Cisco 300-820 Online Practice Questions and Exam Preparation

Cisco 300-820 Online Questions & Answers

• Question 81:

  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 rst useable address. How must the Expressway-E be configured to allow proper routing to the internal and external networks?

  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. IP v4 gateway: 172.16.100.1, and a static route for the 192.168.20.0/24 subnet using LAN1
  D. IP v4 gateway: 172.16.100.1, and a static route for the 192.168.20.0/24 subnet using LAN1

• Question 82:

  An engineer learns from an end user that calls from outside the company are not being received. Calls are being made to other businesses outside of the company on video using URL addresses. The change management log shows no changes in the configuration of the collaboration solutions. The engineer examines the endpoint, which seems to be registered to the Cisco UCM, and the SIP trunk between the Cisco UCM and sees that the Expressway is also up. In addition, the traversal link shows no errors between the Expressways. Which action must the engineer take to troubleshoot this issue?

  A. On the Cisco UCM, run the Real-Time Monitoring Tool to see if any incoming calls fail.
  B. On the Expressway-E, run diagnostic logging under maintenance to see if any requests reach the system.
  C. On the Expressway-E, check the NTP settings to ensure that TLS will be able to terminate. If the clock is out of sync, incoming calls from other working systems would work bur not outgoing calls from the company.
  D. On the Expressway-C, run a network log under administrative tools to see if any requests reach the system.
  B. On the Expressway-E, run diagnostic logging under maintenance to see if any requests reach the system.

• Question 83:

  An Expressway pairs deployed for Mobile and Remote Access. An administrator installs a new server certificate on the Expressway-E. After installing the new certificate, the UC Traversal zone between Expressway-C and Expressway-E is active. Still, Jabber Mobile and Remote Access clients cannot log in over the Expressway. The certificate Common Name is the FQDN of Expressway-E, "expe01 example.com", and the certificate contains no additional names. Which Subject Alternate Name must be added to the certificate to allow Jabber Mobile and Remote Access clients to log in successfully?

  A. FQDN of the Expressway-C, "expc01.example.local"
  B. Registration domain, "example.com" or "collab-edge.example.com"
  C. Cisco UCM cluster FQDN, "cucmcluster.example.local"
  D. FQDN of the Expressway-E, "expe01.example.com"
  B. Registration domain, "example.com" or "collab-edge.example.com"

• Question 84:

  What is the name of the Webex core service that delivers group messaging, one-to-one messaging, presence, and file sharing?

  A. Cisco Webex Messaging
  B. Cisco Webex App
  C. Cisco Webex ONE
  D. Cisco Jabber Online
  A. Cisco Webex Messaging

• Question 85:

  Refer to the exhibit.

  

  Which SIP trunk security profile configuration on the Cisco UCM server is used for a secured SIP trunk to an Expressway server that is already integrated with the Cisco UCM for Mobile and Remote Access?

  A. Device Security Mode: Encrypted Incoming Transport Type: TLS Outgoing Transport Type: TLS Incoming Port*: 5061
  B. Device Security Mode: Encrypted Incoming Transport Type: TLS Outgoing Transport Type: TLS Incoming Port*: 6061
  C. Device Security Mode: Non-Secure Incoming Transport Type: TCP+UDP Outgoing Transport Type: TCP Incoming Port*: 5060
  D. Device Security Mode: Authenticated Incoming Transport Type: TLS Outgoing Transport Type: TLS Incoming Port*: 6061
  B. Device Security Mode: Encrypted Incoming Transport Type: TLS Outgoing Transport Type: TLS Incoming Port*: 6061

• Question 86:

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

  A. standard SIP over TCP port 5060
  B. signaling over HTTPS TCP port 443
  C. standard SIP TLS over TCP port 5061
  D. signaling over TCP port 444
  D. signaling over TCP port 444

• Question 87:

  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
  A. _collab-edge on port 8443

• Question 88:

  An engineer is investigating failing incoming calls that are expected to connect. The engineer notices that the failed calls all have a port number of 5060 at the end of the URI. The search rules are configured in a way that they do not expect a port to be included. Which configuration allows the routing of this call?

  A. * transform with a pattern string of *(.*)@example.com(:5060)?" * replace a suing of \[email protected]
  B. * search rule with a pattern string of "(.*)@example.com(:5050)?" * replace a string of \1\2@example com
  C. search rule with a pattern string of "(.*)@example.com(:5060)?" * replace a string of \[email protected]\2
  D. * transform with a pattern string of "(.*)@example.com(:5060)?" * replace a string of \[email protected]\2
  A. * transform with a pattern string of *(.*)@example.com(:5060)?" * replace a suing of \[email protected]

• Question 89:

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

• Question 90:

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

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