Exam 200-301 topic 1 question 102 discussion

1000BASE-LX: Used for Gigabit Ethernet over optical fiber Supports distances up to 10 km Uses a single-mode fiber (SMF) 1000BASE-T: Used for Gigabit Ethernet over copper cable Supports distances up to 100 meters Uses 4 pairs of copper wires Supports speeds up to 1000 Mbps (1 Gbps)

"In computer networking, Gigabit Ethernet (GbE or 1 GigE) is the term applied to transmitting Ethernet frames at a rate of a gigabit per second." Both standards use Ethernet framing (same headers and trailers)

Correct answer is A Since both 1000BASE-LX and 1000BASE-T use the Ethernet data-link layer protocol, and the header and trailer formats are standardized by IEEE 802.3, ensuring consistency and interoperability within Ethernet networks.

The correct answer is B. Both cable types support RJ-45 connectors. 1000BASE-LX and 1000BASE-T are both Ethernet standards, but they use different physical media and have different characteristics. 1000BASE-LX typically uses single-mode or multi-mode fiber optic cables and supports longer distances, while 1000BASE-T uses twisted-pair copper cables (usually Cat 5e or Cat 6) and supports shorter distances. However, both standards use the same RJ-45 connectors for network connections, which is a common similarity between them. 1000BASE-LX and 1000BASE-T standards do not use the same data-link header and trailer formats. 1000BASE-LX is a standard for Gigabit Ethernet over fiber optics, and it uses a different encoding and modulation scheme compared to 1000BASE-T, which is designed for Gigabit Ethernet over twisted-pair copper cables. The data-link header and trailer formats may differ between these two standards due to the variations in the physical layer and transmission methods. So, the correct similarity between these two standards is B, as they both use RJ-45 connectors for network connections.

A is fine.