In the networking case, Ethernet is less expensive than competing technologies such as Infiniband and even Fibre Channel.

FORBES: Dell Goes After The Enterprise With Beefier Networking

In a traditional data center, data storage devices and servers have been connected via Fibre Channel and Infiniband cables that can only move data over short distances.

FORBES: Cisco's Big Switch

It chose Ethernet over Infiniband for reliablity and operational reasons.

FORBES: CBOE Speeds up Network With Arista, Solarflare and 10-Gig Ethernet