Today, more than ever, companies can support employees that work from remote locations. This Cisco CCNA curriculum points to the current trend and affordability of supporting remote employees, the increasing numbers of remote workers, and the increasing level of productivity possible for the remote worker. What are the factors that make this possible? Access to low cost, public high speed internet services like DSL, Cable Modem, Satellite and Wi-Max, and the current strength of security possible over the public internet with IPsec and VPN tunneling technology.
In the past, companies that required a high level of security for their data and resources did not have an inexpensive option for extending their company network to a remote worker. Today this can be accomplished over the public internet with VPN technology.
What is a VPN connection?
A VPN connection is a secure connection to a remote network. When a VPN connection is established, the remotely connecting computer can access the company’s network resources, meaning access to company computers, files servers, printers, etc.. In other words, you can characterize a computer that has established a VPN connection to a remote network, as being on that network, as if it was physically placed on the network. This usually means that the connecting computer receives an IP address from the remote network’s network address space on a virtual tunneling interface.
VPN connections can be between a VPN client and a VPN server or site-to-site between to VPN servers/network devices. VPN client-to-server and VPN site-to-site services are possible with Cisco PIX firewalls, Cisco ISR routers, Cisco ASA devices.