300-820 · Question #115
300-820 Question #115: Real Exam Question with Answer & Explanation
The correct answer is B: The Unified Communications zone is down.. Traffic is coming from the internet so can not be the cisco_uds record, as it is created on the internal DNS only. Collab_edge is the external DNS record. It has to be port blocked or traversal technote-cucm-00.html#anc6
Question
Cisco Jabber clients are failing to log in using Mobile and Remote Access. The administrator checked the Jabber problem report logs and saw that connections to the Expressway-E are being refused on TCP port 8443. From a packet capture run on the Jabber client while attempting to log in, there is no response to the TCP SYN packets sent to the Expressway-E by Jabber. Which two reasons are causing the Expressway-E to be unreachable on port 8443 from the internet? (Choose two.)
Options
- AThe Jabber clients using an outdated version.
- BThe Unified Communications zone is down.
- CThe firewall is blocking the port.
- DThe certificate for Jabber is expired.
- EThe SRV record for _cisco-uds is misconfigured.
Explanation
Traffic is coming from the internet so can not be the cisco_uds record, as it is created on the internal DNS only. Collab_edge is the external DNS record. It has to be port blocked or traversal technote-cucm-00.html#anc6
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