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Cisco Certification
350-401 Exam
Cisco.350-401.v2022-10-04.q446 Dumps

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Question 406

Drag and drop the Cisco SD-Access solution areas from the left onto the protocols they use on the right.

Correct Answer:

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Question 407

Refer to exhibit.

What are two reasons for IP SLA tracking failure? (Choose two )

A.The source-interface is configured incorrectly
B.The destination must be 172.30.30.2 for icmp-echo
C.A route back to the R1 LAN network is missing in R2
D.The default route has wrong next hop IP address
E.The threshold value is wrong

Correct Answer: C,E

Explanation
Timeout (in milliseconds) sets the amount of time an IP SLAs operation waits for a response from its request packet. In other words, the timeout specifies how long the router should wait for a response to its ping before it is considered failed.Threshold (in milliseconds too) sets the upper threshold value for calculating network monitoring statistics created by an IP SLAs operation. Threshold is used to activate a response to IP SLA violation, e.g. send SNMP trap or start secondary SLA operation. In other words, the threshold value is only used to indicate over threshold events, which do not affect reachability but may be used to evaluate the proper settings for the timeout command.
For reachability tracking, if the return code is OK or OverThreshold, reachability is up; if not OK, reachability is down.
This
tutorial can help you revise IP SLA tracking topic:
http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/813-cisco-router-ipsla-basic.html and
http://www.ciscozine.com/using-ip-sla-to-change-routing/
Note: Maybe some of us will wonder why there are these two commands:
R1(config)#ip route 0.0.0.0 0.0.0.0 172.20.20.2 track 10 R1(config)#no ip route 0.0.0.0 0.0.0.0 172.20.20.2 In fact the two commands:
ip route 0.0.0.0 0.0.0.0 172.20.20.2 track 10 ip route 0.0.0.0 0.0.0.0 172.20.20.2 are different. These two static routes can co-exist in the routing table. Therefore if the tracking goes down, the first command will be removed but the second one still exists and the backup path is not preferred. So we have to remove the second one.

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Question 408

Which protocol is responsible for data plane forwarding in a Cisco SD-Access deployment?

A.VXLAN
B.IS-IS
C.OSPF
D.LISP

Correct Answer: A

Explanation
In SD-Access the control plane is based on LISP (Locator/ID Separation Protocol), the data plane is based on VXLAN (Virtual Extensible LAN), the policy plane is based on Cisco TrustSec, and the management plane is enabled and powered by Cisco DNA Center.
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html#:~:text=In%20SD%

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Question 409

Drag and drop the virtual components from the left onto their deceptions on the right.

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Question 410

During deployment, a network engineer notices that voice traffic is not being tagged correctly as it
traverses the network. Which COS to DSCP map must be modified to ensure that voice traffic is
treated properly?

A.COS of 5 to DSCP 46
B.COS of 7 to DSCP 48
C.COS of 6 to DSCP 46
D.COS of 3 to DSCP of 26

Correct Answer: A

CoS value 5 is commonly used for VOIP and CoS value 5 should be mapped to DSCP 46. DSCP 46 is defined as being for EF (Expedited Forwarding) traffic flows and is the value usually assigned to all interactive voice and video traffic. This is to keep the uniformity from end-to-end that DSCP EF (mostly for VOICE RTP) is mapped to COS 5.
Note:
+ CoS is a L2 marking contained within an 802.1q tag,. The values for CoS are 0 - 7 + DSCP is a L3 marking and has values 0 - 63 + The default DSCP-to-CoS mapping for CoS 5 is DSCP 40

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