CompTIA Network+ Question C-28

A administrator’s network has OSPF for the internal routing protocol and has two interfaces that continue to flap. The administrator reviews the following output:
Fast ethernet 0 is up, line protocol is up
Int ip address is
MTU 1500 bytes, BW10000 kbit, DLY 100 usec Reliability 255/255, Tx load 1/255, Rx load 1/255 Encapsulation ospf, loopback not set
Keep alive 10
Full duplex, 100Mb/s, 100Base Tx/Fx Received 1052993 broadcasts
1258 input errors
983881 packet output, 768588 bytes
1747 output errors, 0 collisions, 423 resets

Which of the following problems would cause the interface flap?

A. Wrong IP address
B. Loopback not set
C. Bad wire
D. Incorrect encapsulation
E. Duplex mismatch

Correct Answer: E