LACP is defined under which IEEE standard?

LACP, or Link Aggregation Control Protocol, is defined under the IEEE 802.3ad standard. This protocol is used to combine multiple physical links into a single logical link for increased bandwidth and redundancy. By using LACP, a network device can automatically detect and manage the aggregation of links, ensuring that they work together efficiently without manual configuration of each link.

The IEEE 802.3ad standard specifically addresses link aggregation and provides guidelines that help devices negotiate automatic link configuration at startup. This is particularly valuable in environments where redundancy and performance are critical, such as in enterprise networks that require reliable connections between switches and servers.

The other standards listed do not pertain to LACP; instead, they cover different networking technologies. For instance, 802.3ae relates to 10 Gigabit Ethernet, 802.11n pertains to wireless networking, and 802.1X is a standard for network access control. Understanding the function and application of these standards is crucial for recognizing how LACP fits into network design and management scenarios.