An engineer uses fiber optic cable for a run within a building to a centralized fiber distribution panel in a network closet. Which type of transceiver does the engineer use to achieve 40 GbE speed?

The use of a QSFP (Quad Small Form-factor Pluggable) transceiver is appropriate for achieving 40 GbE (Gigabit Ethernet) speeds, as it is specifically designed to support high throughput. The QSFP transceiver can include multiple communication channels within a single module, allowing for a total capacity of 40 Gbps by utilizing four 10 Gbps lanes. This makes it an ideal choice for applications that require high bandwidth and performance, particularly in a fiber optic environment where speed and the ability to transmit large amounts of data over long distances are crucial.

The design of the QSFP also allows for greater flexibility in data center infrastructure, supporting various network topologies and enabling easy upgrades when necessary. This capacity to handle high-speed connections is vital in modern networking scenarios, especially within environments that demand robust and fast data transmission capabilities. Thus, the QSFP is the right choice for achieving the desired network performance in this context.