Raghuprasad

• Dec 12th, 2005

 

A technology called VLAN (Virtual LAN broadcast domains logically segmented on an Ethernet switch) trunking that was once primarily the domain of network switches has now trickled down to the rest of the Data Center to address these issues.  Now it is possible for these multi-homing devices to be multi-homing in function without the need for multiple physical network adapters and the additional infrastructure associated with them.  VLAN trunking allows a single network adapter to behave as ?n? number of virtual network adapters, where ?n? has a theoretical upper limit of 4096 but is typically limited to 1000 VLAN network segments.  In the case where a single gigabit Ethernet adapter is trunked in place of using multiple FastEthernet adapters, higher performance at a lower cost while increasing flexibility can be achieved.  This really is the best of all worlds.  In this article, I will give you an overview of VLAN trunking, how it works what it is used for.

sunil

• Dec 16th, 2005

 

it allows n/w to be segmented logically without having physicallyeach LAN have one separate VLANID

Tanveer

• Mar 21st, 2006

 

Short for virtual LAN, a network  of computers that behave as if they are connected to the same wire even though they may actually be physically located on different segments of a LAN VLANs are configured through software rather than hardware, which makes them extremely flexible. One of the biggest advantages of VLANs is that when a computer is physically moved to another location, it can stay on the same VLAN without any hardware reconfiguration.

srivaish2000

 Profile Answers by srivaish2000 

• May 22nd, 2006

 

VLAN is used to increase security in a network. a data can be shared among some of the members in a network. all those members are grouped logically to for a virtual LAN.

rimi.mnnit

 Profile Answers by rimi.mnnit 

• Jun 22nd, 2008

 

A virtual LAN, commonly known as a VLAN, is a group of hosts with a common set of requirements that communicate as if they were attached to the same wire, regardless of their physical location.
A VLAN has the same attributes as a physical LAN, but it allows for end stations to be grouped together even if they are not located on the same LAN segment. Network reconfiguration can be done through software instead of physically relocating devices. VLANs are created to provide the segmentation services traditionally provided by routers in LAN configurations. VLANs address issues such as scalability, security, and network management. Routers in VLAN topologies provide broadcast filtering, security, address summarization, and traffic flow management. By definition, switches may not bridge IP traffic between VLANs as it would violate the integrity of the VLAN broadcast domain. Virtual LANs are essentially Layer 2 constructs, whereas IP subnets are Layer 3 constructs.