Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?

Which of the following describes an industry-wide standard suite of protocols and algorithms that allows for secure data transmission over an IP-based network that functions at the layer 3 Network layer of the OSI model?

Which of the following uses ATM as the Data Link layer protocol that's terminated at what's known as the DSLAM?

When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the clock rate determined?

Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?