With all the storage information located in one area and accessed by many computing devices, SANs must have high availability and provide reliable, low-latency high-speed transmission. High-density fiber optic cabling infrastructures are therefore the primary media used for establishing redundant connections within a SAN. Connections between servers and SAN switches often use high-speed 40 gigabit QSFP+ or MTP fiber via fiber patching for manageability while storage devices are connected to the SAN switch via 1 or 10 gigabit SFP/SFP+ ports using transceivers or LC or mini LC fiber jumpers.
The primary protocol used for transmitting the data is Fibre Channel, which can operate at various speeds with 8 Gb/s and 16 Gb/s being predominant. Fiber Channel over Ethernet (FCoE) and Small Computer Systems Interface over Internet Protocol (iSCSI) are also becoming popular due to their ability to extend distances via IP-based networking.