Cisco 300-820試験情報と無料練習テストはこちら
合格させるCisco 300-820プレミアムお試しセットテストエンジンPDFで無料問題集セット
質問 # 12
Which two types of information does Cisco Expressway back up? (Choose two.)
- A. IP addresses
- B. security certificates
- C. current call states
- D. call records
- E. log files
正解：B、C
質問 # 13
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 fails.
- C. Another node in the cluster is used and an intra-cluster cascade between Webex and the new Video Mesh node is formed.
- D. The call is queued.
正解：A
質問 # 14
Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?
- A. traversal subzone
- B. search rule
- C. call routing
- D. call policy
正解：C
解説：
Reference:
https://cmslab.ciscolive.com/pod8/cucm/expctrunk
質問 # 15
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. _sips._tcp.example.com
- C. _collab-edge._tls.example.com
- D. _h323ls._udp.example com
- E. _h323ls._tcp.example.com
正解：B、D
解説：
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
質問 # 16
Which part of a hybrid cloud-based deployment with Cisco Webex Messenger Service is used for meeting capabilities?
- A. Cisco Unified CM is always used for meeting capabilities.
- B. Cisco Webex Meeting Center is always used for meeting capabilities.
- C. Depending on the origin of the user, the Webex Meeting Center or local Cisco Unified Communications Manager meeting resources are used for meeting capabilities.
- D. Depending on the media flow, the Webex Meeting Center or local Cisco Unified CM meeting resources are used for meeting capabilities.
正解：A
質問 # 17
Which two statements about Cisco Webex Video Mesh Nodes are true? (Choose two.)
- A. Cloud-registered devices choose a VMN cluster based on the lowest STUN round trip delay.
- B. A VMN can terminate a media connection while operating in maintenance mode.
- C. When Cisco Unified Communications Manager works with multiple VMNs, Cisco Unified CM decides which VMN is used for signaling connection.
- D. When Expressway Core works with VMN clusters, Expressway Core decides which VMN is used for signaling/media connection.
- E. The cascading traffic between VMN must bypass the firewall.
正解：A、C
解説：
In Unified CM, each SIP trunk can support up to 16 Video Mesh destinations (IP addresses).
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/videomesh/cmgt_ b_webex-video-mesh-deployment-guide/cmgt_b_hybrid-media-deployment- guide_chapter_011.html
質問 # 18
An organization wants to be able to call IP addresses and URI addresses. An engineer must configure Cisco Expressways to manage this request from the endpoints in the organization. How would the engineer configure the Expressways to allow these calls to be completed to external IP addresses?
- A. Set calls to unknown IP addresses to indirect on the Expressway-C and direct on the Expressway-E, and add a search rule on the Expressway-E
- B. Use search rules to manage calls to IP addresses, and the direct/indirect setting on the Expressway is used as a fallback only if the search rules do not exist
- C. Set calls to unknown IP addresses to indirect on the Cisco Expressways, and add a search rule on the Expressway-E
- D. Set calls to unknown IP addresses to direct on the Cisco Expressways, and add a search rule on the Expressway-E
正解：B
質問 # 19
Refer to the exhibit.
Which description of the transformation is true?
- A. It converts [email protected]:<port> to [email protected]
- B. It changes all patterns that begin with [email protected]:<port> to [email protected]
- C. It converts [email protected]:<port> to [email protected]
- D. It changes [email protected]:<port> to [email protected]
正解：C
質問 # 20
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. _cisco-uds on port 8443
- C. _collab-edge on port 5061
- D. _collab-edge on port 8443
正解：D
解説：
8443 is required from the public IP address of the expressway for collab-edge SRV records.
質問 # 21
Refer to the exhibit. The administrator attempted to log in, but Jabber clients cannot log in via mobile and remote access. How is this issue resolved?
- A. A DNS SRV record must be created for _collab-edge._tls.pod1.local that points to the Expressway-E.
- B. Skype for Business mode must be disabled on the DNS server because it conflicts with Jabber login requirements.
- C. The domain pod1.local must be deprovisioned from the Webex cloud for Jabber logins.
- D. The username [email protected] is invalid. The user should instead sign-in simply as jabberuser.
正解：A
質問 # 22
Which two statements about Mobile and Remote Access certificate are true? (Choose two.)
- A. The Jabber client can work with public or private CA signed certificate.
- B. Expressway must generate certificate signing request.
- C. Expressway Edge must use public CA signed certificate.
- D. You must upload the root certificates in the phone trust store.
- E. Expressway Core can use private CA signed certificate.
正解：C、E
解説：
Public vs. Private Certificate Authority (CA)
There are a number of options to sign certificates on the Expressway-C and E servers. You can opt to have the Certificate Signing Request (CSR) signed by a public CA such as GoDaddy, Verisign, or others, or you can sign it internally using your own Certificate Authority (CA) (can either be self signed using openSSL or an internal enterprise CA such as a Microsoft Windows server).
The only server that is really required to be signed by a public CA is the Expressway-E. This is the only server that clients will see the certificate from when singing in via MRA therefore using a public CA will ensure that users do not have to manually accept the certificate. Using an internal CA to sign the Expressway-E will work but first time users will be prompted to accept the untrusted certificate. MRA registration of 7800 and 8800 series phones also will not work with internal certificates because their certificate trust list cannot be modified. For simplicity it is suggested that your Expressway-C and Expressway-E certificates both be signed by the same CA however this is not a requirement as long as you properly configured the trusted CA lists on both servers.
https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/213872- configure-and-troubleshoot-collaboration.html
質問 # 23
Which two licenses are required for the Expressway B2B feature to work? (Choose two)
- A. Device Provisioning
- B. TURN Relays
- C. Advanced Networking
- D. Rich Media Sessions
- E. Traversal Server
正解：D、E
質問 # 24
During the deployment of a Cisco Webex Video Mesh, where do on-premises SIP endpoints send signaling?
- A. to the switching services
- B. On-premises endpoints cannot participate in Cisco Webex Video Mesh
- C. to the cloud
- D. to the call control environment (Unified CM or Expressway)
正解：D
質問 # 25
Which two licenses are required for the B2B feature to work? (Choose two.)
- A. TURN Relays
- B. Device Provisioning
- C. Traversal Server
- D. Advanced Networking
- E. Rich Media Sessions
正解：A、E
質問 # 26
When designing the call control on a Cisco Expressway Core, which is the sequence of dial plan functions?
- A. transforms, CPL, user policy, search rules
- B. search rules, zones, local zones
- C. search rules, transforms
- D. DNS zone, local zone, search rules
正解：A
質問 # 27
Which two types of information does Cisco Expressway back up? (Choose two.)
- A. IP addresses
- B. call records
- C. current call states
- D. security certificates
- E. log files
正解：B、D
解説：
The data saved to a backup file includes:
- Bootstrap key (from X8.11)
- System configuration settings
- Clustering configuration
- Local authentication data (but not Active Directory credentials for remotely managed accounts)
- User account and password details
- Server security certificate and private key
- Call detail records (if the CDR service on Expressway is enabled)
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/admin_guide/Cisco- Expressway-Administrator-Guide-X8-11-4.pdf
質問 # 28
Drag and Drop Question
Drag and drop the services from the left onto their descriptions on the right. Some services are used more than once.
正解：
解説：
質問 # 29
Which two statements about Expressway media traversal are true? (Choose two.)
- A. Expressway Control is the traversal server installed in the DMZ.
- B. Both Expressway Edge interfaces can be NATed.
- C. The Unified Communications traversal zone can be used for Mobile and Remote Access.
- D. Cisco Unified Communications Manager zone can be either traversal server or client.
- E. The Expressway Edge must be put in a firewall DMZ segment.
正解：C、E
解説：
Explanation
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-10/Cisco-Expressway
質問 # 30
An administrator has been asked to configure Video Mesh signaling traffic to route through a proxy.
Which is an available proxy type in the Video Mesh node configuration to support this deployment model?
- A. Reverse Proxy
- B. Distorting Proxy
- C. Transparent Inspecting Proxy
- D. Transparent Explicit Proxy
正解：C
解説：
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/videomesh/cmgt_ b_webex-video-mesh-deployment-guide/cmgt_b_hybrid-media-deployment- guide_chapter_01.html
質問 # 31
Which connection does the traversal zone configuration define?
- A. Cisco UCS E-Series and Cisco UCM
- B. Cisco Expressway-C and Cisco Expressway-E platforms
- C. Expressway-E and Collaboration Endpoints
- D. Cisco UC and Cisco Unified Presence Server
正解：B
解説：
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-
11/Cisco-Expressway-Basic-Configuration-Deployment-Guide-X8-11-4.pdf
質問 # 32
What allows endpoints behind a NAT to discover the paths through which they will pass media?
- A. SNMP
- B. RTP
- C. ICE
- D. TLS
正解：C
質問 # 33
......
更新された公式認定は300-820認証済みの300-820問題集でPDF：https://jp.fast2test.com/300-820-premium-file.html
2023年最新の実際に出る300-820問題集テストエンジン試験問題はここにある：https://drive.google.com/open?id=1gGrpvMHfC9ua07dD_Vz-uQLtN7YiQQLB