640-875 Exam Questions - Online Test

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Q41. Which statement about STP operations is true? 

A. One root bridge exists per collision domain. 

B. One root port is established per root bridge. 

C. One designated port is defined per segment. 

D. Non-designated ports are set in the forwarding state. 

E. One root port exists per broadcast domain. 

Answer: C 

Explanation: 

Q42. Which pair of mechanisms are often used together to allow dynamic routing over a secured site-to-site VPN tunnel? 

A. GRE + SSL 

B. VTI + SSL 

C. VRF + SSL 

D. GRE + IPsec 

E. L2TP + IPsec 

F. VRF + IPsec 

Answer: D 

Explanation: 

Q43. Which Cisco IOS XR command presents a list of all interfaces, their Layer 3 address (if configured), and the status of the interface and protocol? 

A. RP/0/RSP0/CPU0:PE1# show interface GigabitEthernet 0/0/0/1 

B. RP/0/RSP0/CPU0:PE1# show controllers 

C. RP/0/RSP0/CPU0:PE1(admin)# show hw-module fpd location all 

D. RP/0/RSP0/CPU0:PE1(config)# show bundle 

E. RP/0/RSP0/CPU0:PE1(admin)# show platform 

F. RP/0/RSP0/CPU0:PE1# show ipv4 interfaces brief 

Answer: F 

Explanation: 

Q44. Which SNMPv2/SNMPv3 operation is not supported in Cisco IOS XR software? 

A. get-bulk 

B. get-request 

C. inform 

D. trap 

E. set-request 

Answer: C 

Explanation: 

Q45. Which Cisco IOS CLI command is used to verify the speed and duplex settings on the Fa0/1 port on a Cisco switch? 

A. show ip interfaces fa0/1 

B. show interfaces fa0/1 

C. show interfaces fa0/1 switchport 

D. show ip interfaces brief 

E. show interfaces switchport 

Answer: B 

Explanation: 

Q46. Using VLSM, how many /30 subnets can be derived from a single /27 Class C subnet? 

A. 1 

B. 2 

C. 4 

D. 8 

E. 12 F. 16 

Answer: D 

Explanation: