Question

Discuss the concept of Virtual Local Area Network (VLAN). In particular, answer the following questions:
• What technologies enable the creation of VLANs?
• What advantages do VLANs bring to cloud deployments?
• What are the ways of securing VLANs?

Answer 1

Technologies enable the creation of VLANs:-

Inter-Switch Link ( This is the technology that supports high-speed trunking between switches, and switches, routers, or servers in a fast Ethernet environment.)

VLAN Standardization (IEEE 802.1q provide for the standardization of VLANs based on three-layer approaches, currently several different transport mechanisms are used for communicating VLAN information across high-performance backbones)

VLAN Standard Implementation (Means that user can maintain the use of the VLAN trunking scheme used by the vendor)

Advantages of VLAN to cloud deployment:-

Every organization has a big amount of data. And that data is coming from different sectors like data is coming from IT or Sales team like this which depends on the organization's structure. So here VLANs look at your entire possible VLAN landscape and spend some time accessing the logic for how to best group your users. VLAN also provides strong security and simplicity so that we maintain and improve our service.

The way of securing VLANs:

Basically, the first thing is just to simplify the multi-VLAN deployment is by use of the private VLAN. So that primary VLAN carries traffic from promiscuous port to all other ports in the same VLAN.

Trunks are connected between two switches so we think these are not safe but remember one think these trunk links are connected those devices which are under you control. So, some attackers can be leverage to gain access to the trunk or to the VLAN, Due to this we know that how the attack works, and how to you prevent from them.