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CHAPTER 5 Ten Key Takeaways 37 These materials are © 2020 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. The Old Way of Networking Is Slow and Expensive Costly MPLS WAN links connecting remote branch locations and backhauling all of their traffic to a corporate headend are ineffi- cient and introduce complexity, performance, and user satisfac- tion issues. Network Architecture Is Meeting New Demands SD-WAN as a standalone networking solution is great for solv- ing enterprise networking challenges, particularly in remote and branch locations. SD-WAN enables organizations to set up new sites quickly, without having to wait weeks or months to provi- sion new MPLS WAN links. Instead, a local Internet service pro- vider (ISP) can provide a DIA link, often within just a couple of days. But agility and simplicity introduce new challenges for enterprise security teams. In the rush to get connected, security may be an afterthought to the business. Once the Internet connection is live, the business is ready to go — with or without security. And if the SD-WAN solution doesn't have built-in security capabilities, the security team may need to ship a separate firewall and/or other security appliances to the remote office. Plugging in one appliance is fine, but two or three – well, that's just asking for too much! Look for a Solution That Reduces Cost and Complexity In the not too distant past, enterprise security teams routinely deployed "best-of-breed" point security solutions from differ- ent vendors to address single purpose needs — firewalls, secure web gateways (SWGs), intrusion detection and intrusion preven- tion systems (IDS and IPS), web content filtering, domain name system (DNS) security, data loss prevention (DLP), distributed