Latest Jun 07, 2025 Real 300-820 Exam Dumps Questions Valid 300-820 Dumps PDF
Cisco 300-820 Exam Dumps - PDF Questions and Testing Engine
NEW QUESTION # 33
An organization has a domain name of example.com. Which two SRV records are valid for a SIP and H 323 communication? (Choose two)
- A. _sips._udp.example.com
- B. _sips_tcp.example.com
- C. _h323ls._udp.example.com
- D. _collab-edge._tls.example.com
- E. _h323ls_tcp.example.com
Answer: B,C
NEW QUESTION # 34
In Cisco Expressway, which information from an incoming search request does the pre-search transform configuration allow to be modified?
- A. called address
- B. calling party
- C. CLID
- D. Source IP address
Answer: A
NEW QUESTION # 35
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?
- A. Deploy Directory Connector.
- B. Open the TCP 443 port from IM and Presence to Webex Cloud.
- C. Deploy a Cisco Expressway Message Connector host.
- D. Deploy a Webex Device Connector.
Answer: A
NEW QUESTION # 36
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?
- A. pipe to the DefaultZone
- B. link to the DefaultZone
- C. route pattern to the DefaultZone
- D. SIP trunk to the DefaultZone
Answer: B
NEW QUESTION # 37
Which protocol should be used to verify the connectivity for different media paths found during a call using ICE?
- A. STUN
- B. RTP
- C. SNMP
- D. TURN
Answer: A
NEW QUESTION # 38
In which mode does the Cisco Expressway act as a SIP-H.323 gateway only if one or more of the endpoints are locally registered?
- A. registered only
- B. off
- C. on
- D. gateway only
Answer: A
NEW QUESTION # 39
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 a server certificate to the Expressway-C that is signed by a certificate authority.
- B. Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.
- C. Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
- D. Configure the Expressway-C Traversal Client zone transport protocol with TCP.
Answer: A
Explanation:
You can upload the server certificate with the full chain on it. The issue here seems to be the temporary cert.
NEW QUESTION # 40
An organization with a domain name of example.com.
Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)
- A. _sips._udp.example.com
- B. _h323ls._udp.example com
- C. _h323ls._tcp.example.com
- D. _sips._tcp.example.com
- E. _collab-edge._tls.example.com
Answer: B,D
Explanation:
The format of DNS SRV queries for sip (RFC 3263) and H.323 used by Expressway are:
_sips._tcp.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
_sip._udp.<fully.qualified.domain> - not recommended for video calls, only use for audio-only calls
_h323ls._udp.<fully.qualified.domain> - for UDP location (RAS) signaling, such as LRQ
_h323cs._tcp.<fully.qualified.domain> - for H.323 call signaling
The format of DNS SRV queries for sip (RFC 3263) and H.323 typically used by an endpoint are:
_sips._tcp.<fully.qualified.domain>
_sip._tcp.<fully.qualified.domain>
_sip._udp.<fully.qualified.domain> - not recommended for video calls, only use for audio-only calls
_h323ls._udp.<fully.qualified.domain> - for UDP location (RAS) signaling, such as LRQ
_h323cs._tcp.<fully.qualified.domain> - for H.323 call signaling
_h323rs._udp.<fully.qualified.domain> - for H.323 registrations
NEW QUESTION # 41
Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?
- A. Auto
- B. Best Effort
- C. Off
- D. Force Encrypted
Answer: A
Explanation:
Auto - no specific media encryption policy is applied by the Expressway. Media encryption is purely dependent on the target system/endpoint requests. This is the default behavior and is equivalent to how the Expressway operated before this feature was introduced.
NEW QUESTION # 42
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. Any
- B. Traversal Zone
- C. All
- D. Neighbor Zone
Answer: C
NEW QUESTION # 43
Which media encryption mode can be configured on an Expressway zone?
- A. Triple Data Encryption Standard
- B. IPsec
- C. Advanced Encryption Standard
- D. force unencrypted
Answer: D
NEW QUESTION # 44
Which technique can be used to have media flow directly between two endpoints that have a NAT between them?
- A. STUN makes UDP connections through NAT devices.
- B. The endpoints can use a Cisco router API to disable NAT temporarily.
- C. Cisco Mobile and Remote Access allows for media traffic directly between two internal endpoints.
- D. Cisco access protocol can make a direct path between endpoints on an internal network.
Answer: A
NEW QUESTION # 45
Refer to the exhibit.
Which description of the transformation is true?
- A. It converts [email protected]:<port> to [email protected]
- B. It changes [email protected]:<port> to [email protected]
- C. It converts [email protected]:<port> to [email protected]
- D. It changes all patterns that begin with [email protected]:<port> to [email protected]
Answer: C
NEW QUESTION # 46
How are Cisco Webex Video Mesh deployments supported?
- A. Video Mesh Dual NIC are supported in demilitarized deployments.
- B. Clustering Video Mesh Nodes over the WAN are supported if Round Trip Time is low.
- C. IPv6 and IPv4 deployments are supported for Video Mesh clusters.
- D. Mixed Single NIC and Dual NIC are supported in the same data center deployments.
Answer: A
NEW QUESTION # 47
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 SIP domains are added on Expressway Core.
- B. Ensure that the _cisco-uds SRV record has been configured.
- C. Ensure that the peer address does not match the Common Name on certificate.
- D. Ensure that the credential has been entered correctly.
Answer: D
NEW QUESTION # 48
A Webex engineer is configuring SSO in Control Hub with Active Directory Federation Services.
The engineer wants to authenticate users for all the applications that they are given rights to. The engineer also wants to eliminate further prompts when users switch applications during a particular session. Which action tells ADFS the fields to map to Webex to identify a user?
- A. Map the E-mail-addresses LDAP attribute to the uid outgoing claim type.
- B. Create claim rules for Webex authentication
- C. Add a relying party trust to the ADFS.
- D. Send LDAP attributes as claims.
Answer: A
NEW QUESTION # 49
Which mechanism does TLS use to validate identity?
- A. server certificate
- B. username and a password
- C. shared secret
- D. IP address of the peer
Answer: A
Explanation:
The TLS protocol uses endpoint authentication and encryption to provide secure connections over any network. Encryption protects against eavesdropping, and digital certificates (signed by a trusted CA) protect against tampering and message forgery by authenticating the endpoints.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/wsma/configuration/15-mt/wsma-15-mt- book/wsma-tls.pdf
NEW QUESTION # 50
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. Cloud Node US-EAST
- B. Video Mesh Cluster-2
- C. Both Cloud Node US-EAST and US-WEST
- D. Cloud Node US-WEST
Answer: B
NEW QUESTION # 51
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