Sample Questions and Answers
1. Which protocol is primarily used by Cisco IP Phones to communicate with Cisco Unified Communications Manager (CUCM)?
A. SIP
B. SCCP
C. H.323
D. MGCP
Answer: B. SCCP
Explanation: SCCP (Skinny Client Control Protocol) is a Cisco proprietary protocol used by Cisco IP Phones to communicate with CUCM. SIP is also supported but SCCP is the default.
2. Which port does SIP typically use for signaling in Cisco VoIP systems?
A. 80
B. 443
C. 5060
D. 69
Answer: C. 5060
Explanation: SIP commonly uses port 5060 for signaling over UDP or TCP and 5061 for encrypted (TLS) traffic.
3. What is the primary function of a Cisco Unified Border Element (CUBE)?
A. DHCP relay
B. Call routing between VoIP and PSTN
C. Voice-mail storage
D. Codec translation
Answer: B. Call routing between VoIP and PSTN
Explanation: CUBE connects VoIP networks to external carriers, enabling session management and protocol translation.
4. What tool is used to back up Cisco Unified Communications Manager configuration?
A. TFTP
B. RTMT
C. DRS
D. SFTP
Answer: C. DRS
Explanation: Disaster Recovery System (DRS) is used to back up and restore CUCM data including configurations and call detail records.
5. In CUCM, what is a Route Pattern?
A. A dial plan rule
B. An extension for user
C. An IP address of a phone
D. A codec
Answer: A. A dial plan rule
Explanation: A route pattern defines how dialed numbers are interpreted and routed to their destination.
6. What Cisco IP Phone button gives access to call logs and directories?
A. Services
B. Directories
C. Applications
D. Messages
Answer: B. Directories
Explanation: The “Directories” button gives access to missed, received, placed calls, and corporate directory.
7. Which device provides media resources such as conferencing and transcoding in a Cisco collaboration network?
A. CUBE
B. MGCP Gateway
C. DSP
D. Media Resource Group
Answer: D. Media Resource Group
Explanation: Media Resource Groups (MRGs) provide access to media resources like music on hold, conferencing, and transcoding.
8. Which command is used to verify a phone has downloaded its configuration file from TFTP?
A. show ip interface brief
B. show cdp neighbors
C. show ephone registered
D. show tftp events
Answer: D. show tftp events
Explanation: This command shows the TFTP download status of IP phone configuration files.
9. In Cisco Unity Connection, what is the purpose of a call handler?
A. Voicemail password handler
B. Controls how calls are answered
C. Manages CUCM routes
D. Audio codec handler
Answer: B. Controls how calls are answered
Explanation: Call handlers define how calls are managed—greetings, call routing, and actions based on caller input.
10. What feature allows CUCM to provide service redundancy to IP Phones?
A. DNS round-robin
B. TFTP mirroring
C. SRST
D. Device Pool
Answer: C. SRST
Explanation: Survivable Remote Site Telephony (SRST) provides call handling redundancy for IP phones in case of WAN failure.
11. Which codec consumes the most bandwidth?
A. G.711
B. G.729
C. iLBC
D. GSM
Answer: A. G.711
Explanation: G.711 provides high-quality audio but uses about 64 Kbps per call, higher than G.729 or iLBC.
12. Which of the following is required for Cisco IP Phones to boot up and register?
A. DHCP, TFTP, CUCM
B. TFTP, DNS, SMTP
C. SIP Trunk, SRST, NTP
D. RTP, MGCP, Syslog
Answer: A. DHCP, TFTP, CUCM
Explanation: IP Phones need DHCP to get IP and TFTP server details, TFTP to download config, and CUCM to register.
13. What does a Device Pool in CUCM control?
A. Call forwarding rules
B. Voice-mail routing
C. Regional settings for devices
D. Codec compression only
Answer: C. Regional settings for devices
Explanation: Device Pool groups settings such as region, date/time group, and call manager group.
14. Which setting controls the maximum concurrent calls a device can make in CUCM?
A. CSS
B. Device Pool
C. Max Calls
D. Route List
Answer: C. Max Calls
Explanation: The “Max Calls” setting restricts the number of simultaneous calls a phone line can handle.
15. In CUCM, which component decides the order in which Route Groups are used?
A. Route Pattern
B. Translation Pattern
C. Route List
D. Partition
Answer: C. Route List
Explanation: Route List defines the sequence of Route Groups used when routing a call.
16. What is the default TFTP file used by Cisco IP Phones during boot?
A. SEP<MAC>.xml
B. phone.cfg
C. network.xml
D. dialplan.xml
Answer: A. SEP<MAC>.xml
Explanation: This configuration file (e.g., SEP001122334455.xml) contains settings for individual phones.
17. Which tool allows real-time monitoring of CUCM system logs and alerts?
A. RTMT
B. DRS
C. CDR
D. CLI
Answer: A. RTMT
Explanation: Real-Time Monitoring Tool (RTMT) is used to monitor CUCM status, alerts, and performance metrics.
18. What is the function of Music on Hold (MoH) server in CUCM?
A. Streams music to idle phones
B. Records hold music
C. Sends music to held calls
D. Manages on-hold audio codecs
Answer: C. Sends music to held calls
Explanation: The MoH server streams audio to callers on hold.
19. What is the default behavior of a Translation Pattern?
A. Converts SIP to SCCP
B. Translates digits in dial plan
C. Routes to voicemail
D. Blocks DTMF
Answer: B. Translates digits in dial plan
Explanation: Translation Patterns manipulate dialed digits before call routing.
20. Which CUCM feature restricts which numbers a user can dial?
A. Partition
B. CSS
C. Route Group
D. Region
Answer: B. CSS
Explanation: Calling Search Space (CSS) defines access to partitions, limiting call destinations.
21. What is the purpose of an MOH Audio Source ID in CUCM?
A. Sets voicemail language
B. Defines codec preference
C. Assigns audio to be played when on hold
D. Configures ring tones
Answer: C. Assigns audio to be played when on hold
Explanation: Each MoH source ID corresponds to a specific audio file played to held callers.
22. What does DHCP Option 150 provide to Cisco IP Phones?
A. IP address
B. DNS server
C. TFTP server address
D. Gateway address
Answer: C. TFTP server address
Explanation: Option 150 gives phones the TFTP server IP used to download configuration files.
23. What is CUCM’s primary database called?
A. AXL
B. SQL
C. Informix
D. ASA
Answer: C. Informix
Explanation: CUCM uses IBM Informix as its primary back-end database.
24. Which codec is preferred for low-bandwidth VoIP calls?
A. G.711
B. G.722
C. G.729
D. G.726
Answer: C. G.729
Explanation: G.729 offers compressed audio suitable for low-bandwidth WAN links.
25. What feature provides fallback call control when CUCM is unreachable?
A. RTMT
B. SRST
C. MGCP
D. SCCP
Answer: B. SRST
Explanation: SRST on routers allows phones to register locally when CUCM is down.
26. What does the “auto-registration” feature in CUCM do?
A. Automatically assigns phone numbers
B. Automatically registers IP Phones without configuration
C. Enables DHCP on phones
D. Provides firmware updates
Answer: B. Automatically registers IP Phones without configuration
Explanation: Auto-registration allows IP phones to join the CUCM system with default settings.
27. Which component in CUCM handles digit manipulation?
A. Route Pattern
B. Partition
C. Translation Pattern
D. Region
Answer: C. Translation Pattern
Explanation: Translation Patterns manipulate dialed digits (e.g., strip/add prefix) before routing.
28. What is the maximum number of active calls supported by a Cisco 7965 IP Phone (SCCP)?
A. 2
B. 4
C. 6
D. 8
Answer: D. 8
Explanation: Cisco 7965 can support up to 8 active lines/calls using SCCP.
29. How are firmware updates delivered to Cisco IP Phones?
A. Via SMTP
B. Via SFTP
C. Via TFTP
D. Via HTTPS
Answer: C. Via TFTP
Explanation: IP Phones use TFTP to download firmware and config files from the CUCM TFTP server.
30. What is the role of a Partition in CUCM?
A. Defines codec policies
B. Groups dialable patterns
C. Assigns voice-mail boxes
D. Controls SRST settings
Answer: B. Groups dialable patterns
Explanation: Partitions organize dial plan patterns; users can dial only patterns accessible via their CSS.
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