What devices transmit on pins 1 and 2?

When considering what devices transmit on pins 1 and 2 in a typical Ethernet configuration, it's essential to focus on devices that are involved in data transmission over twisted-pair cabling, specifically in the context of the Ethernet standard.

Network Interface Cards (NICs), Routers, and Access Points (APs) are all integral components in a networking environment that utilize pins 1 and 2 to send and receive data. Pins 1 and 2 are primarily used for transmitting data in a standard Ethernet connection, which operates over twisted-pair cables (such as Category 5e or Category 6).

NICs serve as the interface for computers to connect to a network, facilitating communication using these pins. Routers, which route data between different networks, also utilize these pins for their Ethernet interfaces when sending outbound data. Access Points are critical in wireless networks, providing connectivity for wireless clients to the wired network and utilizing pins 1 and 2 for Ethernet backhaul connections.

Overall, the correct answer reflects the devices that are equipped to actively transmit data on those specific pins, emphasizing their role in data communications within a network.