Which two steps are required for a complete Cisco DNA Center upgrade、 (Choose two.)完整的 Cisco DNA Center 升级需要哪两个步骤？ （选择两项。）

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• 1What 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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• 2Which 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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• 3What 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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• 4When 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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• 5Which 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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• 6What are two benefits of virtualizing the server with the use of VMs in a data center environment、 (Choose two.)在数据中心环境中使用 VM 虚拟化服务器有哪两个好处？ （选择两项。）

  A.reduced rack space, power, and cooling requirements

  B.smaller Layer 2 domain

  C.increased security

  D.speedy deployment

  E.reduced IP and MAC address requirements

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• 7Which statements are used for error handling in Python、哪些语句用于 Python 中的错误处理？

  A.try/catch

  B.catch/release

  C.block/rescue

  D.try/except

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• 8A network administrator is implementing a routing configuration change and enables routing debugs to track routing behavior during the change. The loggingoutput on the terminal is interrupting the command typing process.Which two actions can the network administrator take to minimize the possibility of typing commands incorrectly、 (Choose two.)网络管理员正在实施路由配置更改并启用路由调试以跟踪更改期间的路由行为。 终端上的日志输出中断了命令输入过程。 网络管理员可以采取哪两项措施来最大程度地减少错误键入命令的可能性？ （选择两项。）

  A.Configure the logging synchronous global configuration command.

  B.Configure the logging synchronous command under the vty.

  C.Increase the number of lines on the screen using the terminal length comman

  D.B.Configure the logging synchronous command under the vty.C.Increase the number of lines on the screen using the terminal length command.D.Configure the logging delimiter featur

  E.E.Press the TAB key to reprint the command in a new line.

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• 9Which two pieces of information are necessary to compute SNR、 (Choose two.)计算 SNR 需要哪两条信息？ （选择两项。）

  A.transmit power

  B.noise floor

  C.EIRP

  D.antenna gain

  E.RSSI

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• 10An engineer configures a WLAN with fast transition enabled. Some legacy clients fail to connect to this WLAN.Which feature allows the legacy clients to connect while still allowing other clients to use fast transition based 工程师配置启用快速转换的 WLAN。 一些旧客户端无法连接到此 WLAN。该功能允许旧客户端连接，同时仍允许其他客户端使用基于快速转换的

  A.over the DS

  B.802.11k

  C.adaptive R

  D.802.11v

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