Apple Intros Quad-core i5, i7 iMacs 

Apple released updated iMac models sporting quad-core Intel i5 and i7 processors Tuesday morning. Dual-core i3 and i5 models are also available, and the new iMac is available with 21.5-inch and now 27-inch LED backlit displays, too.
"The updated iMac ships with 4GB RAM, a slot loading double-layer 8x SuperDrive, Mini DisplayPort for audio and video out, 802.11n AirPort Extreme wireless networking, Bluetooth 2.1 EDR, Gigabit Ethernet, four USB 2.0 ports and one FireWire 800 port, a built-in iSight video camera, built-in stereo speakers and microphone, and SDXC SD card slot, and Apple’s Wireless Keyboard and Magic Mouse."

Apple Quad-core 27-inch iMac

iMac i7 Quad-core

40 Gigabit Ethernet data center switches, a Layer 2 comeback

40 Gigabit Ethernet in the data center: Virtualization will drive innovation in the data center, and vendors will offer enterprise customers 40 Gigabit Ethernet. "[Virtualization] really hasn't impacted the network yet, but it's starting to," Kerravala said. "It'll push along 10 [Gigabit Ethernet adoption] and I think we'll see 40 [Gigabit Ethernet] products next year."

Diving back into Layer 2: Most enterprises are using native Ethernet, but Kerravala said virtualization will spur a return to TCP/IP. "From a virtualization standpoint, it's faster to do things at Layer 2," he said. "I think you'll see vendors spend a lot of time marketing TCP/IP as the primary protocol…. In some ways, it's 'Back to the Future.'"

WAN optimization: Layers 4 through 7 will also gain continued attention for wide-area network optimization products, Kerravala said, with F5 Networks and Riverbed as the market leaders. "The more reliant companies become on their network," he said, "the more important it is the networks be able to handle the different types of applications."