Basically, VPN deals with security and connecting nodes in a private network across a public IP internet work. Read RFC 1853 - IP Tunneling. You can take one physical LAN and split it into multiple virtual LANs, or you can take multiple physical LANs and integrate them into a VLAN. RFC 0824 is good reading.
A VLAN is a virtual LAN. In technical terms, a VLAN is a broadcast domain created by switches. Normally, it is a router creating that broadcast domain. With VLANs, a switch can create the broadcast domain. This works by, you, the administrator, putting some switch ports in a VLAN other than 1, the default VLAN. All ports in a single VLAN are in a single broadcast domain. Because switches can talk to each other, some ports on switch A can be in VLAN 10 and other ports on switch B can be in VLAN 10. Broadcasts between these devices will not be seen on any other port in any other VLAN, other than 10. However, these devices can all communicate because they are on the same VLAN. Without additional configuration, they would not be able to communicate with any other devices, not in their VLAN.
You can't really compare the two, since VPNs are designed to work over larger distances - unlike a LAN, which works only for a short distance.If all you need is a local connection between devices, you have no need for a VPN. In any case, the disadvantage is the additional complexity.
Based on the VLAN tag.
the switchport access vlan 99 command is used to designate a specific VLAN for a switch port, allowing you to control how traffic on that port is treated and segregated from traffic on other ports and VLANs in the network. This is a fundamental configuration step in building and managing VLANs within a network infrastructure.
A physical router device with an interface that routes between two or more VLANs that are attached to a VLAN network segment by a trunk link. In other words a " router on a [ TRUNK ] " which is originating from switches with independent non routing VLANs.
SSL (Secure Socket Layer,) is a protocol. Most Cisco VPNs will use SSL as their security protocol, so there is no difference between Cisco VPN and SSL VPN.
VLAN is a group of hosts with a common set of requirements that communicate as if they were attached to the same broadcast domain, regardless of their physical location. Inter VLAN is defined as two VLANS connected to each other and communicating.
If you've understood most of this document so far, the principles of Virtual private networking (VPN) will be easy to understand. The most confusing part of VPN is that many acronyms show up.
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Access like carry the single vlan information & Trunk link able to carry the multiple vlan information when frames are travels from trunk mani shanker
Proxy and VPN are two methods of connecting over the internet. Proxy servers act for a different computer. VPN stands for Virtual Private Network and allows for a connection to occur while activity remains private.
Since VLAN's cannot communicate with other VLAN's directly, I believe you would have to set up a router to do that. I would check out how to set up a bridge between two VLAN's.
vlan trunking protocols. eg :802.1q ,ISL
A switch's interface typically refers to the physical ports on the switch through which devices connect, allowing for data transmission within the same local network. In contrast, a VLAN (Virtual Local Area Network) interface is a logical interface associated with a specific VLAN, enabling Layer 3 IP routing and communication between different VLANs. While switch interfaces handle traffic for individual devices, VLAN interfaces manage traffic for groups of devices segmented by VLANs, enhancing network organization and security.
• Access link: An access link is a link that is part of only one VLAN, and normally access links are for end devices. Any device attached to an access link is unaware of a VLAN membership. An access-link connection can understand only standard Ethernet frames. Switches remove any VLAN information from the frame before it is sent to an access-link device.• Trunk link: A Trunk link can carry multiple VLAN traffic and normally a trunk link is used to connect switches to other switches or to routers. To identify the VLAN that a frame belongs to, Cisco switches support different identification techniques (VLAN Frame tagging). Our focus for CCNA examination is on Inter-Switch Link (ISL) and 802.1Q.A trunk link is not assigned to a specific VLAN. Many VLAN traffic can be transported between switches using a single physical trunk link.
A VLAN trunk allows for data to travel across a single link between two devices even if the data is from multiple VLANs. This allows for reduced cabling needed as for you won't have to run multiple cables between switches in order to have up-links for every VLAN.
A lease-line is dedicated point to point connection between two peers, but MPLS VPN is a multiple path connection depending upon the destination which has a look-up table called VRF where the destination address can be checked and the traffic is passed accordingly.