08 July, 2020

What Simulation 300-820 Testing Software Is

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Question 1

What is the purpose of a transform in the Expressway server?

A transform has the function as a neighbor zone in the Expresswa

It creates a connection with another server.

A transform changes the audio codec when the call goes through the Expressway.

A transform is used to route calls to a destination.

A transform changes an alias that matches certain criteria into another alias.

Question 2

Which two statements about Cisco Webex Video Mesh Nodes are true? (Choose two.)

When Expressway Core works with VMN clusters, Expressway Core decides which VMN is used for signaling/media connection.

Cloud-registered devices choose a VMN cluster based on the lowest STUN round trip delay.

The cascading traffic between VMN must bypass the firewall.

When Cisco Unified Communications Manager works with multiple VMNs, Cisco Unified CM decides which VMN is used for signaling connection.

A VMN can terminate a media connection while operating in maintenance mode.

Question 3

Which two statements about Mobile and Remote Access certificate are true? (Choose two.)

Expressway Core can use private CA signed certificate.

You must upload the root certificates in the phone trust store.

Expressway must generate certificate signing request.

Expressway Edge must use public CA signed certificate.

The Jabber client can work with public or private CA signed certificate.

Question 4

Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?

_collab-edge on port 8443

_cisco-uds-edge on port 5061

_collab-edge on port 5061

_cisco-uds on port 8443

Question 5

What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco Collaboration infrastructure?

ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.

ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.

ICE uses FAST updates to optimize the video quality in case of packet los

This technology is available only from Cisco Unified CM version 11.5 and later.

ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.

Question 6

Which configuration is required when implementing Mobile and Remote Access on Cisco Expressway?

IPS

SAML authentication

Cisco Unified CM publisher address

SSO

Question 7

Which step is required when configuring cloud and hybrid deployments for Cisco Jabber?

Add the Jabber user to Cisco Unity Connection.

Add the Jabber user to Expressway-E.

Add the Jabber user to Expressway-C.

Add Jabber Users to the Cisco Webex Administration Tool.

Question 8

Which two statements about Expressway media traversal are true? (Choose two.)

Expressway Control is the traversal server installed in the DMZ.

The Expressway Edge must be put in a firewall DMZ segment.

Cisco Unified Communications Manager zone can be either traversal server or client.

The Unified Communications traversal zone can be used for Mobile and Remote Access.

Both Expressway Edge interfaces can be NATed.

Question 9

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.

Question 10

Refer to the exhibit. Which description of the transformation is true?

It converts 4123@exp-name.exp.domain:<port> to 4123@exp.domain

It changes all patterns that begin with 4123@exp-name.exp.domain:<port> to 1@exp.domain

It changes 413@exp-name.exp.domain:<port> to 413@exp.domain

It converts 4.3@exp-name.exp.domain:<port> to 1@exp.domain

Question 11

Which step is taken when configuring a Cisco Expressway solution?

Configure the Expressway-E by using a non-traversal server zone.

Enable static NAT on the Expressway-E only.

Disable H.323 mode on the Expressway-E.

Enable H.323 H.460.19 demultiplexing mode on the Expressway-C.

Question 12

An organization with a domain name of example.com.
Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)

_sips._tcp.example.com

_sips._udp.example.com

_h323ls._udp.example com

_h323ls._tcp.example.com

_collab-edge._tls.example.com

Question 13

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.

Question 14

An Expressway-E is configured using a single NIC with NAT.
How must the Expressway-C traversal client zone be configured to connect to the Expressway-E?

TLS verify must be enabled.

The zone profile must be set to default.

The peer address must be the Expressway-E NAT address.

The peer address must be the Expressway-E LAN 1 IP address.

Question 15

Which service is available in a cloud-based deployment using Cisco Webex Messenger?

Presence

Phone services

Voicemail

Call forward services

Question 16

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.

Question 17

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

Question 18

Which step is required when configuring Cisco Webex Hybrid Message Service?

Add Expressway-C and Cisco United CM to the Cisco Webex Cloud.

Add Cisco Unity Connection to Expressway-E.

Question 19

Refer to the exhibit. An Expressway-C and Expressway-E are configured for B2B calling and the Expressway-E zone is set to TLS Verify Currently, calls do not reach the Expressway-C. The Traversal Client zone on the Expressway-C for B2B reports the information in the exhibit for the Peer 1 address.
Which action resolves this error?

Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.

Configure the Expressway-C Traversal Client zone transport protocol with TCP.

Add a server certificate to the Expressway-C that is signed by a certificate authority.

Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.

Question 20

Which mode should be used when Call Policy is configured on Expressways?

extended CPL

local CPL, policy service, and off

remote CPL

Question 21

Which statement about scheduling Expressway backups is true?

It is not supported on the application.

It is allowed from the application CLI of the Expressway only.

It is allowed from the application CLI and GUI of the Expressway.

It is allowed from the application GUI of the Expressway only.

Question 22

A company is installing Cisco Collaboration infrastructure and one of the requirements is that they must be able to communicate with many external parties that are using H.323 and SIP. Internally they want to register the endpoints only on SIP. Which functionality would describe the feature that needs to be enabled and where to achieve this?

Interworking in Expressway-C

Transcoding in Cisco Unified Communications Manager

Transcoding in Expressway-C

Interworking in Cisco Unified Communications Manager

Question 23

Refer to the exhibit. What is the result of a transformation applied to alias 88514?

98851@ccnpcollab.com

88513@ccnpcollab com

88514@ccnpcollab.com

88515@ccnpcollab.com

Question 24

With QoS enabled, which two statements about the Cisco Webex Video Mesh Node signaling and media traffic are true? (Choose two.)

From VMN to CUCM SIP endpoints, the source UDP ports from 52500 to 62999 is used for audio traffic.

From VMN to Webex Teams clients, the source UDP port 5004 is used for video traffic.

From Webex cloud to VMN, the source UDP port 9000 is used for audio traffic.

From VMN to video endpoints, the destination UDP port 5004 is used for audio traffic.

From VMN to Webex cloud, the destination UDP port 9000 is used for video traffic.

Question 25

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.

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