Mobile & Remote Access – 25%

To deal with the questions from this domain, the examinees need to prove that they are proficient in:

• Configuring a Mobile & Remote Access solution (including DNS records types; certificates, HTTP allow list; Unified Communications traversal zones; Unified Communications configuration within Expressway; SIP trunk security profile within Cisco Unified Communications Manager);
• Troubleshooting a Mobile & Remote Access solution.

Reference: https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/clcei-300-820.html

Cisco 300-820 Exam Topics:

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Core Concepts – 25%

Within this topic, the applicants should prove that they are capable of performing the following tasks:

• Describing the function of TURN, STUNI, and ICE;
• Describing the SIP media encryption mode (including auto; best effort; force unencrypted; force encrypted);
• Describing the core Expressway settings (including network interfaces; certificates; DNS; QoS; network firewall rules; clustering);
• Describing protocol interworking within Expressway (including SIP < > H.323 as well as IPv4 & IPv6);
• Describing Expressway Licensing (including option keys; license consumption; release key);
• Describing the Expressway backup as well as restoring procedure (cluster & stand alone).
• Describing Expressway media traversal;
• Describing the Expressway Core dial plan components (including transforms; zones; regular expressions; search rules; pipes & links);
• Describing the complexities of NAT within a Collaboration environment;

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