VPN

1. Links 2 computers thru an underlying local or wide area network

2. Private network that uses a public network (internet) to connect users

2.1. don't give up control of data

2.2. give up control of the pipe

3. Disadvantages

3.1. lack of standoards

3.2. unpredictable internet traffic

3.3. diff to accomodate products from diff vendors

3.4. understanding of security issues

4. Secure VPNs use crytographic tunneling protocols