Latest Cisco 300-820 CLCEI Exam Questions for Comprehensive Preparation

Question #1

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

A. nified Communications traversal zone

B. eighbor zone

C. NS zone

D. raversal zone

View answer

Correct Answer: BD

Question #2

Where are voice calls handled in a Cisco Jabber hybrid cloud-based deployment with Cisco Webex Platform Service?

A. oice calls use Webex Calling platform for call control and use hybrid media nodes for local conferencing

B. oice calls use local media nodes to keep traffic internal for internal traffic and use Webex Calling for external calls

C. oice call use Cisco Unified Communications Manager for local calls and Webex Calling for external calls

D. oice calls use local Cisco Unified Communications Manager for all calls

View answer

Correct Answer: D

Question #3

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?

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

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

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

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

View answer

Correct Answer: D

Question #4

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

A. resence

B. hone services

C. oicemail

D. all forward services

View answer

Correct Answer: A

Question #5

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

A. Register Expressway-C Connector Hosts to the Cisco Webex Cloud

B. Register Expressway-C to Cisco Unified Communications Manager

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

D. Add Cisco Unity Connection to Expressway-E

View answer

Correct Answer: A

Question #6

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?

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

B. nsure that the _cisco-uds SRV record has been configured

C. nsure that the credential has been entered correctly

D. nsure that the SIP domains are added on Expressway Core

View answer

Correct Answer: C

Question #7

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?

A. nterworking in Expressway-C

B. ranscoding in Cisco Unified Communications Manager

C. ranscoding in Expressway-C

D. nterworking in Cisco Unified Communications Manager

View answer

Correct Answer: B

Question #8

Refer to the exhibit showing logs from the Expressway-C, a copy of the Expressway-E certificate, and the UC traversal zone configuration for the Expressway-C.An office administrator is deploying mobile and remote access and sees an issue with the UC traversal zone. The zone is showing `TLS negotiation failure`. What is causing this issue?

A. The Expressway-E certificate includes the Expressway-C FQDN as a SAN entry

B. The Expressway-C is missing the FQDN of Cisco UCM in the Common Name of its certificate

C. In the UC Traversal Zone on the Expressway-C, the peer address is set to the IP of the Expressway-E, which is not a SAN entry in the Expressway-E certificate

D. The Expressway-E does not have the FQDN of Cisco UCM listed as a SAN in its certificate

View answer

Correct Answer: D

Question #9

Which statement about scheduling Expressway backups is true?

A. t is not supported on the application

B. t is allowed from the application CLI of the Expressway only

C. t is allowed from the application CLI and GUI of the Expressway

D. t is allowed from the application GUI of the Expressway only

View answer

Correct Answer: C

Question #10

Refer to the exhibit. The firewall has been configured from NAT 192.168.108.2 to 100.64.0.1. Which configuration changes are needed for an Expressway-E with dual network interfaces?

A. collab-edge

B. cisco-uds

C. sip

D. cuplogin

View answer

Correct Answer: B

Question #11

Which two licenses are required for the B2B feature to work? (Choose two.)

A. LS verify must be enabled

B. he zone profile must be set to default

C. he peer address must be the Expressway-E NAT address

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

View answer

Correct Answer: CE

Question #12

Which part of a hybrid cloud-based deployment with Cisco Webex Messenger Service is used for meeting capabilities?

A. Cisco Unified CM is always used for meeting capabilities

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

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

D. Cisco Webex Meeting Center is always used for meeting capabilities

View answer

Correct Answer: A

Question #13

Refer to the exhibit. Calls to locally registered endpoints are failing. At present, there are two endpoints registered locally to this Expressway. An H.323 endpoint with an alias of `EndpointA` is registered, and a SIP endpoint with an alias of `EndpointB@pod1.local` is also registered. How is this issue resolved?

A. he dialplan must be redesigned to use the transforms to convert the alias into SIP URI format and then use separate search rules for each format that needs to be dialed within the local zone

B. he calls are failing because there are insufficient licenses

C. he current search rule does not match the call, so the search rule must be modified to include a SIP Variant of ג€Standards-Basedג€

D. alling parties are placing calls with the wrong domain

View answer

Correct Answer: A

Question #14

Which two types of information does Cisco Expressway back up? (Choose two.)

A. all records

B. og files

C. P addresses

D. urrent call states

E. ecurity certificates

View answer

Correct Answer: DE

Question #15

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

A. _collab-edge on port 8443

B. _cisco-uds-edge on port 5061

C. _collab-edge on port 5061

D. _cisco-uds on port 8443

View answer

Correct Answer: A

Question #16

Refer to the exhibit. Logins and failing via mobile and remote access. How is this resolved?

A. obile and remote access login has not been enabled for the domain configured in the Expressway-C

B. IP is disabled on the Expressway-E

C. o Cisco UCM servers are configured in the Expressway- Servers must be added for CallManager and IM and Presence services

D. lthough a traversal client zone exists, there is no Unified Communications traversal client zone

View answer

Correct Answer: C

Question #17

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

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

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

C. The cascading traffic between VMN must bypass the firewall

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

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

View answer

Correct Answer: BD

Question #18

An engineer is deploying an Expressway solution for the SIP domain Cisco.com. Which SRV record should be configured in the public DNS to support inboundB2B calls?

A. \1@conf\\

B. \1@conf\\

C. \1@conf

D. \1@conf\\

View answer

Correct Answer: C

Question #19

An engineer wants to configure a zone on the Expressway-E to receive communications from the Expressway-C in order to allow inbound and outbound calls.How is the peer address configured on the Expressway-C when Expressway-E has only one NIC enabled and is using static NAT mode?

A. xpressway-E DHCP

B. isco UCM FQDN

C. isco UCM DHCP

D. xpressway-E FQDN

View answer

Correct Answer: D

Question #20

Which zone is required between Expressway-E and Expressway-C in Mobile and Remote Access deployments?

A. xpressway-C server certificate

B. isco Unified Communications Manager server certificate

C. xpressway-E server certificate

D. xpressway-C and Expressway-E server certificate

View answer

Correct Answer: A

Question #21

Refer to the exhibit. Logins and failing via mobile and remote access. How is this resolved?

A. Mobile and remote access login has not been enabled for the domain configured in the Expressway-C

B. SIP is disabled on the Expressway-E

C. No Cisco UCM servers are configured in the Expressway-C

D. Although a traversal client zone exists, there is no Unified Communications traversal client zone

View answer

Correct Answer: C

Question #22

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

A. egister Expressway-C Connector Hosts to the Cisco Webex Cloud

B. egister Expressway-C to Cisco Unified Communications Manager

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

D. dd Cisco Unity Connection to Expressway-E

View answer

Correct Answer: A

Question #23

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?

A. link to the DefaultZone

B. pipe to the DefaultZone

C. SIP trunk to the DefaultZone

D. route pattern to the DefaultZone

View answer

Correct Answer: C

Question #24

When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is modified to reflect the NAT address?

A. DP b-line

B. IP record route

C. DP c-line

D. DP m-line

View answer

Correct Answer: C

Question #25

Cisco Collaboration endpoints are exchanging encrypted signaling messages.What is one major complication in implementing NAT ALG for voice and video devices?

A. nternal endpoints cannot use addresses from the private address space

B. he NAT ALG cannot inspect the contents of encrypted signaling messages

C. AT ALG introduces jitter in the voice path

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

View answer

Correct Answer: B

Question #26

What are two reasons why port 8443 is unreachable from the Internet to the Expressway-E? (Choose two.)

A. dvanced Encryption Standard

B. Psec

C. riple Data Encryption Standard

D. orce unencrypted

View answer

Correct Answer: DE

Question #27

Which two considerations must be made when using Expressway media traversal? (Choose two.)

A. ich Media Session licenses are not activated on Expressway-E

B. xpressway-E is listening on the wrong IP interface

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

D. he XCP Service is not activated on Expressway-E

View answer

Correct Answer: BC

Question #28

When configuring a Cisco Expressway solution and need to design the dial plan with various rules for URIs and numbers coming through the device. To do so, it is important that some dial plan rules are applied in a certain order. When configuring the transform section, you must know the range of the priorities.Which range is correct?

A. ny number in the drop-down menu

B. ny number in the dialog box

C. ny number between 1-128

D. ny number between 1-65534

View answer

Correct Answer: D

Question #29

02. In a Mobile and Remote Access deployment, where must communications be encrypted with TLS?

A. iscoExpressway-Eandendpointsoutsidetheenterprise

B. iscoExpressway-C,CiscoUnifiedCommunicationsManager,andIM&P

C. iscoExpressway-C,CiscoExpressway-E,andCiscoUnifiedCommunicationsManage

D. iscoExpressway-C,CiscoExpressway-E,andendpointsoutsidetheenterprise

View answer

Correct Answer: D

Question #30

Which complication does a NAT introduce in SDP for a SIP call?

A. dditional headers due to NAT encapsulation can cause the packet size to exceed the MTU

B. hen the client is behind a NAT they may be unable to determine the appropriate offset due to time zones

C. he IP address specified in the connection data field may be an unrouteable internal address

D. he encryption keys advertised in the SDP are only valid for clients not behind a NAT

View answer

Correct Answer: D

Question #31

Refer to the exhibit. Mobile and remote access is being added to an existing B2B deployment and is failing. When the administrator looks at the alarms on theExpressway-C, the snippets are shown. Which configuration action should the administrator take to fix this issue?

A. The listening port on the Expressway-C for SIP TCP must be changed to a value other than 5060

B. The listening port on the Expressway-C for SIP TLS must be changed to a value other than 5061

C. The listening port on the Cisco UCM for the Expressway-C SIP trunk must be changed to something other than 5060 or 5061

D. The listening port on the Cisco UCM for the Expressway-C SIP trunk is set to something other than 5060 or 5061

View answer

Correct Answer: A

Question #32

Which attribute in the SDP for a call is affected by the static NAT address configuration in an Expressway-E?

A. onnection

B. ame

C. ersion

D. andwidth

View answer

Correct Answer: B

Question #33

When designing the call control on a Cisco Expressway Core, which is the sequence of dial plan functions?

A. ransforms, CPL, user policy, search rules

B. earch rules, zones, local zones

C. NS zone, local zone, search rules

D. earch rules, transforms

View answer

Correct Answer: D

Question #34

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?

A. reate a presearch transform

B. hange the domain of SIP endpoint A to cisco

C. isable SIP in the external zone

D. hange the interworking mode to On

View answer

Correct Answer: D

Question #35

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

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

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

C. CE uses FAST updates to optimize the video quality in case of packet loss

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

View answer

Correct Answer: B

Question #36

In a Mobile and Remote Access deployment, where must communications be encrypted with TLS?

A. Cisco Expressway-E and endpoints outside the enterprise

B. Cisco Expressway-C, Cisco Unified Communications Manager, and IM&P

C. Cisco Expressway-C, Cisco Expressway-E, and Cisco Unified Communications Manager

D. Cisco Expressway-C, Cisco Expressway-E, and endpoints outside the enterprise

View answer

Correct Answer: A

Question #37

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

A. collab-edge on port 8443

B. cisco-uds-edge on port 5061

C. collab-edge on port 5061

D. cisco-uds on port 8443

View answer

Correct Answer: A

Question #38

Refer to the exhibit showing logs from the Expressway-C, a copy of the Expressway-E certificate, and the UC traversal zone configuration for the Expressway-C.An office administrator is deploying mobile and remote access and sees an issue with the UC traversal zone. The zone is showing `TLS negotiation failure`. What is causing this issue?

A. he Expressway-E certificate includes the Expressway-C FQDN as a SAN entry

B. he Expressway-C is missing the FQDN of Cisco UCM in the Common Name of its certificate

C. n the UC Traversal Zone on the Expressway-C, the peer address is set to the IP of the Expressway-E, which is not a SAN entry in the Expressway-E certificate

D. he Expressway-E does not have the FQDN of Cisco UCM listed as a SAN in its certificate

View answer

Correct Answer: D

Question #39

Refer to the exhibit. Mobile and remote access is being added to an existing B2B deployment and is failing. When the administrator looks at the alarms on theExpressway-C, the snippets are shown. Which configuration action should the administrator take to fix this issue?

A. he listening port on the Expressway-C for SIP TCP must be changed to a value other than 5060

B. he listening port on the Expressway-C for SIP TLS must be changed to a value other than 5061

C. he listening port on the Cisco UCM for the Expressway-C SIP trunk must be changed to something other than 5060 or 5061

D. he listening port on the Cisco UCM for the Expressway-C SIP trunk is set to something other than 5060 or 5061

View answer

Correct Answer: A

Question #40

What allows endpoints behind a NAT to discover the paths through which they will pass media?

A. TP

B. LS

C. NMP

D. CE

View answer

Correct Answer: D

Question #41

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?

A. he search rule must be changed to continue on match

B. he existing zone using ID 7 must be deleted

C. ore bandwidth must be added to the appropriate pipes

D. he underlying DNS issue must be resolved

View answer

Correct Answer: A

Question #42

An organization wants to enable a Cisco Webex connector to synchronize all employees automatically with Cisco Webex instead of using a manual list.Where is the Webex Hybrid Directory Service configured?

A. nstall Cisco Directory Connector on a Microsoft Windows Domain server and configure the software and Webex Control Hub

B. nable the directory service in Cisco Unified Communications Manager under Cisco Unified Serviceability and add the service in Webex Control Hub

C. nable the directory service on Cisco Expressway Edge for Office 365 or Cisco Expressway Core for internal Active Directory and add the service in Webex Control Hub

D. nstall the Cisco Express Connector and configure the device in Cisco Unified Communications Manager under Cisco Unified Serviceability and add the service in Webex Control Hub

View answer

Correct Answer: A

Question #43

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

A. romVMNtoCUCMSIPendpoints,thesourceUDPportsfrom52500to62999isusedforaudiotraffic

B. romVMNtoWebexTeamsclients,thesourceUDPport5004isusedforvideotraffic

C. romWebexcloudtoVMN,thesourceUDPport9000isusedforaudiotraffic

D. romVMNtovideoendpoints,thedestinationUDPport5004isusedforaudiotraffic

View answer

Correct Answer: AB

Question #44

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

A. t converts 4123@exp-name

B. t changes all patterns that begin with 4123@exp-name

C. t changes 413@exp-name

D. t converts 4

View answer

Correct Answer: A

Question #45

Which entry in the public (external) DNS is valid to configure DNS SRV records for a Cisco Mobile and Remote Access solution?

A. cisco-uds

B. cisco-mra

C. collab-edge

D. cisco-expwy

View answer

Correct Answer: A

Question #46

Refer to the exhibit. When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?

A. 3358 is replaced by 135, and then is sent to the local zone

B. 3358 is replaced by 135 and remains in the same zone

C. 3358 is replaced by 135, and then is sent to the traversal zone

D. 3358 is sent directly to the traversal zone

View answer

Correct Answer: C

Question #47

Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?

A. ff

B. est Effort

C. uto

D. orce Encrypted

View answer

Correct Answer: A

Question #48

04. 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?

A. LSverifymustbeenabled

B. hezoneprofilemustbesettodefault

C. hepeeraddressmustbetheExpressway-ENATaddress

D. hepeeraddressmustbetheExpressway-ELAN1IPaddress

View answer

Correct Answer: C

Question #49

05. Cisco Collaboration endpoints are exchanging encrypted signaling messages. What is one major complication in implementing NAT ALG for voice and video devices?

A. nternalendpointscannotuseaddressesfromtheprivateaddressspace

B. heNATALGcannotinspectthecontentsofencryptedsignalingmessages

C. ATALGintroducesjitterinthevoicepath

D. ourceaddressescannotprovidethedestinationaddressesthatremoteendpointsshoulduseforreturnpackets

View answer

Correct Answer: B

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