Class-30 VLAN Trunking & tagging in Hindi | Virtual Lan | Step by Step Configuration
Class-30 VLAN Trunking & tagging in Hindi | Virtual Lan | Step-by-Step Configuration
A Virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). LAN is the abbreviation for local area network and in this context virtual refers to a physical object recreated and altered by additional logic. VLANs work by applying tags to network frames and handling these tags in networking systems – creating the appearance and functionality of network traffic that is physically on a single network but acts as if it is split between separate networks.
In this way, VLANs can keep network applications separate despite being connected to the same physical network, and without requiring multiple sets of cabling and networking devices to be deployed.
#Vlan #Intervlan #Virtual_Lan #Switching
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A complete end-to-end path must exist before the communication takes place.
In case of circuit switching technique, when any user wants to send the data, voice, video, a request signal is sent to the receiver then the receiver sends back the acknowledgment to ensure the availability of the dedicated path. After receiving the acknowledgment, dedicated path transfers the data.
Circuit switching is used in public telephone network. It is used for voice transmission.
Fixed data can be transferred at a time in circuit switching technology.
Space Division Switches:
Space Division Switching is a circuit switching technology in which a single transmission path is accomplished in a switch by using a physically separate set of crosspoints.
Space Division Switching can be achieved by using crossbar switch. A crossbar switch is a metallic crosspoint or semiconductor gate that can be enabled or disabled by a control unit.
The Crossbar switch is made by using the semiconductor. For example, Xilinx crossbar switch using FPGAs.
Space Division Switching has high speed, high capacity, and nonblocking switches.
Space Division Switches can be categorized in two ways:
Crossbar Switch
Multistage Switch
Crossbar Switch
The Crossbar switch is a switch that has n input lines and n output lines. The crossbar switch has n2 intersection points known as crosspoints.
Multistage Switch
Multistage Switch is made by splitting the crossbar switch into the smaller units and then interconnecting them.
It reduces the number of crosspoints.
If one path fails, then there will be an availability of another path.
VLANs allow network administrators to group hosts together even if the hosts are not directly connected to the same network switch. Because VLAN membership can be configured through software, this can greatly simplify network design and deployment. Without VLANs, grouping hosts according to their resources needs the labor of relocating nodes or rewiring data links. VLANs allow devices that must be kept separate to share the cabling of a physical network and yet be prevented from directly interacting with one another. This managed sharing yields gains in simplicity, security, traffic management, and economy.
To subdivide a network into VLANs, one configures network equipment. Simpler equipment might partition only each physical port (if even that), in which case each VLAN runs over a dedicated network cable. More sophisticated devices can mark frames through VLAN tagging
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