Hewlett Packard Enterprise said in a statement on Tuesday that it plans to buy data center networking hardware maker Juniper Networks for about $14 billion, or $40 per share, in an all-cash deal.The announcement came a day after the Wall Street Journal reported on HPE's interest in buying Juniper. Juniper shares had their best day in 20 years on Tuesday after the Wall Street Journal report, which said a deal could be announced this week. The shares jumped 22% to close at $37.05.HPE said the deal would be ac ...