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VLAN
A logical network segmentation implemented on switches and bridges to manage traffic. Multiple VLANs can be hosted on the same switch but are isolated as if they are separate physical networks. Only through a routing function, often provided by a multilayer switch, can cross-VLAN communications occur. VLANs function like physical network segments. Virtual Local Area NetworkVirtual local area network.
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Highspeed switch that forwards packets between datalink segments. Most LAN switches forward traffic based on MAC addresses. This variety of LAN switch is sometimes called a frame switch. LAN switches are often categorized according to the method they use to forward traffic: cutthrough packet switching or storeandforward packet switching. Multilayer switches are an intelligent subset of LAN switches. Compare with multilayer switch. See also cutthrough packet switching, storeandforward packet switching.
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The act of subdividing a network into numerous smaller units. These smaller units, groupings, segments, or subnetworks (i. e. , subnets) can be used to improve various aspects of the network. Segmentation can boost performance, reduce congestion, compartmentalize communication problems (such as broadcast storms), and provide security improvements through traffic isolation. Segments can be created by using switch- based VLANs, routers, or firewalls (as well as combinations of all of these).
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The IEEE standard that defines VLAN tagging. VLAN tagging is used by switches and bridges to manage traffic within and between VLANs.
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The ability to make network traffic jump between VLANs through an abuse of IEEE 802. 1Q VLAN tagging known as double encapsulation.
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Private VLANs that are configured to use a dedicated or reserved uplink port. The members of a private VLAN or a port isolated VLAN can interact only with each other and over the predetermined exit port or uplink port. A common implementation of port isolation occurs in hotels.
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