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DSL

Posted by onlineusman at 2:38 AM


A DSL-based WAN uses public Internet lines. To protect the WAN from intrusion, a Virtual Private Network (VPN) is set up. Using a VPN, all WAN traffic remains encrypted en-route through the Internet, and is decrypted only at its destination. This is referred to as "tunneling," because the WAN is creating a secure channel through a public space. Firewalls also block intrusion by hackers. This type of WAN is arguably the most popular because it is cost-efficient with great benefits. It operates at high transfer speeds and is an "always on" connection, providing 24/7 uptime for the WAN.

The least expensive type of WAN uses the Internet over a dial-up modem. This type of WAN is not as popular, since the price of DSL has decreased enough to become competitive with dial-up accounts. A dial-up modem only operates at 56 kilobits per second (kbps), while a standard DSL connection is about 20 times faster. A dial-up connection also cannot share telephone service. Finally, dial-up is not an "always on" connection. When offices are in different time zones, this can effectively reduce WAN uptime.

A WAN is an excellent way for companies to utilize geographically remote resources and centralize productivity. A leased line or affordable DSL-based WAN allows employees, field personal, and management full or restricted access to pertinent data twenty-four hours a day, seven days a week. Considering the negligible cost of DSL today, a WAN makes good business sense.

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