. http://www.catonetworks.com/blog/how-to-migrate-to-a-multi-cloud-deployment/
blog article
HOW TO MIGRATE TO A MULTI-CLOUD DEPLOYMENT
Migrating to the cloud is a significant challenge for most organizations especially when the migration involves multiple datacenters, mobile users and remote locations. Ensuring secure access to cloud assets with legacy networks often leads to two choices — backhauling cloud traffic to a central Internet access point or sending cloud traffic directly onto the Internet.

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