Download CCIE Routing and Switching Written Exam v5-1.passguide.400-101.2018-11-19.1e.326q.vcex

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Exam CCIE Routing and Switching Written Exam v5.1
Number 400-101
File Name CCIE Routing and Switching Written Exam v5-1.passguide.400-101.2018-11-19.1e.326q.vcex
Size 9.44 Mb
Posted November 19, 2018
Downloads 105

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Demo Questions

Question 1
SPANTREE-2-LOOPGUARDBLOCK: No BPDUs were received on port FastEtherner 0/1
In VLAN 10. Moved to loop-inconsistent state. 
Refer to the exhibit. While troubleshooting an issue with a blocked switch port, you find this error in the switch log. Which action should you take first to locate the problem?

  • A: Check the attached switch for an interface configuration issue.
  • B: Check the attached switch for a BPDU filter
  • C: Execute the show interface command to check FastEthernet 0/1.
  • D: Test the link for unidirectional failures.
Correct Answer: B



Question 2
Which two statements about the STP dispute function are true? (Choose two)

  • A: It compares the downstream port states reported in received BPDUs.
  • B: The upstream switch uses received BPDUs to detect unidirectional link failures.
  • C: The downstream switch uses received BPDUs to detect unidirectional link failures.
  • D: When a designated port detects a conflict, it changes its role by reverting to a discarding state.
Correct Answer: AB
STPDispute 
Cisco switches has long time been implementing LoopGuard feature that allows for blocking the non-designated port when it loses the flow of STP BPDUs. This is helpful for detecting unidirectional link (normally on fiber optical links) and preventing Layer 2 loops that could go undetected by STP. Cisco’s implementation of MSTP allows for detecting unidirection condition, by comparing the downstream port state reported in BPDUs. If the upstream switch sends superior root bridge information to the downstream bridge but receives the BPDUs with Designated bit set, the upstream switch concludes that the downstream does not hear its BPDU’s. The upstream switch then blocks the downstream port and marks it as STP dispute link. 



Question 3
Which statement is true about LLDP?

  • A: LLDP can indicate only the duplex setting of a link, and not the speed capabilities.
  • B: LLDP does not use a multicast address to communicate.
  • C: LLDP provides VTP support.
  • D: LLDP does not support native VLAN indication.
Correct Answer: D



Question 4
Which two statements about IS-IS metrics are true? (Choose two.)

  • A: The default metric style is narrow.
  • B: The default metric for the IS-IS interface is 64.
  • C: The default metric for the IS-IS interface is 63.
  • D: The default metric style is wide.
  • E: The default metric for the IS-IS interface is 10.
Correct Answer: AE



Question 5
What are two of the commands that you can enter to gracefully shut down OSPF and notify neighbors? (Choose two.)

  • A: router(config-if)#ip ospf shutdown
  • B: router(config-router)#graceful shutdown
  • C: router(config)#ip notify
  • D: router(config-if)#ip ospfgraceful shutdown
  • E: router(config-router)#shutdown
Correct Answer: AE



Question 6
Which two statements about OSPF route filtering are true? (Choose two)

  • A: It can be based on the source router ID.
  • B: It can be based on the external route tag.
  • C: It affects LSA flooding.
  • D: It can be based on the as-path.
  • E: It can be based on distance.
Correct Answer: AB



Question 7
Which three parameters must match to establish OSPF neighbor adjacency? (Choose three.)

  • A: the process ID
  • B: the hello interval
  • C: the subnet mask
  • D: authentication
  • E: the router ID
  • F: the OSPF interface priority
Correct Answer: BCD



Question 8
Which statement about route summarization is true?

  • A: EIGRP and RIPv2 route summarization are configured with the ip summary-address command under the route process.
  • B: It can be disabled in RIP, RIPv2, and EIGRP.
  • C: RIPv2 can summarize routes beyond the classful network boundary.
  • D: EIGRP can summarize routes at the classful network boundary.
Correct Answer: D



Question 9
Refer to the exhibit. 
  
  

The OSPF adjacency between two routers cannot be established. What is the root cause of the problem?

  • A: Both routers are designated routers.
  • B: different area ID
  • C: mismatched OSPF network types
  • D: authentication error
  • E: area type mismatch
Correct Answer: E



Question 10
entry1: AS (PATH) 400, med 150, external, rid 2.2.2.2
entry2: AS (PATH) 100, med 200, external, rid 1.1.1.1
entry3: AS (PATH) 400, med 100, external, rid 3.3.3.3
Refer to the exhibit. With BGP always-compare-med enabled, which BGP entry is installed in the RIB?

  • A: Entry 3 because it has the lowest MED.
  • B: Entry 2 because it has the lowest router ID.
  • C: Entry 1 because it has the best MED of the external routes.
  • D: Entry 1 because it was installed first (oldest) in the BGP table.
Correct Answer: A
References:






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