Which large transceiver is used for Gigabit media, also associated with GBIC?

• A. Transceiver GigaBit Interface Converter (GBIC)
• B. Transceiver Quad (SFP) or QSFP
• C. Transceiver XFP
• D. Transceiver Small Form-factor Pluggable (SFP)

Answer: (A)

GBIC stands for GigaBit Interface Converter, and it refers to the large, hot-swappable transceiver used to provide 1 Gbps Ethernet connections over fiber (and sometimes copper). This module is the classic, bigger form factor that many early switches and routers used for Gigabit media. The reason this is the best choice here is that the question points to a large transceiver associated with Gigabit Ethernet, and GBIC is the original, large form-factor solution for that speed.

The other options correspond to smaller or higher-speed modules. SFP is the compact form factor commonly used for Gigabit as well, but it’s smaller than GBIC. XFP and QSFP/SFP variants are designed for different contexts or higher speeds (10G and beyond), not the classic large GBIC used for Gigabit media.