[2024年01月] 検証済み Cisco 試験問題集 300-820 試験学習ガイド [Q77-Q101]

[2024年01月] 検証済みCisco試験問題集で300-820試験学習ガイド

ベスト品質のCisco 300-820試験解答リアル練習試験問題集で[2024]

質問 # 77
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 an intermediate certificate to the Expressway-C that is signed by a certificate authority.
D. Add a server certificate to the Expressway-C that is signed by a certificate authority.

正解：A

質問 # 78
Refer to the exhibit.

In an environment SIP devices are registered to CUCM and H.323 devices to VCS. What would be required to enable these calls to setup correctly?

A. Change the interworking mode to On.
B. Create a presearch transform.
C. Change the domain of SIP endpoint A to cisco.com.
D. Disable SIP in the external zone.

正解：A

質問 # 79
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. a reachable Video Mesh Node and then overflows to the cloud, if needed
C. the SIP delay header during call setup
D. an HTTPS speed and latency test to each node and the cloud

正解：B

質問 # 80
What it is the purpose of using ICE for Mobile and Remote Access endpoints in the Cisco Collaboration infrastructure?

A. ICE enables Cisco Collaboration endpoints to determine if there is direct connectivity between them.
B. ICE controls the bandwidth usage for Cisco Collaboration endpoints if the endpoints are located outside the company network.
C. ICE enablement allows for the Cisco Collaboration endpoint to register through Expressway servers to Cisco Unified Communications Manager behind a firewall.
D. ICE uses FAST updates to optimize the video quality in case of packet loss. This technology is available only from Cisco Unified CM version 11.5 and later.

正解：A

質問 # 81
Which commands disable SIP Inspection on the Cisco ASA FirePOWER firewall?

A. hostname(config)#policy-map global_policy
hostname(config-pmap)#class-map inspection_default
hostname(config-pmap)#no inspect sip
B. hostname(config)#policy-map global_policy
hostname(config-pmap)#class-map inspection default
hostname(config-pmap)#no inspect_sip
C. hostname(config)#no inspect_sip
D. hostname#no inspect sip

正解：A

質問 # 82
Refer to the exhibit.

When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?

A. 13358 is sent directly to the traversal 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 local zone.
D. 13358 is replaced by 135, and then is sent to the traversal zone.

正解：D

質問 # 83
In a Mobile and Remote Access deployment, where must communications be encrypted with TLS?

A. Cisco Expressway-C, Cisco Expressway-E, and endpoints outside the enterprise
B. Cisco Expressway-E and endpoints outside the enterprise
C. Cisco Expressway-C, Cisco Unified Communications Manager, and IM&P
D. Cisco Expressway-C, Cisco Expressway-E, and Cisco Unified Communications Manager

正解：A

解説：
All signaling between the Cisco Expressway-E and the external endpoints must be encrypted and depending on the endpoint software version, traffic must also be authenticated with certificates.
The communication between the Cisco Expressway-C and the Cisco Expressway-E must always be encrypted and authenticated using server certificates from both servers.
MRA requires secure communication between Expressway-C and Expressway-E, and between Expressway-E and external endpoints.
https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/118798- technote-cucm-00.html

質問 # 84
An engineer must configure the zone to connect to an Expressway-E using Single NIC with NAT.
The internal IP address is 192.168.10.63, and the NAT address is 203.0.113.5. What must the engineer configure on the Expressway-C to meet this requirement?

A. traversal zone with the peer address 192.168.10.63
B. neighbor zone with the peer address 192.168.10.63
C. traversal zone with the peer address of 203.0.113.5
D. neighbor zone with the peer address of 203.0.113.5

正解：A

質問 # 85
Which media encryption mode can be configured on an Expressway zone?

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

正解：A

質問 # 86
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 underlying DNS issue must be resolved
B. More bandwidth must be added to the appropriate pipes
C. The search rule must be changed to continue on match
D. The existing zone using ID 7 must be deleted

正解：A

質問 # 87
An engineer is deploying an Expressway solution for the SIP domain Cisco.com.
Which SRV record should be configured in the public DNS to support inbound B2B calls?

A. _collab-edge._tls.cisco.com
B. _cisco-uds._tcp.cisco.com
C. _cuplogin._tcp.cisco.com
D. _sip._tcp.cisco.com

正解：D

解説：
SIP B2B - Cisco SRV Records for business-to-business
_sips._tcp.domain 5061 TLS
_sip._tcp.domain 5060 TCP
_sip._udp.domain 5060 UDP

質問 # 88
Which two statements about Zones on Cisco Expressways are correct? (Choose two.)

A. Bandwidth for calls between endpoints in the same zone cannot be restricted.
B. You can register endpoints to default zone.
C. A neighbor zone connects Cisco Expressway Core to Cisco Expressway for NAT, PAT, and firewall traversal.
D. Endpoints are associated to default subzone or any customized subzone depending on the IP address of the endpoint.
E. A neighbor zone connects Cisco Expressway Core to other systems via SIP or H.323.

正解：A、C

質問 # 89
Which two licenses are required for the B2B feature to work? (Choose two.)

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

正解：A、E

質問 # 90
Which action is required when using Cisco Jabber for Cloud with Cisco Webex Messenger?

A. Configure policies.
B. Configure service discovery for remote access.
C. Configure desk phone control.
D. Configure, extend, and connect.

正解：B

質問 # 91
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 endpoint sent the private address to the external endpoint.
D. The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.

正解：C

質問 # 92
What is the purpose of a transform in the Expressway server?

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

正解：A

質問 # 93
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 underlying DNS issue must be resolved
B. More bandwidth must be added to the appropriate pipes
C. The search rule must be changed to continue on match
D. The existing zone using ID 7 must be deleted

正解：C

質問 # 94
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 makes it back to the endpoint because the endpoint sent the private address to the external endpoint.
C. The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.
D. The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.

正解：D

質問 # 95
Which configuration is required when implementing Mobile and Remote Access on Cisco Expressway?

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

正解：B

質問 # 96
Which service is available in a cloud-based deployment using Cisco Webex Messenger?

A. Presence
B. Call forward services
C. Voicemail
D. Phone services

正解：A

質問 # 97
Refer to the exhibit.

In an environment SIP devices are registered to CUCM and H.323 devices to VCS. What would be required to enable these calls to setup correctly?

A. Change the interworking mode to On.
B. Create a presearch transform.
C. Change the domain of SIP endpoint A to cisco.com.
D. Disable SIP in the external zone.

正解：A

質問 # 98
An engineer is deploying Mobile and Remote Access to allow external Cisco Jabber users to sign into a Cisco UCM cluster via Cisco Expressways. The users will sign-in in the format [email protected]. Contact photos for Jabber are hosted on a webserver with the FQDN of phonebook cisco.com. Which configuration must be completed to allow external Jabber users to see contact photos?

A. An HTTP allow list entry must be made on the Expressway-C for phonebook cisco.com.
B. A SIP allow list entry must be made on the Expressway-E for .*@cisco.com.
C. A SIP allow list entry must be made on the Expressway-C for .*@cisco.com.
D. An HTTP allow list entry must be made on the Expressway-E for phonebook cisco.com.

正解：A

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

正解：C

質問 # 100
Refer to the exhibit.

Which description of the transformation is true?