VLAN Communications: Making Networks Talk to Each Other

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 an abbreviation of local area network. To subdivide a network into virtual LANs, one configures a network switch or router.

There are three methods of permitting traffic to flow between VLANs:

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Virtual Private Network

Common Protocols for Virtual Private Networks (VPNs)

Maintaining the security of internal data as well as the data of clients or customers is an important part of any organization’s operations. In the last few years, many organizations that didn’t take information security seriously have been hacked, with the stolen data openly released—or sold to opposing parties. These incidents have been happening for years; the only difference is that lately they have been more visible, and they have affected the information of many more people.

One way of protecting data as it passes between internal and remote locations is by implementing a virtual private network (VPN).VPNs have been around for a long time (over 20 years) and have been used in two primary ways: protecting the data from a host machine to a central location (client to network), Continue reading