Which of the following ports should be allowed to provide access to certain VoIP applications?
A. 110
B. 139
C. 1720
D. 5060
CompTIA A+ Core 2 Question H-94
Which of the following settings MUST be configured in order to turn on a VoIP phone?
A. PoE
B. Flow control
C. VPN
D. Duplex speed
CompTIA A+ Core 2 Question H-16
A user wants to configure their network to support VoIP. Which of the following would BEST support a VoIP installation?
A. QoS
B. POTS
C. Wake-on-LAN
D. VPN
CompTIA A+ Core 2 Question G-80
A customer wants to use VoIP phones without having to plug them into an electrical outlet. Which of the following switch features would a technician recommend?
A. QoS
B. Gigabit
C. PoE
D. Wake-on-LAN
CompTIA A+ Core 2 Question D-48
A client reports that their VoIP phone screen displays duplicate IP address. Which of the following is the FIRST action to try to resolve this problem?
A. Change MAC address settings
B. Call the vendor
C. Try another LAN connection
D. Reboot the phone
CompTIA A+ Question L-87
A network technician has been tasked with deploying new VoIP phones on a network. When the technician plugs the Ethernet cable for the phone into the wall port, the phone fails to turn on. When the technician plugs the Ethernet cable directly into the computer, the computer is able to access the network. Which of the following is the MOST likely cause of this issue?
A. The network switch does not support PoE
B. The technician is connecting the phone to the wrong type of port
C. The firewall on the network is blocking access to the DHCP server
D. The Ethernet cable is the wrong type
CompTIA A+ Question K-95
Which of the following devices uses MAC tables to allow multiple computers to access a single network connection?
A. Hub
B. Firewall
C. VoIP
D. Switch
CompTIA A+ Question J-91
Which of the following translates digital signals into analog for transmission over phone lines?
A. SAN
B. VoIP
C. Modem
D. Bridge
CompTIA A+ Question J-50
Which of the following uses RTP or SIP for communication between devices?
A. Bridge
B. NAS
C. Modem
D. VoIP
CompTIA A+ Question B-27
Which of the following devices utilizes PoE technology? (Select TWO).
A. Wireless router
B. VoIP
C. UTM appliance
D. Firewall
E. IP camera