Previously, remote access was typically provided through the use of dial-up lines and ISDN lines (using 1-800 services). Branch office connectivity was provided using leased lines. These methods are expensive and don't scale to increasing remote access needs of enterprises.
Remote Access Servers (RASs) provide scalability by the addition of more and more physical ports to accommodate increasing number of remote users. However, this further translates to increased infrastructural investment expenses and maintenance costs for companies.
Contemporary remote access is ensured through the Internet using firewalls and VPN capabilities on private networks. This is a cheaper, more scalable solution. The need today is for solutions that rapidly access networks remotely via the Internet, are cost-effective, scalable and interoperable with standard applications and devices.
Laptops and PDAs are increasing using wireless (802.11x) connectivity to connect to corporate LANs via wireless access points (WAPs). However, network administrators are unwilling to deploy wireless LANs until these LANs can provide security, manageability and scalability.
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