Which technology on a switch can increase link speed?

LACP, or Link Aggregation Control Protocol, is a technology used to combine multiple physical network links into a single logical link, which effectively increases the overall bandwidth and improves redundancy. When multiple links are aggregated, they work together to distribute traffic across all the links, leading to enhanced throughput. This is particularly beneficial in scenarios where high data transfer rates are required, such as in data centers or high-performance computing environments.

By utilizing LACP, switches can dynamically manage the links and ensure optimal distribution of traffic, maintaining the efficiency of network operations. This helps in load balancing and avoids bottleneck scenarios that could arise if only a single link were used.

In contrast, the other technologies listed serve different purposes. LDAP (Lightweight Directory Access Protocol) is primarily used for directory services and does not impact link speeds. VLAN (Virtual Local Area Network) is employed to segment networks at the data link layer but does not increase link speed. VXLAN (Virtual Extensible LAN) provides a way to encapsulate Layer 2 traffic over Layer 3 networks, which is useful for large-scale cloud environments but also does not inherently increase the speed of the physical links themselves.