Designing computer networks

In the design and maintenance of any computer network there are many big and small issues on the resolution of which no mention in the theoretical calculations. It turns out that many of them can be solved by applying a combination of several technologies, or implementing some technologies where they are in accordance with its objective function can not be applied. The publication is the whole emphasis is on the practical side of the building and maintenance of computer networks, dismantled the devices and techniques that today are basic and fundamental routers from Cisco Systems and their configuration, queuing technology, address translation, construction of the shield, adjustment routing protocols, building secure virtual networks and the like. The publication is intended not only for novice administrators who want to understand the basic principles of working with network software and hardware systems - experienced professionals will also find here a lot of valuable information.