多项选择题

When you are troubleshooting duplex mismatches， which two errors are typically seen on the full- duplexend？（）

A.runts
B.FCS errors
C.interface resets
D.late collisions

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单项选择题

Which command is used to enable EtherChannel hashing for Layer 3 IP and Layer 4 port-based CEF？（）

A.mpls ip cef
B.port-channel ip cef
C.mpls ip port-channel cef
D.port-channel load balance
E.mpls ip load-balance
F.ip cef EtherChannel channel-id XOR L4
G.ip cef connection exchange

单项选择题

Refer to the exhibit. In the diagram， the switches are running IEEE 802.1s MST. Which ports are in the MST blocking state？（）

A. GE-1/2 and GE 2/1
B. GE-1/1 and GE-2/2
C. GE-3/2 and GE 4/1
D. no ports are in the blocking state
E. There is not enough information to determine which ports are in the blocking state.

单项选择题

Which statement is true about TCN propagation？（）

A.The originator of the TCN immediately floods this information through the network.
B.The TCN propagation is a two step process.
C.A TCN is generated and sent to the root bridge.
D.The root bridge must flood this information throughout the network.