3CX Academy Advanced Certification 2025 – Complete Exam Questions with 100% Correct Answers and Rationales

3CX Academy Advanced Certification | Questions with
100% Correct Answers | Verified | Latest Update 2025

Question 1
Which feature allows 3CX to automatically switch to a backup SIP trunk or
alternative route if the primary trunk fails?
A) SIP Forking
B) Outbound Rule Sequencing
C) Failover
D) Least Cost Routing
E) STUN
Correct Answer: C) Failover
Rationale: Failover in 3CX is configured within the SIP trunk settings
or outbound rules to ensure call continuity by redirecting traffic
through a secondary route if the primary becomes unavailable.

Question 2
When configuring a Digital Receptionist (IVR) in 3CX, what is a key
consideration for maximizing efficiency?
A) Make the menu options as numerous as possible.
B) Provide long, detailed explanations for each option.
C) Keep menu options concise and logically structured.
D) Use only a single-level menu.
E) Avoid custom voice prompts.
Correct Answer: C) Keep menu options concise and logically
structured
Rationale: Concise and logically structured IVR menus improve user
experience and reduce call abandonment rates by making it easy for
callers to find the correct department or information.

Question 3
Which of the following is a primary function of a 3CX Call Queue?
A) To ring all agents simultaneously until one answers.
B) To distribute inbound calls to a group of agents in an organized manner.

,C) To allow agents to make outbound calls only.
D) To record all voicemails for extensions.
E) To host web meetings.
Correct Answer: B) To distribute inbound calls to a group of agents
in an organized manner
Rationale: Call queues hold incoming calls and distribute them to
available agents based on predefined strategies (e.g., Round Robin,
Ring All, Prioritized) to ensure efficient handling.

Question 4
When configuring an Outbound Rule in 3CX, what is the purpose of "Calls to
numbers starting with prefix"?
A) To define the caller ID for the outbound call.
B) To specify the digits a caller must dial to use this rule.
C) To block certain outbound destinations.
D) To choose the SIP trunk for all calls.
E) To apply custom routing to specific dialed numbers based on their initial
digits.**
Correct Answer: E) To apply custom routing to specific dialed
numbers based on their initial digits.
Rationale: This field allows the administrator to create rules that
apply only to calls where the dialed number begins with a specific
digit sequence, enabling flexible routing based on destination.

Question 5
Which 3CX component is recommended for connecting remote IP phones and
ensuring reliable audio in complex NAT environments without requiring port
forwarding for each phone?
A) STUN server
B) VPN connection for each phone
C) 3CX Session Border Controller (SBC)
D) Direct SIP connection over the internet

,E) A simple firewall
Correct Answer: C) 3CX Session Border Controller (SBC)
Rationale: The 3CX SBC acts as a tunnel for SIP traffic, simplifying
NAT and firewall transversal for remote phones by requiring only a
single port open for all devices behind it, facilitating audio delivery.

Question 6
When setting up a Call Queue, which routing strategy ensures that calls are
distributed to agents who have been waiting the longest to take a call?
A) Ring All
B) Hunt Random Start
C) Round Robin
D) Longest Waiting
E) Prioritized Hunt
Correct Answer: D) Longest Waiting
Rationale: The Longest Waiting strategy prioritizes agents who have
been available and waiting for an incoming call for the longest
duration, aiming for even distribution of calls among agents over
time.

Question 7
What is the purpose of the "Bridge" feature in 3CX?
A) To connect two different 3CX systems to allow extensions to call each
other as if they were on the same PBX.
B) To integrate with external CRM systems.
C) To provide a public IP address for internal extensions.
D) To enable voicemail-to-email functionality.
E) To set up multi-party conference calls.
Correct Answer: A) To connect two different 3CX systems to allow
extensions to call each other as if they were on the same PBX.
Rationale: Bridging connects two separate 3CX installations,

, enabling seamless extension-to-extension dialing and presence
sharing between them.

Question 8
Which security feature in 3CX protects against brute-force attacks by
dynamically blacklisting IP addresses that fail too many authentication
attempts?
A) SIP TLS
B) Anti-hacking (IP Blacklisting)
C) Firewall Checker
D) SRTP
E) VPN
Correct Answer: B) Anti-hacking (IP Blacklisting)
Rationale: 3CX's Anti-hacking feature automatically adds IP
addresses to a blacklist if they make too many failed attempts to
register an extension or access the system, protecting against
brute-force attacks.

Question 9
When configuring a 3CX system in a cloud environment, what is the most
common reason to deploy an SBC?
A) To host the 3CX PBX itself.
B) To reduce the need for port forwarding at the remote office location.
C) To replace the need for SIP trunks.
D) To encrypt all internal LAN traffic.
E) To provide a public IP address to the 3CX server.
Correct Answer: B) To reduce the need for port forwarding at the
remote office location.
Rationale: In cloud deployments, the SBC is critical for remote
offices or individual remote phones as it tunnels all SIP traffic over a
single port, simplifying firewall configuration and avoiding
individual port forwards.