As an experienced network engineer, you are asked to troubleshoot a CIS network outage. During the troubleshooting process, you notice that one of your colleagues connects additional devices to the network with the use of his own switch. With the purpose of improving speed, the switch is attached to both network ports in an office, which leads to bridge loop.
Enabling which of the following feature will be able to prevent this problem from happening again?（）
A.GLBP
B.RSTP
C.BPDU guard
D.root guard
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A. Disables the interfaces to prevent traffic flow
B. Clears all the configurations on the interface
C. Switches the port from access mode to trunk mode
D. Converts the port from physical Layer 2 port to physical Layer 3 port
A.9
B.3
C.12
D.6
A. using DHCP snooping
B. snooping the incoming 802.1Q VLAN tag
C. using CDP
D. snooping the CoS marking on the incoming frames
A. Route reflectors are not passing updates properly.
B. BGP synchronization has been enabled.
C. The next-hop address is unreachable.
D. No loopback interface has been configured on a router.
A. debug ip bgp updates
B. debug ip tcp events
C. debug ip bgp transactions
D. debug ip tcp transactions
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