3CX ADVANCED CERTIFICATION EXAM 2026-2027 ACTUAL EXAM 100 QUESTIONS AND CORRECT DETAILED ANSWERS|AGRADE||NEWEST UPDATE

3CX ADVANCED CERTIFICATION EXAM 2026-2027 ACTUAL

EXAM 100 QUESTIONS AND CORRECT DETAILED

ANSWERS|AGRADE||NEWEST UPDATE

Your 3CX has only one SIP Trunk and receives a call from number

8135791691. If you have a "Inbound CID Reformatting" rule on the

Trunk with "Source Pattern" 813(...)(.*) and "Replace Pattern" \1\2, the

extension that receives the call will see "5791691" as the caller ID on its

display. - ANSWER- True

When 3CX has been installed without a FQDN from 3CX and in split

DNS mode, the DNS server must not be installed on the same machine

as the phone system. - ANSWER- True

Your Local IP Phone loses the registration to 3CX and you want do

troubleshoot the issue. You should start a Wireshark Capture on the 3CX

Server, reboot the phone, and then apply the Filter

sip.Cseq.Method==REGISTER in order to see if registrations are

reaching 3CX - ANSWER- True

Your 3CX has only one SIP Trunk and receives a call from number

422033272020 and you want it to be presented on the extension display

as +44272020. You can do this with a "Inbound CID Reformatting" rule

on the Trunk with "Source Pattern" 44(..)(..)(.*) and "Replace Pattern"

+44\3. - ANSWER- True

When selecting the option "I need a 3CX FQDN" an internal DNS is not

mandatory - ANSWER- True

The order of "Inbound Rules" is not important when you have DID and

CID "Inbound Rules", CIDs always have higher priority. - ANSWERFalse

You have a Master Bridge with 3-digit extensions 1xxx and a Slave

Bridge with 4-digit extensions 2xxx. In the "Outbound Rules" you use to

rote calls across the bridge, using a prefix is mandatory. - ANSWERFalse

You have run the 3CX "Firewall Checker" and comes up as Green, but

you still have audio issues and calls dropping on on outbound / inbound

calls. Can SIP ALG be the culprit? - ANSWER- True

An extension will be allowed up to 25 attempts (default) for

authenticating successfully, after what it will be blacklisted for the

default blacklisting interval of 1800 minutes. - ANSWER- False

The 3CX SIP port should be filtered by firewall ACL rules to maximize

security and allow only trusted IPs to reach it (VoIP providers or STUN

extensions if any). - ANSWER- True

SRTP will secure calls so that a middle-man can't see the SIP traffic in

plain-text. - ANSWER- False