Implementing Cisco Collaboration Conferencing (CLCNF) Free Sample Questions

The TURN (Traversal Using Relays around NAT) server on the Expressway-E is responsible for relaying media packets for WebRTC clients that cannot establish a direct peer-to-peer connection. When the firewall blocks outbound UDP traffic from the Expressway-E, the TURN server cannot send the client's relayed video stream back out to the internet, resulting in one-way video. The client can receive video because inbound UDP is allowed, but their own video stream is dropped at the firewall.

Synchronous replication ensures that a transaction is written to both the master and standby databases before it is committed. This minimizes the risk of data loss during a failover, which is a critical requirement for a financial institution.

In a CMS database cluster, failover is a manual process. The database cluster promote command must be run on the standby server to make it the new master. Automating this process via a script triggered by monitoring checks is the standard best practice to minimize manual intervention and reduce recovery time.

When using TLS verification, the Expressway-C must be configured to trust the subject name presented in the certificate from the connecting peer. In an integration with Skype for Business, the FQDN of the SfB Front End server must be explicitly added to the 'TLS verify subject name' list in the corresponding traversal client zone on the Expressway-C. If this name is missing, Expressway-C will reject the connection as untrusted.

The correct MMP command to initiate a backup is backup snapshot. The syntax requires the username, the server IP address or FQDN, and the target filename, separated by an '@' and a ':'. This command uses SFTP, a secure protocol, to transfer the backup file.

In a single split deployment, the CMS server in the DMZ (the Edge server) handles external connectivity. The Web Bridge is the component that serves the web application to browser-based clients and terminates their media and signaling. Therefore, it is essential to enable the Web Bridge on the Edge server to facilitate external WebRTC access.

The Meetings Dashboard in Cisco Meeting Management is the primary landing page and is designed to provide a high-level, at-a-glance summary. It shows key performance indicators such as the number of active meetings and participants, license usage, and a summary of call quality (good, fair, poor), which directly addresses the operations team's requirements.

SIP Route Patterns are used in CUCM specifically to route calls based on the domain portion of a SIP URI. The engineer would configure a SIP Route Pattern for the domain conferencing.example.com and associate it with the SIP trunk pointing to the Cisco Meeting Server. This ensures that any URI call matching that domain is sent to the CMS.

A Single Combined Meeting Server deployment places all CMS components (Call Bridge, Web Bridge, Database, etc.) on one server. To provide secure external access without placing the CMS directly on the internet, it must be paired with an Expressway-C/E. This model is ideal for small deployments as it minimizes server footprint and simplifies management while still providing secure firewall traversal for external participants.

The rxPacketLossLatest metric from the CMS API represents the percentage of packets lost on the receive (rx) path from the participant's endpoint to the Call Bridge. A high value indicates that the network path from the client to the server is experiencing issues, causing the Call Bridge to not receive all the media packets sent by the endpoint.

The certificate must contain the FQDN of the server hosting the service to allow clients to verify its identity. For the Call Bridge, its own resolvable FQDN is a mandatory SAN entry.

To support SIP TLS calls, the certificate on the Call Bridge must include the domain part of the meeting URIs (e.g., if spaces are [email protected], then meetings.company.com must be a SAN). This allows SIP clients to validate the server when making a call.