Global Knowledge just released the list of the 15 most popular IT and business certifications for this year. See their list below. By: John Hales, Global Knowledge VMware instructor, A+, Network+, CTT+, MCSE, MCDBA, MOUS, MCT, VCP, VCAP, VCI, EMCSA   Introduction We learn a lot from our annual IT Skills and Salary Survey-the top-paying ...