Which standard below does NOT specify fiber optic cabling as its
physical media?

A.
1000BaseSX

B.
100BaseFX

C.
1000BaseCX

D.
1000BaseLX

Explanation:
1000BaseCX refers to 1000Mbps baseband copper cable, using two
pairs of 150 ohm balanced cable for CSMA/CD LANs.
* 100BaseFX, specifies a 100 Mbps baseband fiber optic CSMA/CD
LAN. Answer c, 1000BaseLX, specifies a 1000Mbps CSMA/CD LAN
over long wavelength fiber optics.

* 1000BaseSX, specifies a 1000Mbps CSMA/CD LAN over short wavelength fiber optics.