XLAUI (10 Gigabit Attachment Unit Interface) is a standard developed for high-speed data communication, specifically designed for 10 Gigabit Ethernet applications. It provides a physical interface for connecting optical modules or copper cables to networking equipment, ensuring efficient data transmission over short distances. XLAUI typically supports a data rate of 10 Gbps over multiple lanes, enhancing bandwidth and reducing complexity in network designs. It is commonly used in data centers and high-performance computing environments.