Refer to the exhibit.
Switch-1 and Switch-2 connect on interface A23. The switches experience a connectivity issue. The network administrator sees that both switches show this interface as up. The administrator sees the output shown in the exhibit on Switch-1.
What is a typical issue that could cause this output?
A. asymmetric routing introduced by a routing protocol
B. an issue with VLAN mismatch
C. mismatched subnet mask on the VLAN for the link
D. a jumbo frame mismatch
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I think it is B. UDLD works at Layer 2