| 6.1 |  | Virtual Private Networks |
| 6.1.1 |  | Introduction |

| A Virtual Private Network (VPN) provides the same network connectivity for remote users over a public infrastructure, as they would have over a private network. VPN services for network connectivity include authentication, data integrity, and confidentiality. There are two basic VPN types:

- LAN-to-LAN VPNs — There are two common types of LAN-to-LAN VPNs, also known as site-to-site VPNs:
  - Intranet VPNs connect corporate headquarters, remote offices, and branch offices over a public infrastructure.
  - Extranet VPNs link customers, suppliers, partners, or communities of interest to a corporate Intranet over a public infrastructure.
- Remote Access VPNs — Which securely connect remote users, such as mobile users and telecommuters, to the enterprise. Remote access VPNs will be covered in the next module.