What is an optional component in a Mobile and Remote Access solution?
Answer(s): D
Cisco Unity Connection is the voicemail system in a Cisco Collaboration environment. While it is commonly deployed alongside MRA solutions to provide voicemail services to remote users, it is not a mandatory component of the MRA architecture itself. MRA primarily focuses on enabling secure communication and remote access for endpoints.In a Mobile and Remote Access (MRA) solution, the following components are essential:Cisco Expressway-C: The internal component of the MRA architecture. It connects to Cisco UCM and facilitates communication between the internal network and Cisco Expressway-E.Cisco Expressway-E: The external-facing component that resides in the DMZ. It provides firewall traversal and secures communication for remote endpoints.Cisco Unified Communications Manager (UCM): Acts as the call control system, managing SIP endpoints and providing call routing.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-5/ exwy_b_mra-expressway-deployment-guide/exwy_b_mra-expressway-deployment-guide_chapter_00.html
A collaboration engineer needs to secure the connection between Cisco UCM and Cisco Unity Connection by using TLS. How must the engineer obtain a CA signed certificate for the connection?
Answer(s): C
To secure the connection between Cisco Unified Communications Manager (UCM) and Cisco Unity Connection using TLS, a Certificate Signing Request (CSR) must be generated on each server. The CSR is then submitted to a Certificate Authority (CA) to obtain a signed certificate. Once the certificate is received, it is installed on the respective server.Key Steps:1. Generate the CSR: On both Cisco UCM and Cisco Unity Connection servers, generate a CSR from their administrative interfaces. The CSR contains essential details, such as the server's hostname and public key.2. Submit the CSR to the CA: Provide the CSR to a trusted Certificate Authority (internal or external). The CA verifies the identity of the server and signs the certificate.3. Download and Install the Signed Certificate: After receiving the signed certificate from the CA, install it on each server. This certificate will be used to establish a secure TLS connection.4. Install the CA Certificate: Ensure the CA's root certificate is installed in the trust store of both Cisco UCM andCisco Unity Connection to establish mutual trust.By following the process of generating a CSR and submitting it to a CA, the engineer ensures that the certificates are correctly signed and installed, securing the connection between Cisco UCM and Cisco Unity Connection using TLS.
Refer to the exhibit. An engineer runs the utils diagnose test CLI command on a Cisco UCM subscriber and receives an error message during the validate_network test. What are two causes of the error? (Choose two.)
Answer(s): A,E
The utils diagnose test command on the Cisco UCM subscriber indicates a Reverse DNS Lookup Failed error during the validate_network test. This error implies an issue with the DNS server's ability to resolve PTR (reverse lookup) records for the Cisco UCM server's IP address.The DNS server is missing PTR records for the Cisco UCM servers:Reverse DNS resolution depends on PTR records in DNS. If these records are not present for the UCM servers, the reverse lookup will fail, leading to the observed error.The firewall is blocking UDP port 53 traffic from Cisco UCM to the DNS servers:DNS uses UDP port 53 for communication. If a firewall blocks this traffic, UCM cannot communicate with the DNS servers, resulting in a failure to perform reverse lookups.
https://community.cisco.com/t5/unified-communications-infrastructure/how-to-fix-quot-reverse-dns- lookup-failed-quot-on-cuc-subscriber/td-p/4163559https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager- callmanager/200396-Steps-to-Troubleshoot-Database-Replicati.html
Which two requirements should be considered when sizing Cisco UCM? (Choose two.)
Answer(s): B,C
When sizing Cisco Unified Communications Manager (UCM), it's essential to consider several factors to ensure optimal performance and scalability. Two primary considerations are:The total number of users directly impacts the system's capacity requirements. Each user may have multiple devices, and understanding the user count helps in determining the necessary resources.Anticipated call volume, including peak call rates and concurrent sessions, influences the processing power and bandwidth needed. Assessing traffic patterns ensures the system can handle the expected load without degradation.
https://www.cisco.com/c/en/us/td/docs/solutions/PA/size/SRND_sizing14/sizing14.html
What is the purpose of a DNS CNAME record?
Answer(s): A
A DNS CNAME (Canonical Name) record is used to create an alias for another domain name. It allows multiple domain names to point to the same hostname, which is useful for services like web hosting and content distribution.
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