Which AP mode allows an engineer to scan configured channels for rogue access points?

• A.sniffer
• B.monitor
• C.bridge
• D.local

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Which two conditions are required for tracking the interface IP routing state? (Choose two.)

• A.Cisco Express Forwarding must be disabled on the interface.
• B.A VRF must be enabled on the interface.
• C.IP routing must be disabled on the interface.
• D.A known IP address must be configured on the interface.
• E.The interface line protocol must be up.

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An engineer is working with the Cisco DNA Center API Drag and drop the methods from the left onto the actions that they are used for on the right.

Correct Answer:

Explanation

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In cisco SD_WAN, which protocol is used to measure link quality?

• A.OMP
• B.IPsec
• C.RSVP
• D.BFD

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What NTP Stratum level is a server that is connected directly to an authoritative time source?

• A.Stratum 0
• B.Stratum 1
• C.Stratum 14
• D.Stratum 15

Correct Answer: B

Explanation
The stratum levels define the distance from the reference clock. A
reference clock is a stratum 0 device that is assumed to be accurate and has little or no delay associated with it. Stratum 0 servers cannot be used on the network but they are directly connected to computers which then operate as stratum-1 servers. A stratum 1 time server acts as a primary network time standard.

A stratum 2 server is connected to the stratum 1 server; then a stratum 3 server is connected to the stratum 2 server and so on. A stratum 2 server gets its time via NTP packet requests from a stratum 1 server. A stratum 3 server gets its time via NTP packet requests from a stratum-2 server... A stratum server may also peer with other stratum servers at the same level to provide more stable and robust time for all devices in the peer group (for example a stratum 2 server can peer with other stratum 2 servers).
NTP uses the concept of a stratum to describe how many NTP hops away a
machine is from an authoritative time source. A stratum 1 time server
typically has an authoritative time source (such as a radio or atomic clock, or a Global Positioning System (GPS) time source) directly attached, a stratum 2 time server receives its time via NTP from a stratum 1 time server, and so on.

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