Which protocol does REST API rely on to secure the communication channel、REST API 依赖哪种协议来保护通信通道？

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• 1Refer to this output.R1# *Feb 14 37:09:53.129: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to upWhat is the logging severity level、请参阅此输出。R1# *Feb 14 37:09:53.129: %LINEPROTO-5-UPDOWN：接口 GigabitEthernet0/1 上的线路协议，将状态更改为日志严重性级别是什么？

  A.notification

  B.emergency

  C.critical

  D.alert

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• 2Which PAgP mode combination prevents an EtherChannel from forming、哪种 PAgP 模式组合会阻止形成 EtherChannel？

  A.auto/desirable

  B.desirable/desirable

  C.desirable/auto

  D.auto/auto

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• 3If a VRRP master router fails, which router is selected as the new master router、如果 VRRP 主路由器出现故障，选择哪个路由器作为新的主路由器？

  A.router with the lowest priority

  B.router with the highest priority

  C.router with the highest loopback address

  D.router with the lowest loopback address

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• 4Which QoS component alters a packet to change the way that traffic is treated in the network、哪个 QoS 组件会更改数据包以更改网络中处理流量的方式？

  A.policing

  B.classification

  C.marking

  D.shaping

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• 5Which two mechanisms are available to secure NTP、 (Choose two.)哪两种机制可用于保护 NTP？ （选择两项。）

  A.IPsec

  B.IP prefix list-based

  C.encrypted authentication

  D.TACACS-based authentication

  E.IP access list-based

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• 6Which behavior can be expected when the HSRP version is changed from 1 to 2、当 HSRP 版本从 1 更改为 2 时，会出现哪些行为？

  A.No changes occur because the standby router is upgraded before the active router.

  B.No changes occur because version 1 and 2 use the same virtual MAC OUI.

  C.Each HSRP group reinitializes because the virtual MAC address has change

  D.D.Each HSRP group reinitializes because the multicast address has changed.

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• 7When using TLS for syslog, which configuration allows for secure and reliable transportation of messages to its default port、将 TLS 用于 Syslog 时，哪种配置允许将消息安全可靠地传输到其默认端口？

  A.logging host 10.2.3.4 vrf mgmt transport tcp port 514

  B.logging host 10.2.3.4 vrf mgmt transport udp port 514

  C.logging host 10.2.3.4 vrf mgmt transport tcp port 6514

  D.logging host 10.2.3.4 vrf mgmt transport udp port 6514

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• 8What are two common sources of interference for Wi-Fi networks、 (Choose two.)Wi-Fi 网络的两个常见干扰源是什么？ （选择两项。）

  A.LED lights

  B.radar

  C.fire alarm

  D.conventional oven

  E.rogue AP

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• 9Which JSON syntax is valid、哪种 JSON 语法有效？

  A.{“switch”: “name”: “dist1”, “interfaces”: [“gig1”, “gig2”, “gig3”]}

  B.{/“switch/”: {/“name/”: “dist1”, /“interfaces/”: [“gig1”, “gig2”, “gig3”]}}

  C.{“switch”: {“name”: “dist1”, “interfaces”: [“gig1”, “gig2”, “gig3”]}}

  D.{‘switch’: (‘name’: ‘dist1’, ‘interfaces’: [‘gig1’, ‘gig2’, ‘gig3’])}

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• 10What is a benefit of data modeling languages like YANG、像 YANG 这样的数据建模语言有什么好处？

  A.They create more secure and efficient SNMP OIDs.

  B.They provide a standardized data structure, which results in configuration scalability and consistency.

  C.They enable programmers to change or write their own applications within the device operating system.

  D.They make the CLI simpler and more efficient.

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