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Best Study Guides for 300-820 Exam

• Brett Hall and Nik Smith’s Practical Cisco Unified Communications Security (Amazon)

  Authored by industry experts, the book is a pivotal tool in mastering the core areas of Cisco UC system security. This material further addresses the fundamental attributes of how to effectively protect environments that aid in supporting various types like meetings, messaging, video, and voice. Likewise, it zooms in different real-time collaboration functions that are grounded on either mobile with remote access or mobile devices on BYOD initiatives.

  For a quick reference of the content, this begins with the impact of guarding your workforce through safety techniques and basic physical security features. Once you understand its importance, it’s easy to take necessary countermeasures to keep Cisco Unified CM, Cisco Meeting Server, and Cisco Unity Connection secured and functional. Other essential subjects that are accounted for are Session Border Controllers, as well as UC services, resources, and applications.

• David J. Bateman’s Configuring Cisco Unified Communications Manager and Unity Connection: A Step-by-Step Guide (Amazon)

  The book is created to provide you with an in-depth analysis of two remarkable Cisco systems: Unified Communications Manager and Unity Connection. With a detailed summary of the processes on how to design, configure, and manage both Cisco voice messaging and call processing, you get to maximize your skills and become well-rounded with the demands of the industry. In addition, there are lessons covering the procedures that administrators, integrators, and other professionals working with collaboration solutions should be aware of.

• David Schulz’s Cisco Unity Connection, 1st Edition (Amazon)

  Though this book was already released years ago, most of its contents are still relevant to today’s Cisco Unity Connection solution. Make use of its thorough collection of concepts and techniques to efficiently master the crucial tasks involved in handling Cisco Unity Connection operations. These include planning, implementing, and maintaining voice messaging systems. Furthermore, the author delivers a more realistic approach in understanding the system lifecycle and that is by giving an extensive explanation, together with some practical examples, case studies, and industry set solutions.

• Official exam guide

  Before you begin with the detailed training, you have to check the complete list of topics. All the relevant areas are recorded on the official site and can be downloaded at your own convenience. This PDF file breaks down the four major domains of the Cisco 300-820 exam. Each of these holds 25% of the total syllabus. This means every section is equally substantial, hence the need to be competent in all divisions.

Cisco 300-820 test is a proctored exam consisting of 60 to 70 questions, and the format may include multiple-choice, drag-and-drop, and simulation types. To sit for this certification exam, candidates must have experience deploying and configuring cloud and edge solutions. The Cisco 300-820 exam also covers Cisco Webex, Cisco Umbrella, Cisco Expressway, and Cisco Meeting Server deployment, among other technologies.

 

NEW QUESTION # 86
What are the steps to access the Service Setup Wizard during the first setup of the Expressway server to license the server?

• A. Factory reset the Expressway server to pass from Expressway-C to Expressway-E.
• B. From the GUI of the Expressway server, go to Maintenance> Option keys> First Setup Wizard.
• C. From the GUI of the Expressway server, go to Status> Overview> Run service setup.
• D. Factory reset the Expressway server to pass from Smart Licensing to PAK-based licensing.

Answer: C

Explanation:
The first time you log in to the Expressway web user interface you'll automatically see the Service Setup Wizard. (For subsequent log ins you'll see the Status > Overview page, and from that page you can click Run service setup at anytime.)
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X14-
0/basic_config/exwy_b_cisco-expressway-e-and-expressway-c-basic-configuration-deployment- guide-x14-0/exwy_m_run-the-service-setup- wizard.html#concept_8D0B90ED41749AA37FFFA48B2EA8343B

NEW QUESTION # 87
Refer to the exhibit. A collaboration engineer creates an allow list test file for a Mobile and Remote Access deployment. Which lines are needed to format the test in the file correctly?

• A. a block test,https:8443,GET "myServer/myPath",my deployment:block
• B. "my deployment", block, GET https://myServer:8443/myPath, "a block test"
• C. https://myServer:8443/myPath.block, "my deployment", "a block test", GET
• D. a block test:https:8443:GET "myServer/myPath":my deployment:block

Answer: C

NEW QUESTION # 88
Refer to the exhibit.

Refer to the exhibit. The web server is set up to store contact photos and the Cisco Jabber-config.xml file is updated for all clients. After these changes, Jabber for Windows users cannot view the contact photos when they are connected via Mobile and Remote Access. Which action resolves the issue?

• A. Update the "PhotoUriWithToken' entry to "Https".
• B. Update the contact photos to "png".
• C. Add the web-server address within the HTTP server allow list on the Expressway-C.
• D. Add the web-server address within the HTTP server allow list on the Expressway-E.

Answer: D

NEW QUESTION # 89
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. The peer address must be the Expressway-E NAT address.
• B. TLS verify must be enabled.
• C. The peer address must be the Expressway-E LAN 1 IP address.
• D. The zone profile must be set to default.

Answer: A

NEW QUESTION # 90
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?

• A. Encrypted IP traffic for collaboration devices always is trusted by the firewall.
• B. The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.
• C. The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.
• D. The signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.

Answer: D

NEW QUESTION # 91
Which two items are configured when deploying a B2B collaboration solution? (Choose two.)

• A. SIP trunk between Cisco Unified Communications Manager and Cisco Expressway-E
• B. traversal client on a Cisco Expressway-E
• C. DNS zone on a Cisco Expressway-C
• D. SIP trunk between Cisco Unified Communications Manager and Cisco Expressway-C
• E. search rules in Cisco Expressway-E

Answer: D,E

NEW QUESTION # 92
Which step is taken when configuring a Cisco Expressway solution?

• A. Enable static NAT on the Expressway-E only.
• B. Disable H.323 mode on the Expressway-E.
• C. Configure the Expressway-E by using a non-traversal server zone.
• D. Enable H.323 H.460.19 demultiplexing mode on the Expressway-C.

Answer: A

NEW QUESTION # 93
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. Cisco UCM FQDN
• B. Cisco UCM DHCP
• C. Expressway-E DHCP
• D. Expressway-E FQDN

Answer: D

Explanation:
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-
11/Cisco-Expressway-Basic-Configuration-Deployment-Guide-X8-11-4.pdf

NEW QUESTION # 94
A video device registered with Cisco UCM failed to make an outbound B2B call. From Expressway-C diagnostic logs, an engineer found that the destination pattern is "[email protected]:5061", and the call was dropped with a 404 response code from Expressway-C. The search rule intended for this call-in Expressway-C is configured for Alias Pattern Match, Pattern type "Suffix," and Pattern "example.com". How must the configuration be changed to allow the call?

• A. Create a transform on Expressway-C to strip port numbers.
• B. Update the route pattern in Cisco UCM to send calls to "example.com" to the correct port.
• C. Update the call policy list in Expressway-C to allow calls to "example.com".
• D. Create a call policy rule on Expressway-E to allow calls to port 5061.

Answer: A

NEW QUESTION # 95
When the network requirements are configured for a new Video Mesh deployment, which firewall ports are required so that Video Mesh cascade signaling succeeds?

• A. TCP 443 and 8443
• B. TCP 443 and 444
• C. UDP 5004 and 5005
• D. UDP 33432 through 33433

Answer: B

NEW QUESTION # 96
Which two statements about Mobile and Remote Access certificate are true? (Choose two.)

• A. Expressway must generate certificate signing request.
• B. Expressway Core can use private CA signed certificate.
• C. You must upload the root certificates in the phone trust store.
• D. Expressway Edge must use public CA signed certificate.
• E. The Jabber client can work with public or private CA signed certificate.

Answer: A,B

NEW QUESTION # 97
Refer to the exhibit. Which inbound connection should an administrator configure on the outside firewall?

• A. SIP: TCP 5061
• B. XMPP: TCP 5222
• C. HTTPS (tunneled over SSH between C and E): TCP 2222
• D. Media: UDP 36000 to 36011

Answer: B

Explanation:
SIP UDP: 5060
SIP TCP: 5060
SIP TLS: 5061
XMPP TCP: 5222
RTP/RTCP: 36000-59999
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-
5/Cisco-Expressway-IP-Port-Usage-for-Firewall-Traversal-Deployment-Guide-X12-5.pdf

NEW QUESTION # 98
When designing the call control on a Cisco Expressway Core, which is the sequence of dial plan functions?

• A. transforms, CPL, user policy, search rules
• B. DNS zone, local zone, search rules
• C. search rules, transforms
• D. search rules, zones, local zones

Answer: C

NEW QUESTION # 99
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?

• A. Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.
• B. The call fails.
• C. The call is queued.
• D. Another node in the cluster is used and an intra-cluster cascade between the two Video Mesh nodes is formed.

Answer: D

NEW QUESTION # 100
Refer to the exhibit. Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)

• A. HTTPS: TCP 8443
• B. XMPP: TCP 7400
• C. Media: UDP 36012 to 59999
• D. SIP: TCP 7001
• E. SIP TCP 5061

Answer: B,D

Explanation:
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-
5/Cisco-Expressway-IP-Port-Usage-for-The internal firewall must allow the following outbound connections from the Expressway-C to the Expressway-E:
SIP: TCP 7001
Traversal media: UDP 2776 to 2777 (or 36000 to 36011 for large
VM/appliance)
XMPP: TCP 7400
HTTPS (tunneled over SSH between C and E): TCP 2222

NEW QUESTION # 101
Refer to the exhibit. The web server is set up to store contact photos and the Cisco Jabber- config.xml file is updated for all clients. After these changes, Jabber for Windows users cannot view the contact photos when they are connected via Mobile and Remote Access. Which action resolves the issue?

• A. Update the "PhotoUriWithToken' entry to "Https".
• B. Add the web-server address within the HTTP server allow list on the Expressway-E.
• C. Update the contact photos to "png".
• D. Add the web-server address within the HTTP server allow list on the Expressway-C.

Answer: D

NEW QUESTION # 102
What is one of the user-related prerequisites for Jabber Team Messaging Mode Installation?

• A. Create user accounts in Cisco Unified IM and Presence.
• B. Create user accounts in Cisco Unified CM and Cisco Webex Control Hub.
• C. Create user accounts in Cisco Webex Control Hub only.
• D. Create user accounts in Cisco Unified Communications Manager only.

Answer: B

Explanation:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/12_7/cjab_b_deploy-jabber-team- messaging-mode127/cjab_b_deploy-jabber-team-messaging- mode127_chapter_01.html#reference_D52679AAB611676A42CA4EC335990695

NEW QUESTION # 103
What should be considered when using the Cisco Webex hybrid service?

• A. Expressway Connector is required for an on-premises Exchange server.
• B. Hybrid Message service works only with Jabber cloud deployment.
• C. Directory Connector is required for Azure AD.
• D. Directory Connector must be deployed for OBTP to work with on-premises video devices.

Answer: A

Explanation:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/spark/hybridservices/c alendarservice/cmgt_b_deploy-spark-hybrid-calendar-service/cmgt_b_deploy-spark-hybrid- calendar-service_chapter_011.html

NEW QUESTION # 104
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. The search rule must be changed to continue on match
• B. The underlying DNS issue must be resolved
• C. The existing zone using ID 7 must be deleted
• D. More bandwidth must be added to the appropriate pipes

Answer: A

NEW QUESTION # 105
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?

• A. Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.
• B. The call fails.
• C. The call is queued.
• D. Another node in the cluster is used and an intra-cluster cascade between the two Video Mesh nodes is formed.

Answer: D

NEW QUESTION # 106
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. Interworking in Expressway-C
• B. Transcoding in Expressway-C
• C. Interworking in Cisco Unified Communications Manager
• D. Transcoding in Cisco Unified Communications Manager

Answer: A

NEW QUESTION # 107
Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)

• A. passthrough
• B. H.245 user input indication
• C. unsolicited notify
• D. KPML
• E. RFC 2833

Answer: B,E

Explanation:
When the Expressway is interworking a call between SIP and H.323, it also interworks the DTMF signaling, but only between RFC 2833 DTMF, and the H.245 user input indicators "dtmf" and
"basicString".
https://jerome.pro:8443/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco- Expressway-Administrator-Guide-X12-5.pdf

NEW QUESTION # 108
What is the default DSCP value for video traffic that is routed through an Expressway server?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: D

NEW QUESTION # 109
When a Cisco Webex Video Mesh Node is configured for an organization, which process does the Webex Teams client use to discover the optimal bridging resource?

• A. the lowest STUN round-trip delay to each node and cloud
• B. an HTTPS speed and latency test to each node and the cloud
• C. the SIP delay header during call setup
• D. a reachable Video Mesh Node and then overflows to the cloud, if needed

Answer: D

NEW QUESTION # 110
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?

• A. Remove the cisco-uds SRV record for the external DNS.
• B. Change the collab-edge record to point to 5061.
• C. Change the priority of the SRV record for cisco-uds.
• D. Change cisco-uds to point to the Expressway-E FQDN.

Answer: A

NEW QUESTION # 111
......

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