Failure Detection and Redundancy Protocols JN0-352 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   In VRRP, what is the role of the virtual IP address?

   • AIt is the physical IP address of the master router
   • BIt is used as the default gateway by hosts on the LAN
   • CIt is used only for communication between VRRP routers
   • DIt is the IP address of the backup router
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2. 2foundation · easy

   How does BFD accelerate convergence for OSPF?

   • ABy detecting a failure faster than OSPF's hello/dead timers and notifying OSPF
   • BBy automatically rerouting traffic around the failed link
   • CBy reducing the OSPF hello and dead timers
   • DBy providing a backup path for OSPF routes
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4. 3application · medium

   You are configuring BFD on a Junos router for a critical link. The link is stable, but you want to detect failures as quickly as possible while avoiding false positives due to occasional micro-bursts. You set the minimum interval to 100 ms. What multiplier should you configure to achieve a detection time of approximately 300 ms?

   • A1
   • B2
   • C3
   • D4
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5. 4application · medium

   Your network uses OSPF as the IGP. The current OSPF hello/dead timers provide failure detection in about 40 seconds, which is too slow for your VoIP traffic. You want to reduce failover time to under one second without changing the OSPF timer configuration. What should you do?

   • AEnable BFD on the OSPF interfaces and configure BFD detection intervals.
   • BIncrease the OSPF dead interval to allow more time for detection.
   • CEnable graceful restart on all OSPF routers.
   • DReduce the OSPF hello interval to 1 second and the dead interval to 3 seconds.
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6. 5foundation · easy

   In Junos BFD configuration, what does the 'multiplier' option control?

   • AThe number of BFD control packets sent per second
   • BThe number of times BFD will retry to establish a session before giving up
   • CThe number of consecutive missed BFD control packets that trigger a session failure
   • DThe number of BFD sessions that can be established on an interface
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