A Review Of Download 300-820 Test Questions

NEW QUESTION 1
When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is modified to reflect the NAT address?

• A. SDP b-line
• B. SIP record route
• C. SDP c-line
• D. SDP m-line

Answer: C

NEW QUESTION 2

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. 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.

Answer: D

NEW QUESTION 3
Which role does Call Policy play when preventing toll fraud on Expressways?

• A. It controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination.
• B. It changes the calling and called number on a call.
• C. It changes the audio protocol used by a call through Expressways.
• D. It changes the audio codec used in a call through Expressways.

Answer: A

NEW QUESTION 4
What is a key configuration requirement for Hybrid Message Service High Availability deployment with multiple IM and Presence clusters?

• A. You must have the Intercluster Sync Agent working across your IM and Presence clusters.
• B. You must have the Intercluster Lookup Service working across all of your IM and Presence clusters.
• C. Your IM and Presence Service clusters must have Multiple Device Messaging disabled.
• D. AXL service should be activated only on the publisher of each IM and Presence cluster.

Answer: A

NEW QUESTION 5
Cisco Collaboration endpoints are exchanging encrypted signaling messages.
What is one major complication in implementing NAT ALG for voice and video devices?

• 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.

Answer: B

NEW QUESTION 6

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?

• A. Traversal Zone
• B. Any
• C. Neighbor Zone
• D. All

Answer: D

NEW QUESTION 7
Which configuration is required when implementing Mobile and Remote Access on Cisco Expressway?

• A. IPS
• B. SAML authentication
• C. Cisco Unified CM publisher address
• D. SSO

Answer: C

NEW QUESTION 8
Which media encryption mode can be configured on an Expressway zone?

• A. Advanced Encryption Standard
• B. IPsec
• C. Triple Data Encryption Standard
• D. force unencrypted

Answer: A

NEW QUESTION 9
A company already has a Cisco Unified Communications Manager for internal audio and video traffic, but it requires video communication with external partners and customers. It is important to ensure security for the deployment and the connectivity.
What must be set up to enable this requirement?

• A. Cisco Unified Border Element and Cisco ASA Firewall
• B. Cisco Unified Border Element and Cisco Firepower Firewall
• C. Cisco Expressway-C and Cisco Expressway-E
• D. Cisco Expressway-C and Cisco Unified Border Element

Answer: C

NEW QUESTION 10
Which step is taken when configuring a Cisco Expressway solution?

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

Answer: B

NEW QUESTION 11

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?

• A. Both Cloud Node US-EAST and US-WEST
• B. Video Mesh Cluster-2
• C. Cloud Node US-EAST
• D. Cloud Node US-WEST

Answer: B

NEW QUESTION 12
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?

• 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.

Answer: C

NEW QUESTION 13
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. 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.

Answer: C

NEW QUESTION 14
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 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.

Answer: D

NEW QUESTION 15
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.

Answer: A

NEW QUESTION 16
What is the Cisco-recommended key length in bits for a Cisco Expressway certificate?

• A. 1024
• B. 2048
• C. 4096
• D. 8192

Answer: C

NEW QUESTION 17
Refer to the exhibit. When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?

• 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.

Answer: C

NEW QUESTION 18

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

• A. d20d16d20d22
• B. 2091652010224
• C. 209165200225
• D. d209d165d200d224
• E. 209165200224

Answer: CE

NEW QUESTION 19
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

Answer: A

NEW QUESTION 20
What is the purpose of a transform in the Expressway server?

• A. A transform has the function as a neighbor zone in the Expresswa
• B. It creates a connection with another server.
• C. A transform changes the audio codec when the call goes through the Expressway.
• D. A transform is used to route calls to a destination.
• E. A transform changes an alias that matches certain criteria into another alias.

Answer: D

NEW QUESTION 21
Which two licenses are required for the B2B feature to work? (Choose two.)

• A. Traversal Server
• B. TURN Relays
• C. Rich Media Sessions
• D. Advanced Networking
• E. Device Provisioning

Answer: CE

NEW QUESTION 22

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. 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.

Answer: C

NEW QUESTION 23
A Cisco Webex Hybrid Video Mesh Node can be installed in the DMZ and on the internal network.
Which statement is true?

• 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 client
• E. A DMZ node is added for extra security.

Answer: C

NEW QUESTION 24
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. 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.

Answer: A

NEW QUESTION 25
A Jabber user is being prompted to trust the Expressway-E certificate when using Mobile and Remote Access. The administrator has validated that the Expressway-E certificate is being trusted by the machine running the Jabber client.
What else can be done to solve this problem?

• A. Create a new CSR with new information on the SAN field.
• B. Include Cisco Unified Communications Manager registration domain in the Expressway-E certificate as a SAN.
• C. Change the domain name.
• D. Change the FQDN of the Expressway.

Answer: B

NEW QUESTION 26
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