The question of exactly how to explain or define a VPN is one that is often up for discussion amongst today's network consumers and communications providers. If we look at the literal definition of the words virtual private network, it can help to understand what is, and what a VPN is not. VPN is a network technology which gives the owner the ability to share information with others on the network by means of a private, exclusive link that is created by a method other than hard-wires or leased lines; usually via the internet. Before the internet, computers in different offices, cities or even countries could only talk to each other like people could - through telephone wires. They are advantages and disadvantages to Broadband Internet Access. It does not affect the phone line. For DSL internet access, you can use the same phone line for both voice/fax and data transmission. For cable internet access, you are connected to the internet via the cable network. In either case, your phone line is not occupied while you are connected to the internet. It is convenient because the internet connection is always on. Broadband internet offers unlimited access and you won't be charged based on the connection duration. Disadvantages are high monthly fee compared to dialup internet access. It has higher security risk than dialup connection. A personal firewall is needed to protect your computer. Wireless working enables a wide spectrum of business applications that integrate with ‘head office’ to be used remotely from sales force automation, to field service engineering, to financial services. Wireless working creates a productive environment in remote locations, including satellite offices and workers’ homes, to enable staff to utilize their time effectively and to manage their work/life balance. The mobile communication devices consist of hand held phones, car