1. You are the administrator for a small VoIP network connected to an ITSP in the United States. The topology consists of one voice router, a UCM, and three PoEcapable switches. All of the IP phones are receiving power. However, none of the IP phones on the network are registering with UCM. In which of the following fault domains should you begin troubleshooting? (Select the best answer.)

A) the network switches that are connected to the IP phones
B) the UCM configuration
C) the IP phones
D) the cables connecting the IP phones to the switches



2. You are the administrator of a VoIP network. Your supervisor reports that calls to both internal and external users are connecting; however, users are unable to hear any audio. No recent configuration changes have been made to the VoIP network. Which of the following is most likely the cause of the problem? (Select the best answer.)

A) digital signal processor failure
B) router WIC failure
C) Ethernet cable failure
D) CUE network module failure



3. Which of the following protocols typically listens on TCP port 389? (Select the best answer.)

A) LDAP
B) XMPP
C) SIP
D) SCCP



4. A caller presses an IP phone softkey labeled QRT. The caller is not logged in to the IP phone. Which of the following will not be sent to an administrator? (Select the best answer.)

A) the category
B) the source user name
C) the time stamp
D)



5. All of your department's IP phones are connected to a switch that does not support PoE. A DHCP server has been configured for the voice VLAN on the switch. Another administrator power cycles the switch without warning. No calls are in progress. Which of the following is most likely to occur? (Select the best answer.)

A) The IP phones will not be affected by the power cycle.
B) The IP phones will reset and lose IP configuration information
C) The IP phones will power down until the switch restarts.
D)