Refer to the exhibit. A network engineer must design a highly available OSPF solution based on these requirements:
* Traffic disruptions caused by link or node failures in Area-1 must be resolved in milliseconds.
* In the event of a failure, traffic must switch to another path without waiting for the OSPF dead interval.
Which fault detection solution must the engineer choose?

• A.Decrease SPF timers to 100 ms.
• B.Utilize BFD and tune the BFD timers to 100 ms.
• C.Enable IP SLA tracking for each OSPF peer.
• D.Tune the SPF delay and the OSPF LSA interval timers to 100 ms.

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An engineer must peer with an ISP for internet connectivity using BGP, initially, the engineer wants to receive only specific prefixes from the ISP and a default route. However, the solution must provide the flexibility to add prefixes in the future at short notice. The ISP has a two-week change process in place. Which route filtering solution must the engineer employ?

• A.Request a limited internet routing table and a default route from the ISP and configure the BGP max-limit to 1 with an access list that permits only the specific internet prefixes and blocked networks
• B.Request only the required prefixes and default route be advertised from the ISO with whitelisted networks
• C.Request a full internet routing table and a default route from the ISP and configure inbound route filtering with a prefix list that permits the default route and required prefixes
• D.Configure outbound route filtering on the enterprise and ISP so that the enterprise tell the ISP which prefixes are required

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In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?

• A.DHCP options or manual configuration
• B.vManage or DNS records
• C.ZTP or manual configuration
• D.DNS records or DHCP options

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Refer to the exhibit.

An engineer must design a WAN solution so that ISP-1 is always preferred over ISP-2. The path via ISP-2 is considered as a backup and must be used only when the path to ISP-1 is down. Which solution must the engineer choose?

• A.R1:
  - Routes advertised to ISP-1: 0x AS-path prepend
  - Routes received from ISP-1: HIGH local-preference
  - Routes advertised to R2: community NO-EXPORT
  - Routes received from R2: no action
  R2:
  - Routes advertised to ISP-2: 5x AS-path prepend
  - Routes received from ISP-2: LOW local-preference
  - Routes advertised to R1: no action
  - Routes received from R1: no action
• B.R1:
  - Routes advertised to ISP-1: 0x AS-path prepend
  - Routes received from ISP-1: HIGH local-preference
  - Routes advertised to R2: no action
  - Routes received from R2: community NO-EXPORT
  R2:
  - Routes advertised to ISP-2:5x AS-path prepend
  - Routes received from ISP-2: LOW local-preference
  - Routes advertised to R1: community NO-ADVERTISE
  - Routes received from R1: no action
• C.R1:
  - Routes advertised to ISP-1: 0x AS-path prepend
  - Routes received from ISP-1: LOW local-preference
  - Routes advertised to R2: community NO-ADVERTISE
  - Routes received from R2: no action
  R2:
  - Routes advertised to ISP-2: 5x AS-path prepend
  - Routes received from ISP-2: HIGH local-preference
  - Routes advertised to R1: no action
  - Routes received from R1: community NO-ADVERTISE
• D.R1:
  - Routes advertised to ISP-1: 5x AS-path prepend
  - Routes received from ISP-1: LOW local-preference
  - Routes advertised to R2: community NO-ADVERTISE
  - Routes received from R2: no action
  R2:
  - Routes advertised to ISP-2: 0x AS-path prepend
  - Routes received from ISP-2: HIGH local-preference
  - Routes advertised to R1: community NO-EXPORT
  - Routes received from R1: no action

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Refer to the exhibit. All routers currently reside in OSPF area 0. The network manager recently used R1 and R2 as aggregation routers for remote branch locations and R3 and R4 for aggregation routers for remote office locations. The network has since been suffering from outages, which are causing frequent SPF runs. To enhance stability and introduce areas to the OSPF network with the minimal number of ABRs possible, which two solutions should the network manager recommend? (Choose two.)

• A.a new OSPF area for R3 and R4 connections,with R5 and R6as ABRs
• B.a new OSPF area for R1, R2, R3, and R4 connections, with R1, R2, R3, and R4 as ABRs
• C.a new OSPF area for R1 and R2 connections,with R1 and R2as ABRs
• D.a new OSPF area for R3 and R4 connections,with R3 and R4as ABRs
• E.a new OSPF area for R1 and R2 connections, with R5 and R6 as ABRs

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