Listen carefully. The top level of the OSI Reference Model and the IETF protocol stack is the application layer. The application layer, however, doesn’t do applications. It provides services such as ...

I am the biggest defense-in-depth supporter there is, but deep defenses don’t obviate the need to protect the perimeter. This year, we’re going to see a lot of action from security vendors trying to ...

Getting started on designing a network is a task of formidable proportions, but all the more so if you are looking to build a secure IT network. Often, IT system administrators are not fully familiar ...

The technology provides secure remote access to a broad spectrum of applications and network resources Application-layer VPNs are generating lots of attention these days. Proponents cite the ...

We’re all familiar with the IT “war room” scenario. When there’s an issue, members of the IT team come together to troubleshoot and find a solution. For organizations with important applications, such ...

The purpose of the network layer is to help route messages between different local networks. Central to this layer is the concept of exclusive network addresses, where every terminal connected to the ...