Cisco 300-820 Practice Exams
Last updated on Oct 22,2026- Exam Code: 300-820
- Exam Name: Implementing Cisco Collaboration Cloud and Edge Solutions (CLCEI)
- Certification Provider: Cisco
- Latest update: Oct 22,2026
Refer to the exhibit.
When Expressway-E routes a call with URI [email protected] to a DNS zone, which DNS server does the Expressway query for the SIP SRV records?
- A . 10.20.20.20
- B . 10.10.10.10
- C . 10.40.40.40
- D . 10.30.30.30
Which media encryption mode can be configured on an Expressway zone?
- A . Advanced Encryption Standard
- B . IPsec
- C . Triple Data Encryption Standard
- D . force unencrypted
Cisco Jabber clients are failing to log in using Mobile and Remote Access. The administrator checked the Jabber problem report logs and saw that connections to the Expressway-E are being refused on TCP port 8443. From a packet capture run on the Jabber client while attempting to log in, there is no response to the TCP SYN packets sent to the Expressway-E by Jabber.
Which two reasons are causing the Expressway-E to be unreachable on port 8443 from the internet? (Choose two.)
- A . The Jabber clients using an outdated version.
- B . The Unified Communications zone is down.
- C . The firewall is blocking the port.
- D . The certificate for Jabber is expired.
- E . The SRV record for _cisco-uds is misconfigured.
Cisco Collaboration deployment has video endpoints that can do B2B calls over the internet, but they also can make audio calls through a gateway. This ability means that someone from the internet can make fraud calls through the system.
Which action must an engineer take to set up the search rules for calls that are being headed to the PSTN gateway?
- A . Ensure that only requests that are authenticated are allowed to make a PSTN call.
- B . Avoid using any wild card in the source settings in the search rules.
- C . Add registered devices only in the search rule for the PSTN gateway.
- D . Add registered devices only in the zone for the PSTN gateway.
Refer to the exhibit.
The administrator attempted to log in, but Jabber clients cannot log in via mobile and remote access.
How is this issue resolved?
- A . Skype for Business mode must be disabled on the DNS server because it conflicts with Jabber login requirements.
- B . The domain pod1.local must be deprovisioned from the Webex cloud for Jabber logins.
- C . A DNS SRV record must be created for _collab-edge._tls.pod1.local that points to the Expressway-E.
- D . The username [email protected] is invalid. The user should instead sign-in simply as jabberuser.
Which action is required when using Cisco Jabber for Cloud with Cisco Webex Messenger?
- A . Configure, extend, and connect.
- B . Configure policies.
- C . Configure service discovery for remote access.
- D . Configure desk phone control.
Jabber cannot log in via Mobile and Remote Access.
You inspect Expressway-C logs and see this error message:
XCP_JABBERD Detail="Unable to connect to host ‘%IP%’, port 7400:(111) Connection refused"
Which is the cause of this issue?
- A . Rich Media Session licenses are not activated on Expressway-E.
- B . Expressway-E is listening on the wrong IP interface.
- C . The destination port for Expressway-E is set to 7400 instead of 8443 on the Expressway-C.
- D . The XCP Service is not activated on Expressway-E.
Refer to the exhibit.
Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)
- A . XMPP: TCP 7400
- B . SIP: TCP 7001
- C . SIP TCP 5061
- D . Media: UDP 36012 to 59999
- E . HTTPS: TCP 8443
AB
Explanation:
Reference: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/cong_guide/X12-5/Cisco-Expressway-IP-Port-Usage-for-Firewall-Traversal-Deployment-Guide-X12-5.pdf
What is the first step to restoring an Expressway cluster from a backup?
- A . use the backup that is specific to each Expressway peer in the cluster
- B . upgrade each Expressway peer to the latest Expressway software
- C . remove each Expressway peer from the cluster
- D . add all the Expressway peers to the cluster
Refer to the exhibit.
Call policy rules on an Expressway-E prevent external callers from the internet from calling a VIP whose URI is [email protected].
Which additional configuration setting is required for this call policy to function as intended?
- A . The default zone on the Expressway-E must not be configured to treat as authenticated.
- B . A search rule must be configured with an extract match for [email protected] to pass the call to the Expressway-C.
- C . The Cisco TelePresence endpoint registered with the URI [email protected] must be set in “do not disturb” mode.
- D . SIP TLS must be disabled on the Expressway-E.