300-820 by Cisco Valid Free Exam Practice Test

Question 1

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 "[email protected]" is also registered. How is this issue resolved?

A. Calling parties are placing calls with the wrong domain. End-users must be instructed not to use the B. The calls are failing because there are insufficient licenses. Additional licenses must be installed for the Expressway to route these calls. C. 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. D. The current search rule does not match the call, so the search rule must be modified to include a SIP Variant of "Standards-Based".

Correct Answer: C

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Question 2

Which connection does the traversal zone configuration define?

A. Cisco UC and Cisco Unified Presence Server B. Expressway-E and Collaboration Endpoints C. Cisco Expressway-C and Cisco Expressway-E platforms D. Cisco UCS E-Series and Cisco UCM

Correct Answer: C

Question 3

Which step is taken when configuring a Cisco Expressway solution?

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

Correct Answer: D

Question 4

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

A. The ICE protocol enables the use of MRA for Cisco endpoints to register behind the firewall. B. It can traverse firewalls without opening incoming ports. C. The endpoints use fewer ports to minimize the port range and allows for multiple connections in a high-density deployment. D. The endpoints discover paths to optimize media flow and allows for peer-to-peer media traffic in some cases.

Correct Answer: D

Question 5

Refer to the exhibit.

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

A. The Cisco TelePresence endpoint registered with the URI [email protected] must be set in *do not disturb" mode. B. The default zone on the Expressway-E must not be configured to treat as authenticated. C. SIP TLS must be disabled on the Expressway-E. D. A search rule must be configured with an extract match forvip^cisco.com to pass the call to the Expressway-C.

Correct Answer: B

Question 6

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. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority. B. Add a server certificate to the Expressway-C that is signed by a certificate authority. C. Configure the Expressway-C Traversal Client zone transport protocol with TCP. D. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.

Correct Answer: B

Question 7

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

A. _cisco-uds-edge on port 5061 B. _collab-edge on port 5061 C. _cisco-uds on port 8443 D. _collab-edge on port 8443

Correct Answer: D

Question 8

Cisco media traversal technology has enabled a secure environment where internal video endpoints call and receive calls from external video endpoints. How does the Expressway-C and Expressway-E communicate?

A. Expressway-C establishes an outgoing request to Expressway-E, enabling the Expressway-E in the DMZ to notify the internal Expressway-C of an incoming call from an external endpoint. B. Internal endpoints are registered to Expressway-E in the DMZ. Expressway-C, which is also in the DMZ, will receive and make calls on behalf of Expressway-E because they are in the same network. C. Internal endpoints are registered to Expressway-C in the DMZ. Expressway-E, which is also in the DMZ, will receive and make calls on behalf of Expressway-C because they are in the same network. D. Expressway-E establishes an outgoing request to Expressway-C, enabling the Expressway-C in the DMZ to notify the internal Expressway-E of an incoming call from an external endpoint.

Correct Answer: A

Question 9

Which option changes the addresses and ports in voice and video signaling messages?

A. Firewall ALG B. NAT overload C. NAT ALG D. NAT Pinhole

Correct Answer: C

Question 10

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.)

A. Securephone.cisco.com on the Expressway-C 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 CallManager certificate

Correct Answer: A,D

Question 11

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

A. Off B. Force Encrypted C. Auto D. Best Effort

Correct Answer: C

Question 12

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

A. Configuration > Policy > Inbound > Rules B. Configuration > Call Policy > Rules C. Configuration > Call History > Policy > Rules D. Call History Configuration > Call Policy > Rules

Correct Answer: B

Question 13

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?

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

Correct Answer: D

Question 14

Which describes what could done on the Expressway-E to successfully route calls from Expressway-C on the internal network to the Internet?

A. The Expressway-E could be enabled for Dual-NIC capability. B. A static NAT route could be added to the firewall to bridge the two networks. C. Application layer gateway could be enabled to bridge the media traffic. D. The Expressway-E could be enabled for interworking.

Correct Answer: A

Question 15

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

A. Cisco Unified Communications Manager zone can be either traversal server or client. B. The Unified Communications traversal zone can be used for Mobile and Remote Access. C. Expressway Control is the traversal server installed in the DMZ. D. The Expressway Edge must be put in a firewall DMZ segment. E. Both Expressway Edge interfaces can be NATed.

Correct Answer: B,D

Cisco Implementing Cisco Collaboration Cloud and Edge Solutions - 300-820 Exam Practice Test