1. What does the demarcation point represent in data communication physical circuits?
DTE/DCE interface on the device connecting to the Internet
location of the firewall or router
physical point at which the public network ends and the private customer network begins
tag assigned to the physical block where a cross-connect occurs
2. Refer to the exhibit. Which statement is true about PPP operation?
Layer 2 is down.
LCP, IPCP, and CDPCP negotiations are in progress.
Only the link-establishment phase completed successfully.
Both the link-establishment and network-layer phase completed successfully.
3. Which three statements are true regarding LCP? (Choose three.)
It is responsible for negotiating link establishment.
It negotiates options for Layer 3 protocols running over PPP.
It uses MD5 encryption while negotiating link establishment parameters.
It terminates the link upon user request or the expiration of an inactivity timer.
It can test the link to determine if link quality is sufficient to bring up the link.
It monitors the link for congestion and dynamically adjusts the acceptable window size.