[2026年02月16日] 最新の300-820試験の的確なImplementing Cisco Collaboration Cloud and Edge SolutionsのPDF問題
300-820試験問題を練習するならFast2test顕著なImplementing Cisco Collaboration Cloud and Edge Solutions試験練習問題集
質問 # 46
With QoS enabled, which two statements about the Cisco Webex Video Mesh Node signaling and media traffic are true? (Choose two.)
- A. From Webex cloud to VMN, the source UDP port 9000 is used for audio traffic.
- B. From VMN to Webex Teams clients, the source UDP port 5004 is used for video traffic.
- C. From VMN to video endpoints, the destination UDP port 5004 is used for audio traffic.
- D. From VMN to CUCM SIP endpoints, the source UDP ports from 52500 to 62999 is used for audio traffic.
- E. From VMN to Webex cloud, the destination UDP port 9000 is used for video traffic.
正解：B、D
解説：
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/videomesh/cmgt_ b_webex-video-mesh-deployment-guide/cmgt_b_hybrid-media-deployment- guide_chapter_010.html#reference_CAE1A60E80AE6EC7BF96DAE7980D792D
質問 # 47
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. 10.10.10.10
- B. 10.20.20.20
- C. 10.30.30.30
- D. 10.40.40.40
正解：B
質問 # 48
What is a benefit of Cisco Webex Messenger Cloud deployment?
- A. Cloud deployment allows interoperability between Cisco Jabber and Webex Teams users.
- B. There is no additional cost to use a cloud deployment.
- C. Cloud deployment is faster than using an on-premises deployment.
- D. Cloud deployment is more secure than an on-premises deployment.
正解：A
解説：
Cisco Webex Messenger integrates with Cisco Unified Communications Manager and Cisco Webex Meeting Center to support click-to-call, phone control, voice, video, visual voicemail, and web collaboration. It allows you to communicate and collaborate effectively from anywhere you have an Internet connection.
質問 # 49
When a Cisco Webex Video Mesh Node is co figured for an organization, which process does the Webex Teams client use to discover the optimal bridging resource?
- A. the lowest STUN round-trip delay to each node and cloud
- B. a reachable Video Mesh Node and then overflows to the cloud, if needed
- C. an HTTPS speed and latency test to each node and the cloud
- D. the SIP delay header during call setup
正解：B
解説：
https://www.cisco.com/c/en/us/solutions/collateral/unified-communications/spark-hybrid- services/datasheet-c78-738153.html
質問 # 50
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.
正解：B
解説：
The error message "XCP_JABBERD Detail='Unable to connect to host '%IP%', port 7400:(111) Connection refused'" indicates that the Expressway-C is unable to establish a connection with the Expressway-E on port 7400, which is used for the Extensible Communications Platform (XCP) session required for Jabber's Mobile and Remote Access (MRA) functionality. This issue is commonly associated with network or configuration problems on the Expressway-E.
According to Cisco documentation, the primary cause of this error is that the Expressway-E is listening for the XCP session on the wrong network interface, which causes the connection to fail or timeout. The Expressway-E listens on TCP port 7400 for the XCP session, and this can be verified using the netstat command from the VCS as root. If the Expressway-E is configured with an incorrect network interface (e.g., due to a single NIC configuration or misconfigured Advanced Networking Option), the XCP session cannot be established, resulting in the "Connection refused" error.
Option A (Rich Media Session licenses are not activated on Expressway-E): This is incorrect because Rich Media Session licenses are related to call control for media sessions (e.g., SIP or H.323 calls) and not directly to the XCP session used for Jabber's MRA functionality. The error specifically points to a connection issue on port 7400, not a licensing problem.
Option B (Expressway-E is listening on the wrong IP interface): This is the correct answer. As per Cisco's troubleshooting guide, the Expressway-E may listen on an incorrect network interface, especially in scenarios where the Advanced Networking Option is enabled or a single NIC is used. This misconfiguration prevents the Expressway-C from connecting to the Expressway-E on port 7400, leading to the connection refusal.
Option C (The destination port for Expressway-E is set to 7400 instead of 8443 on the Expressway-C): This is incorrect because port 7400 is the correct port for the XCP session between Expressway-C and Expressway-E in MRA deployments. Port 8443 is used for HTTPS traffic (e.g., configuration downloads or UDS queries), not for XCP. The error indicates a connection issue on port 7400, not a misconfigured port.
Option D (The XCP Service is not activated on Expressway-E): This is unlikely because if the XCP service were not activated, the error might indicate a service failure or unavailability rather than a "Connection refused" error, which specifically points to a network-level issue. Additionally, the XCP service is typically enabled by default for MRA functionality.
Exact Extract from Cisco Documentation:
"The reason this is a problem is because Expressway-E listens for the XCP session on the wrong network interface, which causes the connection to fail/timeout. Expressway-E listens on TCP port 7400 for the XCP session. You can verify this if you use the netstat command from the VCS as root. If Expressway-E Network Interface Controller (NIC) is incorrectly configured, this can cause the Extensible Communications Platform (XCP) server to not be updated. If Expressway-E meets these criteria, then you will probably encounter this issue: Uses a single NIC. Advanced Networking Option Key is installed." Source: Cisco Document - Resolve Collaboration Edge Most Common Issues, Published 2024-09-03.
Additional Notes: To resolve this issue, ensure that the Expressway-E is configured to listen on the correct network interface for the XCP session. This may involve checking the NIC configuration, disabling the Advanced Networking Option if not needed, or verifying firewall rules to ensure that traffic on port 7400 is allowed between Expressway-C and Expressway-E. Additionally, confirm that the DNS and SRV records (_collab-edge) are correctly configured to resolve to the Expressway-E's proper interface.
Reference:
Cisco Document: Resolve Collaboration Edge Most Common Issues, Published 2024-09-03.
CCNP Collaboration Cloud and Edge Solutions CLCEI 300-820 Official Cert Guide, Cisco Press, Published 2021-11-24, Chapter on Mobile and Remote Access Configuration.
Implementing Cisco Collaboration Cloud and Edge Solutions (CLCEI) v1.0 Course, Section on Troubleshooting MRA Issues.
質問 # 51
Which technique can be used to have media flow directly between two endpoints that have a NAT between them?
- A. The endpoints can use a Cisco router API to disable NAT temporarily.
- B. Cisco access protocol can make a direct path between endpoints on an internal network.
- C. Cisco Mobile and Remote Access allows for media traffic directly between two internal endpoints.
- D. STUN makes UDP connections through NAT devices.
正解：D
質問 # 52 
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. Enable autoregistration for the appropriate DN range on the Cisco UCM servers running the CallManager service
- C. Write a custom normalization script since the "vcs-interop" normalization script does not allow registrations
- D. Change the "Incoming Port" in the SIP Trunk Security Profile for the Expressway-C to not match SIP line registrations
正解：D
質問 # 53
What is the Cisco-recommended key length in bits for a Cisco Expressway certificate?
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
解説：
SIP TLS zones may fail to become active if certificates use a key length of 8192 bits. We recommend using certificates with a key length of 4096 bits.
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-
9/Cisco-Expressway-Certificate-Creation-and-Use-Deployment-Guide-X8-9.pdf
質問 # 54
Refer to the exhibit.
An Expressway-C and Expressway-E are configured for B2B calling and the Expressway- E zone is set to TLS Verify Currently, calls do not reach the Expressway-C. The Traversal Client zone on the Expressway-C for B2B reports the information in the exhibit for the Peer 1 address.
Which action resolves this error?
- A. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.
- B. Configure the Expressway-C Traversal Client zone transport protocol with TCP.
- C. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
- D. Add a server certificate to the Expressway-C that is signed by a certificate authority.
正解：D
質問 # 55
Refer to the exhibit.
Refer to the exhibit. An engineer must configure a B2B traversal zone. Trusted certification authority and server certificates are uploaded to Cisco Expressway-C and Expressway-E servers. After the traversal zone configuration is completed in Expressway-C, the error message in the exhibit appears. What are the two reasons for the error? (Choose two.)
- A. The peer 1 address in Expressway-C is not the FADN of Expressway-E.
- B. The traversal zone TLS verify subject name in Expressway-E does not match the FQDN of Expressway-C.
- C. The communication port is not set to 7001.
- D. The FQDN of Expressway-E cannot be resolved by the DNS server.
- E. The peer 1 address in Expressway-C must be replaced by the FQDN of Expressway-C.
正解：A、E
質問 # 56
What is the Cisco-recommended key length in bits for a Cisco Expressway certificate?
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
質問 # 57
An administrator is enabling Mobile and Remote Access login for the Cisco UCM registration domain cisco.com. Phones are registered with a Cisco UCM phone security profile name of securephone.cisco.com. Which two subject alternative names must be configured? (Choose two.)
- A. cisco.com on the Expressway-E certificate
- B. Securephone.cisco.com on the Expressway-E certificate
- C. cisco.com on the Expressway-C certificate
- D. Securephone.cisco.com on the Expressway-C certificate
- E. Securephone.cisco.com on the CallManager certificate
正解：A、D
質問 # 58
When a Cisco Webex Video Mesh Node is configured for an organization, which process does the Webex Teams client use to discover the optimal bridging resource?
- A. the lowest STUN round-trip delay to each node and cloud
- B. a reachable Video Mesh Node and then overflows to the cloud, if needed
- C. an HTTPS speed and latency test to each node and the cloud
- D. the SIP delay header during call setup
正解：B
質問 # 59
Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?
- A. _cisco-uds-edge on port 5061
- B. _cisco-uds on port 8443
- C. _collab-edge on port 5061
- D. _collab-edge on port 8443
正解：D
解説：
Explanation
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-5/exwy_b_mra-expressw
質問 # 60
Refer to the exhibit.
When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?
- A. 13358 is sent directly to the traversal zone.
- B. 13358 is replaced by 135, and then is sent to the traversal zone.
- C. 13358 is replaced by 135, and then is sent to the local zone.
- D. 13358 is replaced by 135 and remains in the same zone.
正解：A
質問 # 61
Refer to the exhibit.
Mobile and remote access is being added to an existing B2B deployment and is failing.
When the administrator looks at the alarms on the Expressway-C, the snippets are shown. Which configuration action should the administrator take to fix this issue?
- A. The listening port on the Cisco UCM for the Expressway-C SIP trunk is set to something other than 5060 or 5061. It must be set to 5060 for insecure and 5061 for secure SIP
- B. The listening port on the Expressway-C for SIP TLS must be changed to a value other than 5061
- C. The listening port on the Expressway-C for SIP TCP must be changed to a value other than 5060
- D. The listening port on the Cisco UCM for the Expressway-C SIP trunk must be changed to something other than 5060 or 5061
正解：C
質問 # 62
Refer to the exhibit.
An ISDN gateway is registered to Expressway-C with a prefix of 9 and/or it has a neighbor zone specified that routes calls starting with a 9.
Which value should be entered into the "Source" field to prevent toll fraud regardless at origin of the call?
- A. Any
- B. Neighbor Zone
- C. All
- D. Traversal Zone
正解：C
質問 # 63
Refer to the exhibit. You have Cisco Expressway using SIP for external calls. SIP Nat/Alg is configured on the edge firewall. The call fails with one way audio. Which problem with the configuration?
- A. The security certificate used by Cisco Expressway is not valid
- B. Secure SIP (TLS) is not supported by the firewall.
- C. SIP NAT is not enabled for TLS
- D. The Apache service was not restarted on Cisco Unified Communications Manager after SIP TLS was configured.
正解：C
質問 # 64
An engineer attempts to upload a server certificate to an Expressway-C server but receives an error when they click the upload button that says that the file is invalid. The engineer is advised that this happens because the certificate was signed incorrectly and is missing an attribute. What must the engineer do to upload the certificate?
- A. Create a certificate request via Certificate Services Web Page and ensure that the certificate validity period is five years because the Expressway server validates this during certificate import.
- B. Create a new certificate template with the certificate attribute "Allow private key to be exported" enabled and use this template when signing the Expressway server certificate.
- C. Create a certificate request via the Certificate Services Web Page and ensure that the Subject Common Name field contains the server FQDN and all Cisco Unified CM phone security profile names.
- D. Create a new certificate template with "Server authentication" and "Client authentication" enabled and use this template when signing the Expressway server certificate.
正解：D
解説：
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X15-
0/mra/exwy_b_mra-deployment-guide-x150.pdf
質問 # 65
An engineer is configuring the Expressway cluster to allow Jabber clients that are outside the enterprise network to register, make calls, and send instant messages using the internal Cisco UCM. Which action must be taken before a secure UC traversal zone is added to the Expressway-C?
- A. Establish certificate trust between the Expressway-C and Expressway-E.
- B. Add Instant Message and Presence service clusters.
- C. Add a Cisco UCM cluster.
- D. Configure SIP OAuth mode.
正解：A
質問 # 66
Which two licenses are required for the Expressway B2B feature to work? (Choose two)
- A. Advanced Networking
- B. TURN Relays
- C. Rich Media Sessions
- D. Traversal Server
- E. Device Provisioning
正解：C、D
質問 # 67
Which option mandates that calls fall back to unencrypted media if encryption cannot be established?
- A. force encrypted
- B. best effort
- C. auto
- D. force unencrypted
正解：B
質問 # 68
Which protocol and port are used for signaling between on-premises Cisco Webex Video Mesh Nodes and Cloud Media Services?
- A. standard SIP TLS over TCP port 5061
- B. signaling over HTTPS TCP port 443
- C. standard SIP over TCP port 5060
- D. signaling over TCP port 444
正解：B
解説：
質問 # 69
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Cisco 300-820試験は、60から70問の試験で、形式には多肢選択、ドラッグアンドドロップ、シミュレーションタイプが含まれる場合があります。この認定試験に受験するためには、候補者はクラウドおよびエッジソリューションの展開と設定の経験を持っている必要があります。 Cisco 300-820試験は、Cisco Webex、Cisco Umbrella、Cisco Expressway、Cisco Meeting Serverの展開など、その他の技術もカバーしています。
試験問題と解答は300-820学習ガイド問題解答：https://jp.fast2test.com/300-820-premium-file.html
練習用300-820にはFast2test顕著な問題集はあなたをImplementing Cisco Collaboration Cloud and Edge Solutions試験合格させます合格させる：https://drive.google.com/open?id=1gGrpvMHfC9ua07dD_Vz-uQLtN7YiQQLB