VLANS

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Cabling
Cisco
DataCenter
Hardware
Hubs
Routers
Switches
Hi guys, cold anyone please explain what VLANS are and how and when to implement it in a network. Thank You

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Instead of giving you a long winded explanation, here is a cisco link that describes using VLANs in both wired and wireless environments.

http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00801444a1.html

I would suggest that VLANs are useful whenever you should divide up a network either for security reasons or because the flat net has grown too large.
rt

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  • Sonyfreek
    Just my quick $0.02: Rely on VLANs less for security than for segmenting the network into manageable subnets. When VLANs were first recommended, it was said that if the network was VLANned, it was more secure. But with arp spoofing/poisoning and vlan hopping, VLANs can be circumvented unless you've taken precautions against it. http://www.nsa.gov/snac/downloads_switches.cfm?MenuID=scg10.3.1 Wayne
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  • BrantWellsTFC
    Hi All: Think of a VLAN as a separate network. For instance, in my environment (a College), we allow the students to use network connections in the dorms. We keep them on a separate VLAN than our Faculty and Staff We also have our firewall configured so that the student VLAN can't access the Faculty VLAN...this way, if the student VLAN gets a virus, or what-not, it doesn't affect the Faculty VLAN. VLANs can be used to help secure a network, but other hardware has to be configured to keep the VLANs separated. Hope This Helps! ~Brant
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