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多选题
What two features in Cisco switches help prevent Layer 2 loops？（）
A
UniDirectional Link Detection
B
Hot Standby Router Protocol
C
Virtual Router Redundancy Protocol
D
PortFast
E
root guard
F
loop guard
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What two features in Cisco switches help prevent Layer 2 loops？（）A、UniDirectional Link DetectionB、Hot Standby Router ProtocolC、Virtual Router Redundancy ProtocolD、PortFastE、root guardF、loop guard
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多选题Cisco Catalyst 4500 Series switches are attractive to medium-size campuses with growth opportunities due to the switches enhanced security and which two other features？ （）Aenhanced multilayer software imageBconnectivity to multiple types of WAN connectionsCCisco Unified Communications ManagerDQoS for converged networksEmodular， customizable components
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单选题To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus？（）A
to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 linkB
to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 linkC
to two core switches from redundant distribution switches connected with Layer 2 linkD
to two core switches from redundant distribution switches connected with Layer 3 linkE
to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO
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多选题Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network?（）A802.1dBVTPC802.1qDSTPESAP
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