Free Cisco 300-820 Exam Questions

Become Cisco Certified with updated 300-820 exam questions and correct answers

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Total 205 Questions | Updated On: Mar 12, 2026

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Question 1

An administrator is configuring DNS to allow Mobile and Remote Access logins for the domain cisco.com. Where must the _collab-edge_tls.cisco.com DNS SRV record be configured?

A : in the public DNS server

B : in DNS SRV settings under Cisco Unified OS Administration in Cisco UCM

C : in DNS settings in the Expressway-E on the interface that faces the Internet

D : in DNS settings under Cisco Unified OS Administration in Cisco UCM

Answer: A

Question 2

Refer to the exhibit. An engineer is deploying mobile and remote access in an environment that already had functioning Business to Business calling. Mobile and remote access SIP registrations are failing. To troubleshoot, SIP logs were collected. How is this issue resolved?

A : Change the SIP profile on the SIP trunk for the Expressway-E to Standard SIP Profile for TelePresence Endpoint

B : Change the “Incoming Port” in the SIP Trunk Security Profile for the Expressway-C to not match SIP line registrations

C : Enable autoregistration for the appropriate DN range on the Cisco UCM servers running the CallManager service

D : Write a custom normalization script since the “vcs-interop” normalization script does not allow registrations

Answer: B

Question 3

Which two licenses are required for the Expressway B2B feature to work? (Choose two)

A : Traversal Server

B : Advanced Networking

C : Device Provisioning

D : Rich Media Sessions

E : TURN Relays

Answer: A,D

Question 4

Which two licenses are required for the Expressway B2B feature to work? (Choose two)

A : Traversal Server

B : Advanced Networking

C : Device Provisioning

D : Rich Media Sessions

E : TURN Relays

Answer: A,D

Question 5

An engineer is investigating failing incoming calls that are expected to connect. The engineer notices that the failed calls all have a port number of 5060 at the end of the URI. The search rules are configured in a way that they do not expect a port to be included. Which configuration allows the routing of this call?

A : * transform with a pattern string of *(.*)@example.com(:5060)?"* replace a suing of \1@example.com

B : * search rule with a pattern string of “(.*)@example.com(:5050)?"* replace a string of \1\2@example com

C : search rule with a pattern string of “(.*)@example.com(:5060)?"* replace a string of \1@example.com\2

D : * transform with a pattern string of “(.*)@example.com(:5060)?"* replace a string of \1@example.com\2

Answer: A

Page: 1 / 41

Total 205 Questions | Updated On: Mar 12, 2026

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