Virtual private network (VPN) is a private network that interconnects remote (and often geographically separate) networks through primarily public communication infrastructures such as the Internet. VPNs provide security through tunneling protocols and security procedures such as encryption.
A VPN supplies network connectivity over a possibly long physical distance. In this respect, a VPN is a form of Wide Area Network (WAN). VPNs enable file sharing, video conferencing and similar network services. Virtual private networks generally don't provide any new functionality that isn't already offered through alternative mechanisms, but a VPN implements those services more efficiently / cheaply in most cases.
Pros:
1. VPNs enble you to create secure, business-critical communication links over the Internet.
2. Security - VPNs provide the highest level of security using advanced encryption and authentication protocols that protect data from unauthorized access.
3. Cost Savings - By leveraging third party networks, with VPN, organizations no longer have to use expensive leased or frame relay
lines and are able to connect remote users to their corporate networks via a local Internet service provider (ISP) instead of via expensive 800-numberor long distance calls to resource-consuming modem banks.
4. Compatibility with Broadband Technology - VPNs allow mobile workers, telecommuters and day extenders to take advantage of high-speed, broadband connectivity, such as DSL and Cable, when gaining access to their corporate networks, providing workers significant flexibility and efficiency.
5. Scalability - VPNs allow corporations to utilize remote access infrastructure within ISPs. Therefore, corporations
are able to add a virtually unlimited amount of capacity without adding significant infrastructure.
6. Share resources with partners
7. Give telecommuters and mobile workers secure access to your LAN
Cons:
1. Reliability can become a factor depending upon the service provider that you choose. If the VPN utilizes the Internet it is important to work with a provider that can guarantee minimal downtime.
2. The use of mobile devices to initiate connectivity to the virtual private network can cause security issues especially if the connection is wireless. For this reason, an added solution is sometimes needed to tighten up security when logging on to the VPN with a mobile device.
3. If it happens to be necessary to create additional infrastructure the solutions can become incompatible and cause technical issues if you use a different product vendor than you used for the current infrastructure. On the other side of the coin and depending upon the product vendor you use, working with the same vendor can sometimes increase the cost of deploying additional infrastructure.
4. The design and security implementation for a virtual private network can be complex. This means that it requires a professional with a high level of understanding for the best type of VPN configuration and some of the security issues that can occur when using a VPN.
5. Setting VPN can incur additional complexities and security risks. Given that an organization with a VPN exposes itself to security risks on the Internet.
6. The need for client software and related configurations.
7. VPNs require an access control list, which adds to IT administration.
8. Additional expertise is required for setting up and protecting a VPN properly.
1. VPNs enble you to create secure, business-critical communication links over the Internet.
2. Security - VPNs provide the highest level of security using advanced encryption and authentication protocols that protect data from unauthorized access.
3. Cost Savings - By leveraging third party networks, with VPN, organizations no longer have to use expensive leased or frame relay
lines and are able to connect remote users to their corporate networks via a local Internet service provider (ISP) instead of via expensive 800-numberor long distance calls to resource-consuming modem banks.
4. Compatibility with Broadband Technology - VPNs allow mobile workers, telecommuters and day extenders to take advantage of high-speed, broadband connectivity, such as DSL and Cable, when gaining access to their corporate networks, providing workers significant flexibility and efficiency.
5. Scalability - VPNs allow corporations to utilize remote access infrastructure within ISPs. Therefore, corporations
are able to add a virtually unlimited amount of capacity without adding significant infrastructure.
6. Share resources with partners
7. Give telecommuters and mobile workers secure access to your LAN
Cons:
1. Reliability can become a factor depending upon the service provider that you choose. If the VPN utilizes the Internet it is important to work with a provider that can guarantee minimal downtime.
2. The use of mobile devices to initiate connectivity to the virtual private network can cause security issues especially if the connection is wireless. For this reason, an added solution is sometimes needed to tighten up security when logging on to the VPN with a mobile device.
3. If it happens to be necessary to create additional infrastructure the solutions can become incompatible and cause technical issues if you use a different product vendor than you used for the current infrastructure. On the other side of the coin and depending upon the product vendor you use, working with the same vendor can sometimes increase the cost of deploying additional infrastructure.
4. The design and security implementation for a virtual private network can be complex. This means that it requires a professional with a high level of understanding for the best type of VPN configuration and some of the security issues that can occur when using a VPN.
5. Setting VPN can incur additional complexities and security risks. Given that an organization with a VPN exposes itself to security risks on the Internet.
6. The need for client software and related configurations.
7. VPNs require an access control list, which adds to IT administration.
8. Additional expertise is required for setting up and protecting a VPN properly.
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