Dell Networking is the (new) name for the networking portfolio of Dell computers. In the first half of 2013 Dell started to re-brand their different existing networking product brands to Dell Networking. Dell Networking will be the new name for the networking-equipment that was known as Dell PowerConnect as well as the Force10 portfolio.
Dell used to be mainly a so-called box-shifter: they produced computers which could (only) be bought directly from Dell, but they didn't offer complete solutions. With the acquisition of Perot Systems Dell entered the market for the -more profitable- services market and also expanded on the software and system-management-market by buying KACE Networks,Quest Software, AppAssure and Credant Technologies. Other notable acquisitions include storage systems like EqualLogic, thin-client producer Wyse and firewall/security producer SonicWall.
In 2011, Dell took over high-end network-equipment producer Force10 Networks that mainly produces multi-layer switches for datacenter environments and with that step Dell entered the market for (enterprise and datacenter class) network equipment. Until then Dell didn't have their own network equipment: the switches that were sold under the brand PowerConnect were products designed and built -for Dell- by 3rd parties such as Broadcom and Marvell Technology Group. And Dell also offered existing products from other suppliers with a 'PowerConnect' sticker on it like the B-series for Brocade (Ethernet) switches or J-series for Juniper switches. But by buying Force10 and later network-security provider SonicWall the company now has its own intellectual property networking systems and stopped selling most J- and B-series switches but continued to offer the legacy PowerConnect products made by Broadcom and Marvell with some overlap in the Force10 products.