Juniper JN0-451認定試験問題集には82練習テスト問題があります
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質問 # 26
Referring to the exhibit, what does the security alert indicate?
- A. An AP that is not part of the Mist Org is launching a DDoS attack on the Mist APs.
- B. An AP that is not part of the Mist Org is connected to the same wired network as the Mist APs.
- C. An AP that is not part of the Mist Org is operating in the same RF channel as the nearby Mist AP.
- D. An AP that is not part of the Mist Org is advertising the same SSIDs as the Mist APs.
正解：D
質問 # 27
You are asked to forward event messages from Mist to an external log collector.
In this scenario, which feature would enable this capability?
- A. syslog
- B. webhooks
- C. NETCONF
- D. SNMP traps
正解：A
解説：
Explanation
Syslog is a protocol that can be used to forward event messages from Mist to an external log collector.
質問 # 28
Which two authentication methods would be used with a guest portal? (Choose two.)
- A. Kerberos
- B. social login
- C. RSA
- D. external portal
正解：B、D
質問 # 29
RF templates are assigned to which Mist configuration object?
- A. WLANs
- B. sites
- C. config templates
- D. site groups
正解：C
質問 # 30
Click the Exhibit button.
Referring to the exhibit, which percentage of connection attempts failed on the access point named LD_RS_Support?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
解説：
The 37% of Successful Connects suggest that 63% failed - however, these are spread between both LD_Testbed_MD and LD_RS_Support. If the only AP with connection issues was LD_RS_Support then the reverse math may have worked.
質問 # 31
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The organization is using one license for Marvis wireless.
- B. The organization has two available licenses for Marvis wireless.
- C. The organization is using two licenses for Marvis wireless.
- D. The organization has one available license for Marvis wireless.
正解：A、B
質問 # 32
What are basic data rates?
- A. disabled data rates
- B. required data rates
- C. fastest data rates
- D. optional data rates
正解：B
質問 # 33
Which two fields are required when creating a new site? (Choose two.)
- A. location
- B. RF template
- C. site name
- D. time zone
正解：C、D
解説：
According to the Create a Mist Account and Organization - Mist document1, two fields that are required when creating a new site are:
Site name, which is a unique identifier for the site within the organization.
Time zone, which is used to display the correct time for events and reports related to the site.
質問 # 34
Mist WLAN objects are configurable at which two levels? (Choose two.)
- A. site
- B. access point
- C. organization
- D. site group
正解：A、B
質問 # 35
According to the Coverage SLE, which classifier tracks a client that transmits at a lower data rate than the AP to which it is connected?
- A. Slow OKC Roam
- B. Asymmetry Downlink
- C. Wi-Fi Interference
- D. Asymmetry Uplink
正解：D
質問 # 36
You have received a Marvis Actions Missing VLAN notification.
In this scenario, where is the problem?
- A. A client is missing the VLAN.
- B. The gateway is missing the VLAN.
- C. A switch is missing the VLAN.
- D. An access point is missing the VLAN.
正解：C
質問 # 37
You are deploying multiple Mist APs across many sites in your network. You must ensure that you can group similar devices together to easily apply consistent WxLAN policies across multiple sites.
Which configuration object should be used to accomplish this behavior?
- A. device profile
- B. RF template
- C. radio management
- D. organization labels
正解：A
解説：
When deploying multiple Mist APs across many sites in your network and grouping similar devices together to easily apply consistent WxLAN policies across multiple sites, you should use device profiles.
質問 # 38
Which Wireless Assurance SLE provides information on Opportunistic Key Caching (OKC)?
- A. Time to Connect
- B. Coverage
- C. Capacity
- D. Roaming
正解：D
解説：
Reference:
According to the Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide1, the Wireless Assurance SLE that provides information on Opportunistic Key Caching (OKC) is Roaming. OKC is a fast roaming technique that allows wireless clients and the WLAN infrastructure to cache only one PMK for client association with a WLAN, even when roaming between multiple APs.
質問 # 39
Your customer added an Apple TV in their conference room so that employees can easily share their screen.
However, the Apple TV cannot be discovered by the employees' devices.
Which two settings are causing the problem? (Choose two.)
- A. Broadcast/Multicast
- B. ARP
- C. MDNS
- D. Ignore Broadcast SSID Probe Requests
正解：A、C
解説：
Explanation
If a customer added an Apple TV in their conference room so that employees can easily share their screen but the Apple TV cannot be discovered by the employees' devices, two settings that could be causing this problem are MDNS and Broadcast/Multicast. So the correct answers are A. MDNS and B. Broadcast/Multicast.
質問 # 40
Which access points (APs) will be considered for inclusion in the AP Offline Marvis Action?
- A. all APs assigned to sites that have connected to the cloud previously
- B. all APs in inventory
- C. all purchased APs
- D. all APs assigned to sites
正解：D
質問 # 41
Regarding roaming, which device determines when it is time to connect to another AP?
- A. the primary AP
- B. the client device
- C. the current AP
- D. the gateway router
正解：B
質問 # 42
Click the Exhibit button.
Referring to the exhibit, in the USA, which two statements are correct? (Choose two.)
- A. The WLAN with SSID Eero1234 is configured to industry best practices.
- B. The WLAN with SSID Eero1234 is not configured to industry best practices.
- C. The WLAN with SSID NETGEAR24 is not configured to industry best practices.
- D. The WLAN with SSID NETGEAR24 is configured to industry best practices.
正解：B、D
解説：
Explanation
Referring to the exhibit and considering that it is in the USA, the WLAN with SSID Eero1234 is not configured to industry best practices while the WLAN with SSID NETGEAR24 is configured to industry best practices.
質問 # 43
Which two statements are true about 802.1X/EAP? (Choose two.)
- A. Credentials are exchanged with a RADIUS server prior to the 802.11 Association.
- B. Credentials are exchanged with a RADIUS server after the 802.11 Association.
- C. Credentials are exchanged with a RADIUS server after the 4-way Handshake.
- D. Credentials are exchanged with a RADIUS server prior to the 4-way Handshake.
正解：B、D
解説：
Explanation
According to Wikipedia1, 802.1X is an IEEE Standard for port-based network access control (PNAC). It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN using Extensible Authentication Protocol (EAP) over wired IEEE 802 networks and over 802.11 wireless networks, which is known as "EAP over LAN" or EAPOL.
The authentication process involves three parties: a supplicant (the client device), an authenticator (the network device such as an access point), and an authentication server (typically a RADIUS server). The supplicant must provide valid credentials to the authenticator before it can access the network resources.
The credentials are exchanged with a RADIUS server prior to the 4-way Handshake because the 4-way Handshake is used to establish encryption keys between the supplicant and authenticator after successful authentication2. The credentials are exchanged with a RADIUS server after the 802.11 Association because the 802.11 Association is used to establish a logical link between the supplicant and authenticator before authentication can take place3.
質問 # 44
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