Get 100% Authentic Cisco 300-820 Dumps with Correct Answers [Q86-Q109]

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Get 100% Authentic Cisco 300-820 Dumps with Correct Answers

New Training Course 300-820 Tutorial Preparation Guide

NO.86 What are two reasons why port 8443 is unreachable from the Internet to the Expressway-E? (Choose two.)

The MRA license is missing on the Expressway-E.

The Unified Communications zone is down.

Transform is not configured on Expressway-E.

The SRV record for _cisco-uds is misconfigured.

The firewall is blocking the port.

NO.87 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?

Rich Media Session licenses are not activated on Expressway-E.

Expressway-E is listening on the wrong IP interface.

The destination port for Expressway-E is set to 7400 instead of 8443 on the Expressway-C.

The XCP Service is not activated on Expressway-E.

NO.88 An engineer is investigating failing incoming calls that are expected to connect. The engineer notices that the failed calls all have a port number of 5060 at the end of the URI. The search rules are configured in a way that they do not expect a port to be included. Which configuration allows the routing of this call?

* transform with a pattern string of *(.*)@example.com(:5060)?”
* replace a suing of [email protected]

* search rule with a pattern string of “(.*)@example.com(:5050)?”
* replace a string of 12@example com

search rule with a pattern string of “(.*)@example.com(:5060)?”
* replace a string of [email protected]

* transform with a pattern string of “(.*)@example.com(:5060)?”
* replace a string of [email protected]

NO.89 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?

Ensure that the peer address does not match the Common Name on certificate.

Ensure that the _cisco-uds SRV record has been configured.

Ensure that the credential has been entered correctly.

Ensure that the SIP domains are added on Expressway Core.

NO.90 When a Cisco Webex Video Mesh Node is co figured for an organization, which process does the Webex Teams client use to discover the optimal bridging resource?

the lowest STUN round-trip delay to each node and cloud

a reachable Video Mesh Node and then overflows to the cloud, if needed

the SIP delay header during call setup

an HTTPS speed and latency test to each node and the cloud

NO.91 Which situation requires TCP port 443 to be open for packets that are sourced from the Internet with a destination in the corporate DMZ?

when video endpoints that reside on the Internet require administrative access to the Cisco Expressway Edge

when you require encrypted calls to endpoints on your corporate LAN

when you want to enable calls to web applications by using HTTP

when you require administrative access to the Cisco Expressway Edge from the Internet

NO.92 Refer to the exhibit.

In an environment SIP devices are registered to CUCM and H.323 devices to VCS. What would be required to enable these calls to setup correctly?

Create a presearch transform.

Change the domain of SIP endpoint A to cisco.com.

Disable SIP in the external zone.

Change the interworking mode to On.

NO.93 What should an engineer use to create users for a Cisco Jabber Cloud Deployment?

Cisco Webex Administration Tool

Cisco UCM

Cisco Webex Directory Connector

Cisco Unified IM and Presence Server

NO.94 Refer to the exhibit.

When a Jabber user attempts to connect from outside of the organization, the user enters the login information as “[email protected]” and receives the error “Cannot find your services Automatically”. The engineer tries to resolve SRV records used by Jabber.
DNS A record “expressway-e.example.com” points to the Expressway-E IP and “cucm.example.com” points to the Cisco Unified Communications Manager.
Which change resolves the DNS problem?

Change cisco-uds to point to the Expressway-E FQDN.

Change the collab-edge record to point to 5061.

Remove the cisco-uds SRV record for the external DNS.

Change the priority of the SRV record for cisco-uds.

NO.95 Which media encryption mode can be configured on an Expressway zone?

Advanced Encryption Standard

IPsec

Triple Data Encryption Standard

force unencrypted

NO.96 Refer to the exhibit.

While troubleshooting Cisco Jabber login issues, there are some error messages. Why is the Jabber client unable to sign in?

down Cisco Unified Communications Manager server

XMPP bind failures

incorrect login credentials

service discovery issues

NO.97 Which part of a hybrid cloud-based deployment with Cisco Webex Messenger Service is used for meeting capabilities?

Cisco Unified CM is always used for meeting capabilities.

Depending on the media flow, the Webex Meeting Center or local Cisco Unified CM meeting resources are used for meeting capabilities.

Depending on the origin of the user, the Webex Meeting Center or local Cisco Unified Communications Manager meeting resources are used for meeting capabilities.

Cisco Webex Meeting Center is always used for meeting capabilities.

NO.98

Refer to the exhibit. Which two numbers match the regular expression? (Choose two.)

d20d16d20d22

2091652010224

209165200225

d209d165d200d224

209165200224

NO.99 Cisco Collaboration endpoints are exchanging encrypted signaling messages.
What is one major complication in implementing NAT ALG for voice and video devices?

Internal endpoints cannot use addresses from the private address space.

The NAT ALG cannot inspect the contents of encrypted signaling messages.

NAT ALG introduces jitter in the voice path.

Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.

NO.100 When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is modified to reflect the NAT address?

SDP b-line

SIP record route

SDP c-line

SDP m-line

NO.101 What is a description of an Interactive Connectivity Establishment?

It is used by B2BUA to keep the firewall ports opened for inbound/outbound calls.

It allows Mobile and Remote Access endpoints to connect video calls signaling peer-to-peer.

It allows calling external endpoints with reduced overhead under VPN connections.

It is used to find the best media path between network elements in traversal calls.

NO.102 When determining why Mobile and Remote Access to Cisco TelePresence equipment does not work anymore for an organization. There are several administrators and configuration changes could have happened without anyone knowing. Internal communication seems to be working, but no external system can register or call anywhere. Gathering symptoms, you also discover that no internal systems can call out either.
What is TraversalZone missing that causes this issue?

link to the DefaultZone

pipe to the DefaultZone

SIP trunk to the DefaultZone

route pattern to the DefaultZone

NO.103

Refer to the exhibit. Cisco Unified Communications Manager routes the call via the Webex Meetings route list and route group to the Video Mesh cluster Node#1 in the Video Mesh cluster is hosting the meeting and has reached full capacity, but other nodes in the cluster still have spare capacity.
What happens to the participant’s call?

Another node in the cluster is used and an intra-cluster cascade between the two Video Mesh nodes is formed.

The call is queued.

The call fails.

Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.

NO.104 Refer to the exhibit.

Cisco Unified Communications Manager routes the call via the Webex Meetings route list and route group to the Video Mesh cluster Node#1 in the Video Mesh cluster is hosting the meeting and has reached full capacity, but other nodes in the cluster still have spare capacity.
What happens to the participant’s call?

Another node in the cluster is used and an intra-cluster cascade between the two Video Mesh nodes is formed.

The call is queued.

The call fails.

Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.

NO.105 Which configuration does Cisco recommend for the peer address on the Expressway-C secure traversal zone when the Expressway-E has one NIC enabled?

Expressway-E internal IP address

Expressway-E external IP address

Expressway-E internal FQDN

Expressway-E external FQDN

NO.106 Refer to the exhibit.

A new neighbor zone is added for a new Cisco Meeting Server, but the zone is showing a SIP status of failed from the time the zone it was created. What should be done to resolve this issue?

The search rule must be changed to continue on match

The existing zone using ID 7 must be deleted

More bandwidth must be added to the appropriate pipes

The underlying DNS issue must be resolved

NO.107 What happens to the encrypted signaling traffic of a collaboration device if you place it inside a firewall with private IP addresses and try to make a call over IP without any collaboration infrastructure?

The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.

Encrypted IP traffic for collaboration devices always is trusted by the firewall.

The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.

The signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.

NO.108 Which two considerations must be made when using Expressway media traversal? (Choose two.)

It is possible to NAT both Expressway-E interfaces

The Unified Communications traversal zone should be used for MRA

The Expressway-E must be put in a firewall DMZ segment

Expressway Control is the traversal server installed in the DMZ

Cisco UCM zone should be either traversal server or client

NO.109 What is a key configuration requirement for Hybrid Message Service High Availability deployment with multiple IM and Presence clusters?

You must have the Intercluster Sync Agent working across your IM and Presence clusters.

You must have the Intercluster Lookup Service working across all of your IM and Presence clusters.

Your IM and Presence Service clusters must have Multiple Device Messaging disabled.

AXL service should be activated only on the publisher of each IM and Presence cluster.

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