300-415 practice questions 91–100

1. Question 91 · 382 in bank

   How many subnets are necessary in Azure VNet for a WAN Edge device to function in the cloud deployment?

   • ACSR is the WAN Edge device that is supported in the Microsoft cloud. The Microsoft underlay cloud fabric performs the management function.
   • BThere must be three subnets in VNet: management, public, and services.
   • COne public subnet is required in VNet. The Microsoft underlay cloud fabric performs all of the routing functions for WAN Edge.
   • DPublic and services subnets are required in VNet. The Microsoft underlay cloud fabric performs the management function.

   Show answer

   Answer: D

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2. Question 92 · 382 in bank

   Select 2

   Which two sets of identifiers does OMP carry when it advertises TLOC routes between WAN Edge routers? (Choose two.)

   • ATLOC public and private address, carrier, and preference
   • Bsource and destination IP address, MAC, and site ID
   • Csystem IP address, link color, and encapsulation
   • DVPN ID, local site network, and BGP next-hop IP address
   • ETLOC public and private address, tunnel ID, and performance

   Show answer

   Answer: AC

   Explanation

   According to the Cisco White Paper the identifiers that OMP carry when advertising TLOC routes to WAN Edge devices are:- System IP address of the OMP speaker that originates the OMP route Color to identify the link type Encapsulation type on the transport tunnel Origin—(Source of the route, such as BGP, OSPF, connected, and static, and the metric associated with the original route). Originator— (OMP identifier of the originator of the route, which is the IP address from which the route was learned). Preference—(Degree of preference for an OMP route. A higher preference value is more preferred). Service—(Network service associated with the OMP route). Site ID— (Identifier of a site within the Cisco SD-WAN overlay network domain to which the OMP route belongs). Option A and C Reference:- https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/routing/vEdge-20-x/routing-book/m-unicast-routing.html

   Source: Adapted from community discussion — NetArch_Teck

   References

   • Cisco documentation

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3. Question 93 · 382 in bank

   Select 2

   Which two hardware platforms support Cisco IOS XE SD-WAN images? (Choose two.)

   • AISR4000 series
   • BISR9300 series
   • CvEdge-1000 series
   • DASR9000 series
   • EASR1000 series

   Show answer

   Answer: AE

   Explanation

   This question is asking which IOS XE SD-WAN images are supported, so it should fall into one of the following categories: 1. ISR/ASR/C8000/IR 2. ENCS 3. vEdge Cloud & CSR 1000v vEdge-1000 (or similar) is running Viptela OS

   Source: Adapted from community discussion — winder

   References

   • Cisco documentation

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4. Question 94 · 382 in bank

   For data plane resiliency, what does the Cisco SD-WAN software implement?

   • Amultiple vBond orchestrators
   • Bestablishing affinity between vSmart controllers and WAN Edge routers
   • COMP
   • DBFD

   Show answer

   Answer: D

   Explanation

   For data plane resiliency, the Cisco SD-WAN software implements standard protocol mechanisms, specifically Bidirectional Forwarding Detection (BFD), which runs on the secure IPsec tunnels between routers. Source: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/optimization-ha/vedge/network-optimization-high-availability-book/high-availability.html

   Source: Adapted from community discussion — Ben_001

   References

   • Cisco documentation

   Next question

5. Question 95 · 382 in bank

   

   Refer to the exhibit. vManage and vBond have an issue establishing a connection to each other. Which configuration resolves the issue?

   

   • AConfigure the timezone on vBond to Europe/London.
   • BConfigure the encapsulation ipsec command under the tunnel interface on vManage.
   • CConfigure a default route on vBond pointing to 172.16.2.254.
   • DRemove the encapsulation ipsec command under the tunnel interface of vBond.

   Show answer

   Answer: C

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6. Question 96 · 382 in bank

   Which policy tracks path characteristics such as loss, latency, and jitter in vManage?

   • AVPN
   • Bcontrol
   • Capp-route
   • Ddata

   Show answer

   Answer: C

   References

   • Cisco documentation

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7. Question 97 · 382 in bank

   

   Refer to the exhibit. An engineer configured OMP with an overlay-as of 10666. What is the AS-PATH for prefix 104.104.104.104/32 on R100?

   • A100 10666
   • B100 20 104
   • C100 10666 20 104
   • D100 10666 104

   Show answer

   Answer: D

   Explanation

   is D: https://www.cisco.com/c/en/us/support/docs/routers/sd-wan/214147-vedge-does-not-advertise-its-own-as-when.html "This document describes why vEdge router does not advertise its own Autonomous System (AS) number when you advertise Border Gateway Protocol (BGP) routes into Overlay Management Protocol (OMP)."

   Source: Adapted from community discussion — Zdrobici

   References

   • Cisco documentation
   • cisco.com documentation
   • Cisco documentation

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8. Question 98 · 382 in bank

   Which table is used by the vSmart controller to maintain service routes of the WAN Edge routers in the hub and local branches?

   • ARIB
   • BFIB
   • COMP
   • DTLOC

   Show answer

   Answer: A

   Explanation

   A is correct. In the context of managing and maintaining routes for WAN edge devices in a software-defined network, such as Cisco SD-WAN, the vSmart controller utilizes the Routing Information Base (RIB). The RIB is where routing information, including service routes, is stored and managed, and it's overseen by the vSmart controller.

   Source: Adapted from community discussion — GlobalK

   References

   • Cisco documentation

   Next question

9. Question 99 · 382 in bank

   Which protocol is configured on tunnels by default to detect loss, latency, jitter, and path failures in Cisco SD-WAN?

   • ATLS
   • BBFD
   • COMP
   • DBGP

   Show answer

   Answer: B

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10. Question 100 · 382 in bank

    

    Refer to the exhibit. Which configuration configures IPsec tunnels in active and standby?

    • Avpn 1 service netsvc1 interface ipsec1 ipsec2 from-vsmart lists vpn-list 1 vpn 1
    • Bvpn 0 service netsvc1 interface ipsec1 ipsec2 from-vsmart lists vpn-list 0 vpn 0
    • Cvpn 1 service netsvc1 interface ipsec1 ipsec2 vpn-list 1 count ServicePSec1_275676046 from-vsmart lists vpn-list 1 vpn 1
    • Dvpn 0 service netsvc1 interface ipsec1 ipsec2 vpn-list 1 count ServicePSec1_275676046 from-vsmart lists vpn-list 0 vpn 0

    Show answer

    Answer: A

    Explanation

    A looks much better, why would we use a counter under vpn-list definition? A with a little bit of formating: vpn 1 service netsvc1 interface ipsec1 ipsec2 from-vsmart lists vpn-list 1 vpn 1

    Source: Adapted from community discussion — DBla

    References

    • Cisco documentation
    • Cisco documentation

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300-415 practice, question 91. 382 questions available.