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300-820 Sample Questions Answers

Questions 4

When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access, which TLS verify subject name must be configured on the Expressway-E UC traversal zone?

Options:

A.

Webex CUSP Cluster Name

B.

Expressway-E Cluster Name

C.

Cisco Unified Communications Manager Publisher FQDN

D.

Expressway-C Cluster Name

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Questions 5

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

Options:

A.

Presence

B.

Phone services

C.

Voicemail

D.

Call forward services

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Questions 6

What is the last step for domain management in Cisco Webex Control Hub if an engineer adds users already signed in with the company domain?

Options:

A.

Publish a domain.

B.

Add a domain.

C.

Verify a domain.

D.

Claim a domain.

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Questions 7

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?

Options:

A.

Create a presearch transform.

B.

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

C.

Disable SIP in the external zone.

D.

Change the interworking mode to On.

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Questions 8

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?

Options:

A.

Interworking in Expressway-C

B.

Transcoding in Cisco Unified Communications Manager

C.

Transcoding in Expressway-C

D.

Interworking in Cisco Unified Communications Manager

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Questions 9

Refer to the exhibit.

When a Jabber user attempts to connect from outside of the organization, the user enters the login information as "user@example.com" 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?

Options:

A.

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

B.

Change the collab-edge record to point to 5061.

C.

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

D.

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

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Questions 10

An engineer is configuring Cisco Expressway-E and needs to implement toll fraud prevention. Which configuration meets this requirement?

Options:

A.

Enable SIP ALG inspection on the network address translation firewall.

B.

Enable and configure local call policy.

C.

Enable and configure the Expressway-E firewall.

D.

Configure the external firewall to block specific IPs.

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Questions 11

A company has a single Expressway-E that exhibits high resource utilization. An engineer checks the logs and finds numerous fraudulent attempts from sip:200@cisco.com. Where must the engineer go to configure a call policy rule and block the desired URI?

Options:

A.

Call History Configuration > Call Policy > Rules

B.

Configuration > Call History > Policy > Rules

C.

Configuration > Call Policy > Rules

D.

Configuration > Policy > Inbound > Rules

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Questions 12

In a Webex Video Mesh deployment, where do Cloud-registered Webex Teams clients and devices send signaling traffic for call setup?

Options:

A.

to a local Video Mesh node

B.

directly to the Webex cloud

C.

to an Expressway-E server

D.

to a remote Video Mesh node

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Questions 13

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

Options:

A.

The MRA license is missing on the Expressway-E.

B.

The Unified Communications zone is down.

C.

Transform is not configured on Expressway-E.

D.

The SRV record for _cisco-uds is misconfigured.

E.

The firewall is blocking the port.

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Questions 14

Which statement correctly describes links and pipes in Cisco Expressway?

Options:

A.

A maximum of one pipe can be applied to a link.

B.

A call between two endpoints in the same subzone or zone fails if there is no pipe between the endpoints.

C.

A call between two endpoints in the same subzone or zone fails if there is no link between the endpoints.

D.

The lower bandwidth restriction is applied to calls over a link that is associated to two pipes.

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Questions 15

An engineer must enable the communication between two separate Expressway-C servers to allow inbound and outbound calling between different endpoints registered on each server. Which configuration must happen?

Options:

A.

Configure a traversal zone on each server with a destination of the other Expressway-C.

B.

Configure a neighbor zone on each server with a destination of the other Expressway-C.

C.

Configure a transform on each server to strip the port numbers at the end of the alias.

D.

Configure a transform on each server to convert the calling alias into the called alias.

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Questions 16

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

Options:

A.

Off

B.

Auto

C.

Force Encrypted

D.

Best Effort

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Questions 17

Refer to the exhibit. A manager asks an engineer to create a CSV file for the HTTP allow list on the Expressway deployment. The engineer wrote the script shown and uploaded it to the Expressway, but it is not being accepted. Which action resolves the issue?

Options:

A.

Add the command POST at the end on this line “http://myServer4/myPath4,block,,,POST”.

B.

Remove the Method “PUT” from “http://myServer2:8000/myPath2,allow “my deployment”, “an allow test”, PUT”.

D.

Nothing is wrong, but the file type is most likely not XML.

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Questions 18

Refer to the exhibit. Call policy rules on an Expressway-E prevent external callers from the internet from calling a VIP whose URI is vip@cisco.com. Which additional configuration setting is required for this call policy to function as intended?

Options:

A.

The default zone on the Expressway-E must not be configured to treat as authenticated.

B.

A search rule must be configured with an extract match forvip^cisco.com to pass the call to the Expressway-C.

C.

The Cisco TelePresence endpoint registered with the URI vip@cisco.com must be set in *do not disturb" mode.

D.

SIP TLS must be disabled on the Expressway-E.

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Questions 19

Cisco Collaboration endpoints are exchanging encrypted signaling messages.

What is one major complication in implementing NAT ALG for voice and video devices?

Options:

A.

Internal endpoints cannot use addresses from the private address space.

B.

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

C.

NAT ALG introduces jitter in the voice path.

D.

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

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Questions 20

Refer to the exhibit.

If the Webex Teams device cannot connect to Video Mesh Cluster-1 because it is busy, which media node does the Webex Teams device connect to next?

Options:

A.

Both Cloud Node US-EAST and US-WEST

B.

Video Mesh Cluster-2

C.

Cloud Node US-EAST

D.

Cloud Node US-WEST

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Questions 21

Which protocol and port are used for signaling between on-premises Cisco Webex Video Mesh Nodes and Cloud Media Services?

Options:

A.

standard SIP over TCP port 5060

B.

signaling over HTTPS TCP port 443

C.

standard SIPTLS over TCP port 5061

D.

signaling over TCP port 444

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Questions 22

Which user management method uses the Webex Directory Connector to add and synchronize users to the Control Hub organization?

Options:

A.

Synchronize from Active Directory.

B.

Synchronize from Azure AD.

C.

Synchronize from "Add using People API'.

D.

Synchronize from Okta.

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Questions 23

Refer to the exhibit.

Which description of the transformation is true?

Options:

A.

It converts 4123@exp-name.exp.domain: to 4123@exp.domain

B.

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

C.

It changes 413@exp-name.exp.domain: to 413@exp.domain

D.

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

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Questions 24

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

Options:

A.

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

B.

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

C.

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

D.

Voice calls use local Cisco Unified Communications Manager for all calls.

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Questions 25

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

Options:

A.

Unified Communications traversal zone

B.

neighbor zone

C.

DNS zone

D.

traversal zone

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Questions 26

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?

Options:

A.

The 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.

The calls are failing because there are insufficient licenses. Additional licenses must be installed for the Expressway to route these calls.

C.

The current search rule does not match the call, so the search rule must be modified to include a SIP Variant of “Standards-Based”.

D.

Calling parties are placing calls with the wrong domain. End-users must be instructed not to use the

pod1.local domain as that is owned by the local system. Calls to any other domain would work.

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Questions 27

An administrator is enabling Mobile and Remote Access login for the Cisco UCM registration domain cisco.com. Phones are registered with a Cisco UCM phone security profile name of securephone.cisco.com. Which two subject alternative names must be configured? (Choose two.)

Options:

A.

Securephone.cisco.com on the CallManager certificate

B.

cisco.com on the Expressway-C certificate

C.

Securephone.cisco.com on the Expressway-E certificate

D.

cisco.com on the Expressway-E certificate

E.

Securephone.cisco.com on the Expressway-C certificate

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Questions 28

Refer to the exhibit.

An ISDN gateway is registered to Expressway-C with a prefix of 9 and/or it has a neighbor zone specified that routes calls starting with a 9.

Which value should be entered into the "Source" field to prevent toll fraud regardless at origin of the call?

Options:

A.

Traversal Zone

B.

Any

C.

Neighbor Zone

D.

All

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Questions 29

What is the default file extension for saving Cisco Expressway-C backups when using the Google Chrome browser?

Options:

A.

.tar.gz.enc

B.

.tar.tar.gz

C.

.zip

D.

.tar.gz.gz

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Questions 30

An employee has recently left an organization and a manager suspects that this employee may have made changes to the system that no one is aware of. Mobile and Remote Access registration is not working. Internal communications appear to be working, but no external system is able to register or call anywhere. While investigating this problem, it is discovered that no internal systems are able to call externally either. What is the TraversalZone missing that is causing this issue?

Options:

A.

SIP trunk to the DefaultZone

B.

route pattern to the DefaultZone

C.

link to the DefaultZone

D.

pipe to the DefaultZone

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Questions 31

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?

Options:

A.

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

B.

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

C.

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

D.

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

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Questions 32

Which connection does the traversal zone configuration define?

Options:

A.

Expressway-E and Collaboration Endpoints

B.

Cisco UC and Cisco Unified Presence Server

C.

Cisco Expressway-C and Cisco Expressway-E platforms

D.

Cisco UCS E-Series and Cisco UCM

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Questions 33

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?

Options:

A.

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

B.

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

C.

Enable 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.

Install 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.

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Questions 34

An administrator is deploying Cisco Expressways for Mobile and Remote Access. The registration domain is “example.com”, and the Expressway-E FQDN is “expe.example.com”. Cisco Jabber clients on the internet cannot discover services via DNS lookup. Which SRV records must be configured in the public DNS to allow Service Discovery?

Options:

A.

_collab-edge._tls.example.com

B.

_cisco-uds._tcp.expe.example.com

C.

_cisco-uds._tcp.example.com

D.

_collab-edge._tls.expe.example.com

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Questions 35

A call is sent by Cisco UCM to Expressway with a URI of 75080001@expc1a.pod8.test.lab. If (7508…)

@expc1a\.pod8\.test\.lab.* is the pattern string, what would be the replacement string of the transform in Expressway to re-write the call so that it becomes 75080001@conf.pod8.test.lab?

Options:

A.

\1@conf\.pod8.test.lab.@

B.

\1@conf\.pod8\.test\lab.*

C.

\1@conf.pod8\.test\.lab

D.

\1@conf\.pod8\.test.lab.!

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Questions 36

An Expressway Server has both network protocols (IPv4 and IPv6) enabled. Which two behaviors are correct? (Choose two.)

Options:

A.

If the calling endpoint is on an IPv4-Only network and the called endpoint is on an IPV6-Only network, a NAT64 device must convert the IPv4 addresses to IPv6 addresses.

B.

Endpoints register with either IPv4 or IPv6 addresses, but dual-stack endpoints choose IPv6 protocol by default.

C.

If the calling endpoint is on an IPv4-Only network and the called endpoint is on an IPv6-Only network, the Expressway Server act as a gateway and convert the two protocol versions.

D.

Endpoints register only with IPv6 addresses on an Expressway Server with IPv6 protocol enabled regardless of the state of IPv4 protocol.

E.

Endpoints register with either IPv4 or IPv6 addresses, and endpoints decide which protocol to use by the format of the configured Expressway Server IP address.

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Questions 37

An engineer attempts to upload a server certificate to an Expressway-C server but receives an error when they click the upload button that says that the file is invalid. The engineer is advised that this happens because the certificate was signed incorrectly and is missing an attribute. What must the engineer do to upload the certificate?

Options:

A.

Create a certificate request via Certificate Services Web Page and ensure that the certificate validity period is five years because the Expressway server validates this during certificate import.

B.

Create a certificate request via the Certificate Services Web Page and ensure that the Subject Common Name field contains the server FQDN and all Cisco Unified CM phone security profile names.

C.

Create a new certificate template with "Server authentication” and "Client authentication" enabled and use this template when signing the Expressway server certificate.

D.

Create a new certificate template with the certificate attribute "Allow private key to be exported" enabled and use this template when signing the Expressway server certificate.

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Questions 38

An organization with a domain name of example.com.

Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)

Options:

A.

_sips._tcp.example.com

B.

_sips._udp.example.com

C.

_h323ls._udp.example com

D.

_h323ls._tcp.example.com

E.

_collab-edge._tls.example.com

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Questions 39

An engineer must review a new traversal zone that is not establishing a successful connection between Expressway-C and Expressway-E. When the event log page on the Expressway-E is reviewed, an authentication failure is found with the detail “user not found”. Which two actions must the engineer take to resolve the issue? (Choose two.)

Options:

A.

Disable TLS verification on the Expressway-E.

B.

Ensure that the authentication credentials configured on both zones to match.

C.

Ensure that LDAP is properly configured and synchronized on the Expressway-E.

D.

Ensure that the authentication credentials exist on the Expressway-E local database.

E.

Ensure that the authentication credentials exist on the Expressway-C local database.

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Questions 40

An engineer must configure the zone to connect to an Expressway-E using Single NIC with NAT. The internal IP address is 192.168.10.63, and the NAT address is 203.0.113.5. What must the engineer configure on the Expressway-C to meet this requirement?

Options:

A.

traversal zone with the peer address 192.168.10.63

B.

neighbor zone with the peer address 192.168.10.63

C.

traversal zone with the peer address of 203.0.113.5

D.

neighbor zone with the peer address of 203.0.113.5

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Questions 41

An administrator has been asked to configure Video Mesh signaling traffic to route through a proxy.

Which is an available proxy type in the Video Mesh node configuration to support this deployment model?

Options:

A.

Transparent Explicit Proxy

B.

Transparent Inspecting Proxy

C.

Reverse Proxy

D.

Distorting Proxy

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Questions 42

Refer to the exhibit. After hardening the Cisco Expressway, an engineer noticed this error in the logs HTTP error 429 "Too Many Requests,” and users report that authentication is not possible on more than two devices. What must the engineer increase to correct the issue?

Options:

A.

maximum authorizations per period

B.

credentials refresh interval

C.

rate control period

D.

credentials cleanup interval

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Questions 43

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 inbound B2B calls?

Options:

A.

_collab-edge._tls.cisco.com

B.

_cisco-uds._tcp.cisco.com

C.

_sip._tcp.cisco.com

D.

_cuplogin._tcp.cisco.com

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Questions 44

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?

Options:

A.

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

B.

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

C.

Ensure that the credential has been entered correctly.

D.

Ensure that the SIP domains are added on Expressway Core.

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Questions 45

Users in the Cisco Webex collaboration environment want to be able to use @webex when scheduling a Webex meeting from their Outlook client connected to Office365. Which configuration meets this requirement?

Options:

A.

Add an O365 tenant in the admin pages of Webex as a Microsoft 385 Global administrator.

B.

Add the Webex domain in the calendar integration services in the admin interface for Microsoft Exchange Online.

C.

Enable user onboarding for each user in the Webex admin interface. Each user will then authorize Webex to read only their calendar in a secure manner.

D.

Add an O365 tenant in the admin pages of Webex as a Webex site administrator.

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Questions 46

Refer to the exhibit.

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

Options:

A.

13358 is replaced by 135, and then is sent to the local zone.

B.

13358 is replaced by 135 and remains in the same zone.

C.

13358 is replaced by 135, and then is sent to the traversal zone.

D.

13358 is sent directly to the traversal zone.

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Questions 47

Refer to the exhibit. An engineer must configure a B2B traversal zone. Trusted certification authority and server certificates are uploaded to Cisco Expressway-C and Expressway-E servers. After the traversal zone configuration is completed in Expressway-C, the error message in the exhibit appears. What are the two reasons for the error? (Choose two.)

Options:

A.

The peer 1 address in Expressway-C must be replaced by the FQDN of Expressway-C.

B.

The peer 1 address in Expressway-C is not the FADN of Expressway-E.

C.

The communication port is not set to 7001.

D.

The FQDN of Expressway-E cannot be resolved by the DNS server.

E.

The traversal zone TLS verify subject name in Expressway-E does not match the FQDN of Expressway-C.

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Questions 48

What is the benefit of configuring ICE, TURN and STUN in a Cisco Unified Collaboration environment?

Options:

A.

The ICE protocol enables the use of MRA for Cisco endpoints to register behind the firewall.

B.

The endpoints use fewer ports to minimize the port range and allows for multiple connections in a high-density deployment.

C.

It can traverse firewalls without opening incoming ports.

D.

The endpoints discover paths to optimize media flow and allows for peer-to-peer media traffic in some cases.

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Questions 49

Refer to the exhibit. A Cisco UCM cluster in mixed mode is integrated with Cisco Expressway-C for Mobile and Remote Access endpoint registration. TLS verify mode is enabled and self-signed certificates with the same common name for Cisco Tomcat and Cisco Call Manager are uploaded to Expressway-C. A Cisco Jabber client fails to register using secure SIP. Which two configurations are the cause of the issue? (Choose two.)

Options:

A.

The Tomcat certificate has the incorrect FQDN for the Cisco UCM server.

B.

The Jabber client cannot connect to its associated phone device by using Cisco Computer Telephony Integration.

C.

The incorrect secure device profile was applied to the Jabber client.

D.

The Expressway-C does not allow two self-signed certificates with the same CN to be trusted.

E.

The Call Manager certificate is causing a conflict.

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Questions 50

An engineer is deploying Mobile and Remote Access to allow external Cisco Jabber users to sign into a Cisco UCM cluster via Cisco Expressways. The users will sign-in in the format username@cisco.com. Contact photos for Jabber are hosted on a webserver with the FQDN of phonebook cisco.com. Which configuration must be completed to allow external Jabber users to see contact photos?

Options:

A.

An HTTP allow list entry must be made on the Expressway-E for phonebook cisco.com.

B.

A SIP allow list entry must be made on the Expressway-E for .*@cisco.com.

C.

An HTTP allow list entry must be made on the Expressway-C for phonebook cisco.com.

D.

A SIP allow list entry must be made on the Expressway-C for .*@cisco.com.

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Questions 51

Refer to the exhibit. An administrator set up a B2B interop with a business partner running a Microsoft Lync environment and can successfully make outbound video calls to Jane.doe@ciscovideo.com. Inbound calls to paul.smith@ciscovoice.com, however, are failing. A quick SRV search returns the records in the exhibit. Which record must be modified to resolve this challenge?

Options:

A.

_h323ls._udp.ciscovoice.com

B.

_sipfederationtcp._tcp.ciscovoice.com

C.

_sips._tcp.ciscovoice.com

D.

_collab-edge._tls.ciscovoice.com

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Questions 52

Refer to the exhibit. A Cisco Webex device on an enterprise network has identified the given STUN round-trip delays in milliseconds to the enterprise Video Mesh clusters and two Webex Cloud Media clusters during the call setup. Which correct sequence of clusters is the client connecting to?

Options:

A.

US West Coast WCMC. If US West Cost WCMC is full, then Europe WCMC because clients select clusters in the order of SRT delays.

B.

DC Europe. If DC Europe is full, DC APAC because clients select on-premises clusters in the order of SRT delays before using cloud resources.

C.

DC Europe. If DC Europe is full, US West Coast WCMC because clients select resources in the order of SRT delays but ignore SRTs greater than 250 ms.

D.

US West Coast WCMC. Clients continuously monitor DC US cluster and reconnect when DC US are available to save bandwidth.

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Questions 53

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?

Options:

A.

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

B.

The call is queued.

C.

The call fails.

D.

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

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Questions 54

Which type of interface is required when the Cisco Expressway-E is located in a DMZ between two separate firewalls on separate network segments?

Options:

A.

dual network interface

B.

application programming interface

C.

command line interface

D.

single network interface

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Questions 55

An engineer must fix broken SSH tunnels between Expressway-C (192.168.10.5) and Expressway-E (192.168.20.5). The engineer is advised that the packet capture shows the required packets for the SSH tunnels leaving the Expressway-C but not reaching the Expressway-E. Which firewall configuration must the engineer allow to resolve this issue?

Options:

A.

port 2222 from Expressway-E to Expressway-C

B.

port 7001 from Expressway-C to Expressway-E

C.

port 7001 from Expressway-E to Expressway-C

D.

port 2222 from Expressway-C to Expressway-E

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Questions 56

What is a requirement when configuring the Cisco Webex Hybrid Message account for accessing the API of the Cisco UCM IM and Presence Service?

Options:

A.

Add a new end-user with the “Standard AXL API Access” role

B.

Use an application user with only the “Standard CTI Allow Control of All Devices” role

C.

Use an application user not the main administrator account with the “Standard AXL API Access” role

D.

Use the main administrator account if it includes the “Standard AXL API Access” role

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Questions 57

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?

Options:

A.

TLS verify must be enabled.

B.

The zone profile must be set to default.

C.

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

D.

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

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Questions 58

A Cisco Webex Hybrid Video Mesh Node can be installed in the DMZ and on the internal network.

Which statement is true?

Options:

A.

Webex Cloud supports either a DMZ-based Mesh Node for security or an internal-based Mesh Node for media control only.

B.

Installing a Video Mesh Node in the DMZ requires you to open TCP and UDP port 4444 in your internal firewall for full clustering functionality.

C.

Installing a Video Mesh Node in the DMZ requires the external firewall to allow UDP traffic from ANY port to the address of the Video Mesh Nodes via port 5004.

D.

Using internal Video Mesh Node also works due to Mobile and Remote Access setup for Webex Teams clients. A DMZ node is added for extra security.

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Questions 59

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 the Expressway-C, the snippets are shown. Which configuration action should the administrator take to fix this issue?

Options:

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. It must be set to 5060 for insecure and 5061 for secure SIP

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Questions 60

Which zone is required on a B2B deployment between Expressway-C and Expressway-E?

Options:

A.

traversal zone

B.

DNS zone

C.

default zone

D.

neighbor zone

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Questions 61

A company has an on-premises Cisco collaboration cluster that contains Cisco UCM, IM and Presence, and Cisco Webex in the cloud. The company wants to integrate the on-premises infrastructure with Webex to enable interoperability with the Webex App. An engineer already configured the cluster in Cisco UCM, IM and Presence, and the organization in the Webex Control Hub. Which action must the engineer take to complete the configuration?

Options:

A.

Deploy Directory Connector.

B.

Open the TCP 443 port from IM and Presence to Webex Cloud.

C.

Deploy a Webex Device Connector.

D.

Deploy a Cisco Expressway Message Connector host.

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Questions 62

Cisco Expressways are being deployed for Mobile and Remote Access. The Expressway-E internal interface (LAN1) IP is 192.168.100.10/24, and the external interface (LAN2) IP is 172.16.100.10/24.

The Expressway-C IP is 192.168.20.10/24. The default gateway for each subnet is the first useable address. How must the Expressway-E be configured to allow proper routing to the internal and external networks?

Options:

A.

IPv4 gateway: 172.16.100.1, and a static route for the 192.168.100.0/24 subnet using LAN1

B.

IPv4 gateway: 192.168.100.1, and a static route for the 192.168.20.0/24 subnet using LAN1

C.

IPv4 gateway: 192.168.100.1, and a static route for the 172.16.100.0/24 subnet using LAN2

D.

IPv4 gateway: 172.16.100.1, and a static route for the 192.168.20.0/24 subnet using LAN1

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Exam Code: 300-820
Exam Name: Implementing Cisco Collaboration Cloud and Edge Solutions (300-820 CLCEI)
Last Update: Oct 15, 2025
Questions: 207
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