Remote connectivity methods
A Virtual Private Network (VPN) provides a secure channel for communication over an unsecure network such as the internet. VPNs allow organizations to interconnect their remote offices securely without the need for a managed solution such as a Wide Area Network (WAN) from a regional Internet Service Provider (ISP). Many organizations around the world prefer a WAN because the service provider is responsible for establishing, maintaining, and troubleshooting any issues with the service to the customer. However, managed services from service providers cost money and not all organizations have the financial resources for such services. An alternative, cost-efficient solution is to implement a VPN to interconnect remote branch offices around the world. Many enterprise routers and firewall appliances support VPN technologies and allow network professionals to implement both site-to-site and client-to-site VPNs without spending a lot of money on managed services...
