In your own words what are the following, examples can be added.
1. What is an extranet? (Minimum word count: 30)
2. Describe the function of a firewall. (Minimum word count: 70)
3. Which tunneling protocols are commonly used by VPNs? (Minimum word count: 25)
4. Describe a differential backup. (Minimum word count: 35)
5. What is authentication? (Minimum word count: 50)
