1. A user working remotely has a secure VPN access to an Operating System back at his regular office. What kind of service is this called? a. Desktop as a Service b. Platform as a Service c. Infrastructure as a Service d. Virtual Machine 2. What capability on a router allows a single physical interface to become a default gateway for multiple networks? Shorthand notation Sub-interface Tunneling Router advertisement a. Desktop as a Service b. Platform as a Service c. Infrastructure as a Service d. Virtual Machine.