This IDC study is a translation of the Japanese document IDC #JPJ41788117. It analyzes the 2016 vendor share and vendor trend for the overall market, Ethernet switch, and application delivery controller (ADC) market with regard to the datacenter network equipment market. The growth of Japan datacenter network equipment market halted briefly in 2015 and the overall market turned negative in 2016 as well. Even under such market conditions, Cisco retained its top spot with a high market share while F5 Networks maintained its position in the ADC market despite the mature market conditions. In the datacenter Ethernet switch segment, Brocade and Arista Networks experienced continued growth and expanded their market share. IDC Japan's Group Manager for Communications, Kenichi Kusano says, "Vendors that lead the market with high share should maintain their competitive edge both in traditional and state-of-the-art datacenter networks. It is essential to maintain a strong customer base even among the majority of customers that do not require state-of-the-art networks by continuing to supply conventional products and technologies."