Cisco CCNP Enterprise 350-401 Questions & Answers

• Question 1191:

  Refer to the exhibit. A network engineer configures OSPF and reviews the router configuration Which interface or interfaces are able to establish OSPF adjacency?

  

  A. GigabitEthemet0/1 and GigabitEthernet0/1.40

  B. only GigabitEthernet0/1

  C. only GigabttEthernet0/0

  D. Gigabit Ethernet0/0 and GigabitEthemet0/1

  Correct Answer: C

• Question 1192:

  Which method creates an EEM applet policy that is registered with EEM and runs on demand or manually?

  A. event manager applet ondemand event register action 1.0 syslog priority critical msg 'This is a message from ondemand'

  B. event manager applet ondemand event manual action 1.0 syslog priority critical msg 'This is a message from ondemand'

  C. event manager applet ondemand event none action 1.0 syslog priority critical msg 'This is a message from ondemand'

  D. event manager applet ondemand action 1.0 syslog priority critical msg 'This is a message from ondemand'

  Correct Answer: C

  An EEM policy is an entity that defines an event and the actions to be taken when that event occurs. There are two types of EEM policies: an applet or a script. An applet is a simple form of policy that is defined within the CLI configuration.

  answer 'event manager applet ondemand event register

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  There are two ways to manually run an EEM policy. EEM usually schedules and runs policies on the basis of an event specification that is contained within the policy itself. The event none command allows EEM to identify an EEM policy that

  can be manually triggered. To run the policy, use either the action policy command in applet configuration mode or the event manager run command in privileged EXEC mode.

  Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/eem/configuration/xe-3s/eem-xe-3s-book/eem-policy-cli.html

• Question 1193:

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

  A. sniffer

  B. monitor

  C. bridge

  D. local

  Correct Answer: B

  The local and FlexConnect mode access points are designed to serve associated clients. These access points spend relatively less time performing off-channel scanning: about 50 milliseconds on each channel. If you want to perform high rogue detection, a monitor mode access point must be used. Alternatively, you can reduce the scan intervals from 180 seconds to a lesser value, for example, 120 or 60 seconds, ensuring that the radio goes off-channel more frequently, which improves the chances of rogue detection. However, the access point continues to spend about 50 milliseconds on each channel.

  https://www.cisco.com/c/en/us/td/docs/wireless/controller/7-4/configuration/guides/consolidated/b_cg74_CONSOLIDATED/b_cg74_CONSOLIDATED_chapter_010111000.html#:~:text=The%20local%20and%20FlexConnect%20mode% 20access%20points,spend%20about%2050%20milliseconds%20on%20each%20channel.

• Question 1194:

  Which DHCP option helps lightweight APs find the IP address of a wireless LAN controller?

  A. Option 43

  B. Option 60

  C. Option 67

  D. Option 150

  Correct Answer: A

• Question 1195:

  Which function is handled by vManage in the Cisco SD-WAN fabric?

  A. Establishes BFD sessions to test liveliness of links and nodes

  B. Distributes policies that govern data forwarding

  C. Performs remote software upgrades for WAN Edge. vSmart and vBond

  D. Establishes IPsec tunnels with nodes.

  Correct Answer: C

  We can remote upgrades WAN Edge, vSmart and vBond in vManage. https://sdwan-docs.cisco.com/Product_Documentation/vManage_Help/Release_18.4/Maintenance/Software_Upgrade

• Question 1196:

  An engineer is concerned with the deployment of a new application that is sensitive to inter-packet delay variance. Which command configures the router to be the destination of jitter measurements?

  A. Router(config)# ip sla responder udp-connect 172.29.139.134 5000

  B. Router(config)# ip sla responder tcp-connect 172.29.139.134 5000

  C. Router(config)# ip sla responder udp-echo 172.29.139.134 5000

  D. Router(config)# ip sla responder tcp-echo 172.29.139.134 5000

  Correct Answer: C

  Cisco IOS IP SLA Responder is a Cisco IOS Software component whose functionality is to respond to Cisco IOS IP SLA request packets. The IP SLA source sends control packets before the operation starts to establish a connection to the

  responder. Once the control packet is acknowledged, test packets are sent to the responder. The responder inserts a time-stamp when it receives a packet and factors out the destination processing time and adds time-stamps to the sent

  packets. This feature allows the calculation of unidirectional packet loss, latency, and jitter measurements with the kind of accuracy that is not possible with ping or other dedicated probe testing.

  Reference:

  UDP Jitter measures the delay, delay variation (jitter), corruption, misordering and packet loss by generating periodic UDP traffic. This operation always requires IP SLA responder. The command to enable UDP Jitter Operation is "ip sla

  responder udp-echo {destination-ip-address} [destination-port]

• Question 1197:

  What is the difference between CEF and process switching?

  A. CEF processes packets that are too complex for process switching to manage.

  B. CEF is more CPU-intensive than process switching.

  C. CEF uses the FIB and the adjacency table to make forwarding decisions, whereas process switching punts each packet.

  D. Process switching is faster than CEF.

  Correct Answer: C

  "Punt" is often used to describe the action of moving a packet from the fast path (CEF) to the route processor for handling. Cisco Express Forwarding (CEF) provides the ability to switch packets through a device in a very quick and efficient way while also keeping the load on the router`s processor low. CEF is made up of two different main components: the Forwarding Information Base (FIB) and the Adjacency Table. Process switching is the slowest switching methods (compared to fast switching and Cisco Express Forwarding) because it must find a destination in the routing table. Process switching must also construct a new Layer 2 frame header for every packet. With process switching, when a packet comes in, the scheduler calls a process that examines the routing table, determines which interface the packet should be switched to and then switches the packet. The problem is, this happens for the every packet.

• Question 1198:

  Which line must be added in the Python function to return the JSON object {"cat_9k": "FXS193202SE")?

  

  A. return (json.dumps({d['hostname']: d['serialNumber'] for d in json.loads(test_json)['response']}))

  B. return (json.dumps({for d in json.loads(test_json)['response']: d['hostname']: d['serialNumber']}))

  C. return (json.loads({d['hostname']: d['serialNumber'] for d in json.dumps(test_json)['response'}))

  D. return (json.loads({for d in json.dumps(test_json)['response']: d['hostname']: d['serialNumber']}))

  Correct Answer: A

  json.loads = from json to python json.dumps = from python to json

• Question 1199:

  Which measure is used by an NTP server to indicate its closeness to the authoritative time source?

  A. time zone

  B. hop count

  C. stratum

  D. latency

  Correct Answer: C

  NTP uses a stratum to describe the distance between a network device and an authoritative time source: A stratum 1 time server is directly attached to an authoritative time source (such as a radio or atomic clock or a GPS time source)

• Question 1200:

  At which Layer does Cisco DNA Center support REST controls?

  A. EEM applets or scripts

  B. Session layer

  C. YMAL output from responses to API calls

  D. Northbound APIs

  Correct Answer: D