3CX Basic Certification Exam Prep Document 2026/2027 | PBX
Administration, VoIP, SIP Trunking & System Configuration | 30
Verified Questions with Detailed Rationales
1: SYSTEM INSTALLATION & REQUIREMENTS
Question 1
3CX can only be installed on operating systems that use which architecture?
A) 32-bit
B) 64-bit
C) Both 32-bit and 64-bit
D) ARM architecture only
Correct Answer: B
Rationale: 3CX requires a 64-bit operating system architecture for installation. This
applies to both Windows Server and Linux distributions. The 64-bit architecture is
necessary to support the system's memory requirements and performance capabilities.
Question 2
Which versions of Windows Server are supported for 3CX installation?
A) Windows Server 2008 R2 and 2012
B) Windows Server 2012 R2 and 2016
C) Windows Server 2019 only
D) All Windows Server versions
Correct Answer: B
,Rationale: 3CX officially supports installation on Windows Server 2012 R2 and
Windows Server 2016. While newer versions may work, these are the officially
supported and tested versions for production environments.
Question 3
Which browsers are supported by 3CX for the management console and web
client?
A) Internet Explorer and Safari
B) Chrome, Edge, and Firefox
C) Opera and Safari only
D) All browsers are supported equally
Correct Answer: B
Rationale: 3CX supports Google Chrome, Microsoft Edge, and Mozilla
Firefox browsers for the management console and web client. Other browsers may not
provide full compatibility.
Question 4
Which third-party software should NOT be installed on a server running 3CX?
A) Microsoft Office
B) Exchange, MS SQL, DNS, VPN
C) Adobe Reader
D) Web browsers
Correct Answer: B
Rationale: Installing Exchange Server, Microsoft SQL Server, DNS services, or VPN
software on the same server as 3CX can cause conflicts, port contention, and
performance issues. These services compete for system resources and may interfere with
3CX operations. It is recommended to run 3CX on a dedicated server.
, Question 5
What version of .NET Framework is required to run 3CX on Windows Server?
A) .NET 3.5
B) .NET 4.0
C) .NET 4.6.1
D) .NET Core 3.1
Correct Answer: C
Rationale: 3CX requires .NET Framework 4.6.1 to be installed on Windows Server. This
is a prerequisite for the 3CX installation on Windows operating systems.
Question 6
What is the default PBX Tunnel port (TCP/UDP) used by the 3CX App and Session
Border Controller (SBC)?
A) 5001
B) 5060
C) 5090
D) 5015
Correct Answer: C
Rationale: The default PBX Tunnel port is TCP/UDP 5090, used by the 3CX App and
Session Border Controller (SBC). This port facilitates secure communication between
remote clients and the PBX.
Question 7
Administration, VoIP, SIP Trunking & System Configuration | 30
Verified Questions with Detailed Rationales
1: SYSTEM INSTALLATION & REQUIREMENTS
Question 1
3CX can only be installed on operating systems that use which architecture?
A) 32-bit
B) 64-bit
C) Both 32-bit and 64-bit
D) ARM architecture only
Correct Answer: B
Rationale: 3CX requires a 64-bit operating system architecture for installation. This
applies to both Windows Server and Linux distributions. The 64-bit architecture is
necessary to support the system's memory requirements and performance capabilities.
Question 2
Which versions of Windows Server are supported for 3CX installation?
A) Windows Server 2008 R2 and 2012
B) Windows Server 2012 R2 and 2016
C) Windows Server 2019 only
D) All Windows Server versions
Correct Answer: B
,Rationale: 3CX officially supports installation on Windows Server 2012 R2 and
Windows Server 2016. While newer versions may work, these are the officially
supported and tested versions for production environments.
Question 3
Which browsers are supported by 3CX for the management console and web
client?
A) Internet Explorer and Safari
B) Chrome, Edge, and Firefox
C) Opera and Safari only
D) All browsers are supported equally
Correct Answer: B
Rationale: 3CX supports Google Chrome, Microsoft Edge, and Mozilla
Firefox browsers for the management console and web client. Other browsers may not
provide full compatibility.
Question 4
Which third-party software should NOT be installed on a server running 3CX?
A) Microsoft Office
B) Exchange, MS SQL, DNS, VPN
C) Adobe Reader
D) Web browsers
Correct Answer: B
Rationale: Installing Exchange Server, Microsoft SQL Server, DNS services, or VPN
software on the same server as 3CX can cause conflicts, port contention, and
performance issues. These services compete for system resources and may interfere with
3CX operations. It is recommended to run 3CX on a dedicated server.
, Question 5
What version of .NET Framework is required to run 3CX on Windows Server?
A) .NET 3.5
B) .NET 4.0
C) .NET 4.6.1
D) .NET Core 3.1
Correct Answer: C
Rationale: 3CX requires .NET Framework 4.6.1 to be installed on Windows Server. This
is a prerequisite for the 3CX installation on Windows operating systems.
Question 6
What is the default PBX Tunnel port (TCP/UDP) used by the 3CX App and Session
Border Controller (SBC)?
A) 5001
B) 5060
C) 5090
D) 5015
Correct Answer: C
Rationale: The default PBX Tunnel port is TCP/UDP 5090, used by the 3CX App and
Session Border Controller (SBC). This port facilitates secure communication between
remote clients and the PBX.
Question 7
