Which of the following LAN technologies is used to provide a MAXIMUM bandwidth of 1Gbps through singlemode fiber?

Which of the following LAN technologies is used to provide a MAXIMUM bandwidth of 1Gbps
through singlemode fiber?

A.
10GBaseLR

B.
100BaseFX

C.
100BaseTX

D.
1000BaseX

Explanation:
1000BaseX identifies various Gigabit Ethernet physical layer standards as defined in IEEE802.3z,
such as 1000BaseLX, 1000BaseSX, 1000BaseCX and 1000BaseLH. Basically, all standards
included in 1000BaseX uses 8B/10B coding scheme with 8 bits of data and 2 bits of errorcorrection data. Each specification allows various cable (fiber or copper) lengths, and uses

different cable media.