cisco 300-820 practice test
Implementing Cisco Collaboration Cloud and Edge
Question 1
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.
Answer:
B
Explanation:
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.
Question 2
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. down Cisco Unified Communications Manager server
- B. XMPP bind failures
- C. incorrect login credentials
- D. service discovery issues
Answer:
B
Question 3
What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco
Collaboration infrastructure?
- A. ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.
- B. ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.
- C. ICE uses FAST updates to optimize the video quality in case of packet loss. This technology is available only from Cisco Unified CM version 11.5 and later.
- D. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.
Answer:
B
Question 4
A company already has a Cisco Unified Communications Manager for internal audio and video traffic,
but it requires video communication with external partners and customers. It is important to ensure
security for the deployment and the connectivity.
What must be set up to enable this requirement?
- A. Cisco Unified Border Element and Cisco ASA Firewall
- B. Cisco Unified Border Element and Cisco Firepower Firewall
- C. Cisco Expressway-C and Cisco Expressway-E
- D. Cisco Expressway-C and Cisco Unified Border Element
Answer:
C
Question 5
When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access,
which TLS verify subject name must be configured on the Expressway-E UC traversal zone?
- A. Webex CUSP Cluster Name
- B. Expressway-E Cluster Name
- C. Cisco Unified Communications Manager Publisher FQDN
- D. Expressway-C Cluster Name
Answer:
D
Question 6
When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is
modified to reflect the NAT address?
- A. SDP b-line
- B. SIP record route
- C. SDP c-line
- D. SDP m-line
Answer:
C
Question 7
Refer to the exhibit.
Mobile Cisco Jabber cannot register with on-premises Cisco Unified Communications Manager using
Mobile and Remote Access. Some logs were captured on Expressway Edge.
Which action corrects this problem?
- A. Ensure that the peer address does not match the Common Name on certificate.
- B. Ensure that the _cisco-uds SRV record has been configured.
- C. Ensure that the credential has been entered correctly.
- D. Ensure that the SIP domains are added on Expressway Core.
Answer:
C
Question 8
Which two statements about Expressway media traversal are true? (Choose two.)
- A. Expressway Control is the traversal server installed in the DMZ.
- B. The Expressway Edge must be put in a firewall DMZ segment.
- C. Cisco Unified Communications Manager zone can be either traversal server or client.
- D. The Unified Communications traversal zone can be used for Mobile and Remote Access.
- E. Both Expressway Edge interfaces can be NATed.
Answer:
BD
Question 9
Which zone is required between Expressway-E and Expressway-C in Mobile and Remote Access
deployments?
- A. Unified Communications traversal zone
- B. neighbor zone
- C. DNS zone
- D. traversal zone
Answer:
A
Question 10
Refer to the exhibit.
What is the result of a transformation applied to alias 88514?
- A. [email protected]
- B. 88513@ccnpcollab com
- C. [email protected]
- D. [email protected]
Answer:
C
Question 11
Which part of a hybrid cloud-based deployment with Cisco Webex Messenger Service is used for
meeting capabilities?
- A. Cisco Unified CM is always used for meeting capabilities.
- B. Depending on the media flow, the Webex Meeting Center or local Cisco Unified CM meeting resources are used for meeting capabilities.
- C. Depending on the origin of the user, the Webex Meeting Center or local Cisco Unified Communications Manager meeting resources are used for meeting capabilities.
- D. Cisco Webex Meeting Center is always used for meeting capabilities.
Answer:
D
Question 12
For a Mobile and Remote Access deployment, which server's certificate must include the Unified
registration domain as a Subject Alternate Name?
- A. Expressway-C server certificate
- B. Cisco Unified Communications Manager server certificate
- C. Expressway-E server certificate
- D. Expressway-C and Expressway-E server certificate
Answer:
C
Question 13
Which step is required when configuring Cisco Webex Hybrid Message Service?
- A. Register Expressway-C Connector Hosts to the Cisco Webex Cloud.
- B. Register Expressway-C to Cisco Unified Communications Manager.
- C. Add Expressway-C and Cisco United CM to the Cisco Webex Cloud.
- D. Add Cisco Unity Connection to Expressway-E.
Answer:
A
Question 14
When configuring a Cisco Expressway solution and need to design the dial plan with various rules for
URIs and numbers coming through the device. To do so, it is important that some dial plan rules are
applied in a certain order. When configuring the transform section, you must know the range of the
priorities.
Which range is correct?
- A. any number in the drop-down menu
- B. any number in the dialog box
- C. any number between 1-128
- D. any number between 1-65534
Answer:
D
Question 15
Which zone is required on a B2B deployment between Expressway-C and Expressway-E?
- A. traversal zone
- B. DNS zone
- C. default zone
- D. neighbor zone
Answer:
A