350-401 practice questions 631–640

1. Question 631 · 1003 in bank

   Select 2

   Which of the following statements regarding the use of Bidirectional Forwarding Detection (BFD) in a Cisco SD-WAN environment are true?

   • ABFD cannot be disabled on SD-WAN routers.
   • BOSPFv3 is not supported with BFD.
   • CIn addition to link failure detection, it is also used to measure loss and latency used by application aware routing.
   • DIs not typically enabled for OMP.
   • EDoes not support BGP.

   Show answer

   Answer: AC

   Explanation

   Answer provided is correct: Runs on SD-WAN tunnel to detect failures in the overlay tunnel Is enabled by default and cannot be disabled Is typically enabled for OMP Besides link failures, it also measures latency, loss, and other link statistics used by application-aware routing https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/routing/ios-xe-17/routing-book-xe/m-bfd-for-routing-protocols.html#Cisco_Concept.dita_26cf6354-cce5-4799-b140-f518adc78a40

   Source: Adapted from community discussion — Tacolicious

   References

   • Cisco documentation

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2. Question 632 · 1003 in bank

   Select 2

   Which of the following statements are true regarding the Link Management Protocol (LMP) when used in the Cisco Stackwise virtual link? (Choose two.)

   • AIt determines the switch priority.
   • BIt negotiates the version of the virtual header
   • CIt verifies link integrity via bidirectional forwarding
   • DIt performs auto discovery of other active Stackwise switches

   Show answer

   Answer: BC

   Explanation

   Answer provided is correct: The Link Management Protocol (LMP) is activated on each link of the StackWise Virtual link as soon as it is brought up online. The LMP performs the following functions: ● Verifies link integrity by establishing bidirectional traffic forwarding, and rejects any unidirectional links ● Exchanges periodic hellos to monitor and maintain the health of the links ● Negotiates the version of StackWise Virtual header between the switches StackWise Virtual link role resolution https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-stack-wp-cte-en.html

   Source: Adapted from community discussion — Tacolicious

   References

   • Cisco documentation

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3. Question 633 · 1003 in bank

   You have configured router R1 with multiple VRF’s in order to support multiple customer VPN networks. If you wanted to see the best path for the 10.2.1.0.24 route in VRF Green, what command would you use?

   • Ashow ip route vrf Green 10.2.1.0
   • Bshow ip route 10.2.1.0 vrf Green
   • Cshow route all 10.2.1.0
   • Dshow ip route 10.2.1.0 Green

   Show answer

   Answer: A

   Explanation

   cisco#show ip vrf Name Default RD Interfaces RED 1:1 Lo0 cisco#show ip route vrf RED | b Gate Gateway of last resort is not set 10.0.0.0/32 is subnetted, 1 subnets C 10.0.0.1 is directly connected, Loopback0 cisco# A. is true

   Source: Adapted from community discussion — nushadu

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4. Question 634 · 1003 in bank

   Select 2

   Which of the following are benefits from implementing the use of VXLAN’s in a network? (Choose two)

   • AIncreased scalability since VXLAN extends the IF field to 24 bits, providing up to 16 million unique ID values.
   • BMakes the implementation of Spanning Tree more efficient.
   • CCan be used to replace layer 3 routing protocols and increase routing efficiency at layer 2.
   • DSupports Equal Cost Multi-pathing (ECMP) so that load balancing over multiple links can be used.

   Show answer

   Answer: AD

   Explanation

   provided answer is correct. VXLAN is a MAC in IP/UDP(MAC-in-UDP) encapsulation technique with a 24-bit segment identifier in the form of a VXLAN ID. The larger VXLAN ID allows LAN segments to scale to 16 million in a cloud network. In addition, the IP/UDP encapsulation allows each LAN segment to be extended across existing Layer 3 networks making use of Layer 3 equal-cost multipath (ECMP). reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/vxlan/configuration/guide/b_NX-OS_VXLAN_Configuration_Guide/overview.pdf

   Source: Adapted from community discussion — Darude

   References

   • Cisco documentation
   • Cisco documentation

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5. Question 635 · 1003 in bank

   Which component of TCP defines the maximum packet size that a host interface is able to accept on ingress?

   • AMTU
   • BPATH MTU
   • CWindow size
   • DMRU

   Show answer

   Answer: D

   Explanation

   A maximum transmission unit (MTU) is the largest length of a packet that can be transmitted out of an interface toward a destination. maximum receive unit (MRU) is the largest packet size that an interface can receive, so it's an ingress interface parameter. https://www.networkers-online.com/p/understand-mtu-and-mru-the-full-story

   Source: Adapted from community discussion — iGlitch

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6. Question 636 · 1003 in bank

   Select 3

   Which of the following are examples of Type 2 hypervisors? (Choose three.)

   • AVMware ESXi
   • BOracle VirtualBox
   • COracle Solaris Zones
   • DMicrosoft Hyper-V
   • EMicrosoft Virtual PC

   Show answer

   Answer: BCE

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7. Question 637 · 1003 in bank

   Select 3

   EIRP (Effective Isotropic Radiated Power) is the actual amount of signal leaving the antenna. It is a measurement value in db and is based on which three components? (Choose three.)

   • ATransmit Power
   • BRSSI
   • CCable Loss
   • DAntenna Gain
   • ESNR

   Show answer

   Answer: ACD

   Explanation

   provided answer is correct. The radiated (transmitted) power is rated in either dBm or W. Power that comes off an antenna is measured as effective isotropic radiated power (EIRP). EIRP is the value that regulatory agencies, such as the FCC or European Telecommunications Standards Institute (ETSI), use to determine and measure power limits in applications such as 2.4-GHz or 5-GHz wireless equipment. In order to calculate EIRP, add the transmitter power (in dBm) to the antenna gain (in dBi) and subtract any cable losses (in dB). reference: https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/23231-powervalues-23231.html

   Source: Adapted from community discussion — Darude

   References

   • cisco.com documentation
   • Cisco documentation

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8. Question 638 · 1003 in bank

   Refer to the exhibit.

   

   Assuming that R1 is a CE router, which VRF is assigned to Gi0/0 on R1?

   • Adefault VRF
   • BVRF VPN_A
   • CVRF VPN_B
   • Dmanagement VRF

   Show answer

   Answer: A

   Explanation

   i understand the question as this. R1 is a CE and therefore R3 must be a CE too. The only one that a CE connects to is a PE Router which is R2. Since we talk about VPN in sense of just simply two different routing tables without affecting or seeing eachother (VRF) should be configured. That being said, neither CE needs to do any routing table partitioning as they are simply talking to their PE router. the PE router R2 is the one needing to have separate VRF instances or so called VPNs etc. therefore DEFAULT VRF on CE always and VRF separation on PE. thanks for reading this far

   Source: Adapted from community discussion — XalaGyan

   References

   • Cisco documentation

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9. Question 639 · 1003 in bank

   A switch is attached to router R1 on its gig 0/0 interface. Fort security reasons, you want to prevent R1 from sending OSPF hellos to the switch. Which command should be enabled to accomplish this?

   • AR1(config-router)#ip ospf hello disable
   • BR1(config-router)#ip ospf hello-interval 0
   • CR1(config)#passive-interface Gig 0/0
   • DR1(config-router)#passive-interface Gig 0/0

   Show answer

   Answer: D

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10. Question 640 · 1003 in bank

    Select 2

    What are some of the key differences between HSRPv1 and HSRPv2? (Choose two.)

    • AHSRPv1 uses the multicast address of 224.0.0.102 while HSRPv2 uses 225.0.0.2.
    • BHSRP uses a group range of 0-255, while HSRP uses a group range of 0-4095.
    • CHSRPv1 uses seconds based timers, while HSRPv2 uses milliseconds based timers.
    • DHSRPv1 provides support for IPv6, while HSRPv2 supports IPv4 only.

    Show answer

    Answer: BC

    References

    • cisco.com documentation

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350-401 practice, question 631. 1003 questions available.