This infographic from Symantec discusses web and email security and the options available. You can choose between an on premises solutions or a cloud solution. It discusses how cloud-based security works, the merits and flexibility and cost of ownership as well as some cautions.
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Irma Wallace
Co-founder and Vice President of SearchRank, responsible for many of the day to day operations of the company. She is also founder of The Arizona Builders' Zone, a construction / home improvement portal.