Building a virtual private network by Meeta Gupta

By Meeta Gupta

Your enterprise needs to be hooked up so that it will compete within the worldwide industry. staff want to know that their company's community is out there at any time, from anywhere. A digital deepest community (VPN) accomplishes this through the use of distant connectivity applied sciences that mix current inner networks with the web to soundly speak details. construction a digital inner most community is your key to designing, enforcing, and securing an absolutely attached community that meets your online business wishes.

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The data and the resources located within the network can be secured in the following ways: ◆ Implementation of peripheral defense mechanism(s) that allow only authorized traffic from trusted sources into the network and block all the other traffic. Firewalls and Network Address Translation (NAT) are examples of defense mechanisms that are implemented at the point where a private network or intranet is connected to a public network. Firewalls scrutinize not only the incoming traffic but also the outgoing traffic, thus ensuring a high level of security.

Because the dial-up access is local, modems perform at higher data rates as compared to long-distance access. ◆ VPNs provide better accessibility to the corporate site because they support a minimum level of access services despite the heavy increase in the number of simultaneous users accessing the network. As the number of connected users increases in a VPN setup, though services may be decreased, accessibility is not completely disrupted. FIGURE 1-2 The non-VPN remote access setup. INTRODUCTION TO VPNS Chapter 1 FIGURE 1-3 The Remote Access VPN setup.

A. 25 is not a VPN protocol. Instead, it is a network technology. 2. c. L2TP is a combination of PPTP and L2F. L2TP is not the predecessor of L2F. Instead, L2F is the predecessor of L2TP. Also, PPTP is a proprietary Microsoft protocol. L2F and L2TP are Cisco protocols. 3. a, c, and d. Remote Access, Intranet, and Extranet VPNs are the three most popular categories of VPNs. 4. c. The term RAS stands for Remote Access Server. 5. a ,c, and d. Remote Access VPNs eliminate the need for a modem pool.

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