[Nov-2025] Cisco 300-820 Dumps – Reduce Your Chance of Failure in 300-820 Exam
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NEW QUESTION # 115
An administrator installs a new webserver (server1.example.com - 10.1.1.90) for storing Cisco Jabber update files to the network, but all Mobile and Remote Access registered clients still run the old Jabber software version, and the update fails. Which configuration task on an Expressway server solves the Jabber software update issue?
- A. Run an IM and Presence server discovery process on Expressway-C to add the new web server to the inbound HTTP allow list automatically.
- B. Add a rule with the URL http://server1.example.com:80/ to the inbound HTTP allow list manually to allow access to the new web server.
- C. Add a rule with the server IP address 10.1.1.90 in the URL to the inbound HTTP allow list because server names and FQDNs are not supported.
- D. Add a rule with the URL http://server1.example.com:80/ to the outbound HTTP allow list manually to allow pushing the new software to the clients.
Answer: B
NEW QUESTION # 116
What is the benefit of configuring ICE, TURN and STUN in a Cisco Unified Collaboration environment?
- A. The endpoints discover paths to optimize media flow and allows for peer-to-peer media traffic in some cases.
- B. The endpoints use fewer ports to minimize the port range and allows for multiple connections in a high-density deployment.
- C. It can traverse firewalls without opening incoming ports.
- D. The ICE protocol enables the use of MRA for Cisco endpoints to register behind the firewall.
Answer: A
NEW QUESTION # 117
How are Cisco Webex Video Mesh deployments supported?
- A. Clustering Video Mesh Nodes over the WAN are supported if Round Trip Time is low.
- B. Mixed Single NIC and Dual NIC are supported in the same data center deployments.
- C. Video Mesh Dual NIC are supported in demilitarized deployments.
- D. IPv6 and IPv4 deployments are supported for Video Mesh clusters.
Answer: C
NEW QUESTION # 118
Which two considerations must be made when using Expressway media traversal? (Choose two.)
- A. Expressway Control is the traversal server installed in the DMZ
- B. The Unified Communications traversal zone should be used for MRA
- C. It is possible to NAT both Expressway-E interfaces
- D. The Expressway-E must be put in a firewall DMZ segment
- E. Cisco UCM zone should be either traversal server or client
Answer: B,D
NEW QUESTION # 119
What is the last step for domain management in Cisco Webex Control Hub if an engineer adds users already signed in with the company domain?
- A. Publish a domain.
- B. Verify a domain.
- C. Claim a domain.
- D. Add a domain.
Answer: C
NEW QUESTION # 120
Which two statements about Expressway-C / Expressway-E Firewall Traversal are correct?
(Choose two.)
- A. The communications between Expressway-C and Expressway-E are always initiated from the Expressway-E to the Expressway-C.
- B. SIP or H.323 "fixup" ALG or awareness functionality must be enabled on the NAT firewalls.
- C. SIP or H.323 "fixup" ALG or awareness functionality must be disabled on the NAT firewalls.
- D. SIP or H.323 "fixup" ALG or awareness functionality must be enabled on the NAT firewall between the DMZ and the Internet only.
- E. The communications between Expressway-C and Expressway-E are always initiated from the Expressway-C to the Expressway-E.
Answer: C,E
NEW QUESTION # 121
Refer to the exhibit.
Which inbound connection should an administrator configure on the outside firewall?
- A. XMPP TCP 5222
- B. Media: UDP 36000 to 36011
- C. HTTPS (tunneled over SSH between C and E): TCP 2222
- D. SIP TCP 5061
Answer: B
NEW QUESTION # 122
Which two types of information does Cisco Expressway back up? (Choose two.)
- A. call records
- B. current call states
- C. security certificates
- D. log files
- E. IP addresses
Answer: A,C
Explanation:
The data saved to a backup file includes:
- Bootstrap key (from X8.11)
- System configuration settings
- Clustering configuration
- Local authentication data (but not Active Directory credentials for remotely managed accounts)
- User account and password details
- Server security certificate and private key
- Call detail records (if the CDR service on Expressway is enabled)
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco- Expressway-Administrator-Guide-X8-11-4.pdf
NEW QUESTION # 123
An engineer is supporting an existing Cisco Collaboration deployment that has internal and external home users using the solution without VPN. Business usage also includes B2B calling for voice and video. Suddenly the engineer receives a report that one of the home office users cannot use the Cisco Jabber client, and shortly after, a few more reports come in for the same error. What must the engineer check first to resolve this issue?
- A. client logs of the users
- B. alarms on the Cisco UCM Cluster
- C. alarms on the Cisco Expressways
- D. real-time monitoring toll logs for problems
Answer: C
NEW QUESTION # 124
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. A DNS SRV record must be created for _collab-edge._tls.pod1.local that points to the Expressway-E.
- B. The username [email protected] is invalid. The user should instead sign-in simply as jabberuser.
- C. The domain pod1.local must be deprovisioned from the Webex cloud for Jabber logins.
- D. Skype for Business mode must be disabled on the DNS server because it conflicts with Jabber login requirements.
Answer: A
NEW QUESTION # 125
A Webex administrator is configuring the Webex Control Hub to enable enterprise users to sign into Webex securely by authenticating to the IdP of the organization. To conform to the SAML specification, to what can the NameID format be set?
- A. urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress
- B. urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress
- C. urn:oasis:names:tc:SAML:2.0:nameid-format:transient
- D. urn:oasis:names:tc:SAML:2.0:nameid-format:unspecified
Answer: C
Explanation:
https://help.webex.com/en-us/article/lfu88u/Single-Sign-On-Integration-in-Control- Hub#CMGT_TP_S41BS518_00
NEW QUESTION # 126
Refer to the exhibit.
Cisco Unified Communications Manager routes the call via the Webex Meetings route list and route group to the Video Mesh cluster Node#1 in the Video Mesh cluster is hosting the meeting and has reached full capacity, but other nodes in the cluster still have spare capacity.
What happens to the participant's call?
- A. Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.
- B. The call fails.
- C. Another node in the cluster is used and an intra-cluster cascade between the two Video Mesh nodes is formed.
- D. The call is queued.
Answer: A
NEW QUESTION # 127
Refer to the exhibit.
While troubleshooting Cisco Jabber login issues, there are some error messages. Why is the Jabber client unable to sign in?
- A. service discovery issues
- B. down Cisco Unified Communications Manager server
- C. incorrect login credentials
- D. XMPP bind failures
Answer: D
Explanation:
Explanation
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-5/Mobile-Remote-Ac
NEW QUESTION # 128
An engineer must enable the communication between two separate Expressway-C servers to allow inbound and outbound calling between different endpoints registered on each server. Which configuration must happen?
- A. Configure a transform on each server to strip the port numbers at the end of the alias.
- B. Configure a traversal zone on each server with a destination of the other Expressway-C.
- C. Configure a neighbor zone on each server with a destination of the other Expressway-C.
- D. Configure a transform on each server to convert the calling alias into the called alias.
Answer: C
NEW QUESTION # 129
When external video endpoints are called via a DNS zone, which dialing method requires DNS to be configured in the Expressway server?
- A. E.164
- B. IP dialing
- C. DN dialing
- D. URI dialing
Answer: D
NEW QUESTION # 130
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