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Cisco 351-001 Exam
CCIE Routing and Switching v4.0 Written Beta (Page 7 )

Updated On: 1-Feb-2026
Page 7 of 49
PDF with 234 Questions

WRED is short for Weighted Random Early Detection. Which two descriptions are correct concerning WRED? (Choose two.)

  1. WRED throttles TCP-based applications to avoid congestion within the queue servicing the traffic.
  2. WRED provides bandwidth guarantees for packets within a queue, and tells the scheduler the order in which queues should be served.
  3. WRED allows thresholds to be applied to give higher priority applications access to limited buffer resources.
  4. WRED can inform remote devices that there is congestion on the network by setting the pause bit within the ToS field, instructing end devices to throttle their transmissions.

Answer(s): A,C



Which three reasons are to summarize link state topology information? (Choose three.)

  1. To create boundaries for containing potential network changes and instabilities
  2. To permit traffic engineering between areas
  3. To reduce the amount of routing information being advertised
  4. To hide detailed topology information

Answer(s): A,C,D



Which description is correct about how MTU mismatches are addressed in the IS-IS neighbor- formation process?

  1. IS-IS does not check for MTU mismatches when forming a neighbor relationship.
  2. IS-IS checks the locally configured MTU against the MTU advertised in neighbor hello packets.
  3. IS-IS checks the locally configured MTU against the MTU advertised in neighbor LSPs.
  4. IS-IS pads hellos, so neighbor relationships will not be formed on links with mismatched MTUs.

Answer(s): D



The boss of the P4S company plans to dual-home two service providers for Internet connectivity. The full Internet routing table will be accepted from each provider to provide optimal outbound routing. P4S has obtained address space and an AS to use in connecting to the Internet. Which mechanism is the simplest one that P4S can use to prevent it from becoming a transit between the two service providers?

  1. Build a route filter that only allows networks which are tagged with the LOCAL community to be advertised to each of the service providers.
  2. Build a route filter that only allows the specific networks the enterprise owns to be advertised to each of the service providers.
  3. Build a route filter that only allows networks with an empty AS path to be advertised to each of the service providers.
  4. Build a traffic filter that only allows traffic originating from the specific networks the enterprise owns to be forwarded towards the service providers.

Answer(s): C



Which two of the following Cisco router platforms support Multicast Distributed Fast Switching? (Choose two.)

  1. 3600 series
  2. 7200 series with NSE-1
  3. 7500 series
  4. 12000 series

Answer(s): C,D



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