單項(xiàng)選擇題

You deployed new fibers in your network to replace copper spans that were too long. While reconnecting the network， you experienced network problems because you reconnected wrong fibers to wrong ports. What could you do to prevent this type of problem in the future， particularly when connecting and reconnecting fiber pairs？（）

A. Only use fiber in pairs.
B. Configure root guard on your switches.
C. Do not use fiber but use copper.
D. Configure UDLD to prevent one-way link conditions.

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單項(xiàng)選擇題

Which feature would prevent guest users from gaining network access by unplugging an IP phone andconnecting a laptop computer？（）

A.IPSec VPN
B.SSL VPN
C.port security
D.port security with statically configured MAC addresses
E.private VLANs

多項(xiàng)選擇題

Refer to the exhibit. There are two sites connected across WAN links. All intersite and intrasite links always have the same routing metric. The network administrator sees only the top routers and links being used by hosts at both LAN A and LAN B. What would be two suggestions to load-balance the traffic across both WAN links？（）

A. Make HSRP track interfaces between the edge and core routers.
B. Replace HSRP with GLBP. 用GLBP替換HSRP
C. Add crossed intrasite links： R1-R4， R2-R3， R5-R8， and R6-R7.
D. Make R3 and R8 have lower HSRP priority than R1 and R7.
E. Replace HSRP with VRRP

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Which feature would prevent guest users from gaining network access by unplugging an IP phone andconnecting a laptop computer？（）

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Which feature would prevent guest users from gaining network access by unplugging an IP phone andconnecting a laptop computer？（）