A VPN enables you to establish a secure, encrypted network within a hostile , public network such as the Internet. VPNs provide several benefits, including the following:
For example, VPNs are useful if you are traveling with a laptop, Pocket PC, or wireless smartphone, and you need to access your company's network. A VPN will enable you to connect to your company from anywhere in the world through an inexpensive, local Internet connection.
VPNs are also useful for international companies with branch offices in different countries . Using local connections, your company can become globally and securely networked over the public Internet.
VPNs provide secure, encrypted communication in two ways:
Thus, VPNs are secure communication solutions that take advantage of public networks to lower your costs. However, VPNs have their share of problems. Some challenges involved in establishing VPNs are as follows :