests to avoid security threats to the internal network from guest devices.
VoIP network: Divide independent VLANs for VoIP phones, IP cameras and other devices to ensure the quality and security of voice and video transmission.
Internet of Things (IoT): Divide IoT devices into independent VLANs, isolate and manage IoT devices, and ensure network stability and security.