WIRELESS ACCESS POINT - layer 2 device, uses Mac address to route traffic. enables wireless devices to connect to the wired network using radio frequency waves, WIRELESS CONTROLLER - a device that manages and control multiple access points from a central point. you can also deploy security means, load balancing, and network monitoring, CDN [CONTENT DELIVERY NETWORK] - type of server that caches data to speed up the process. efficient way to, VPN - secures data on a public network/connect remotely, QoS - categorizes and prioritizes different types of traffic, TTL - time to live, specifies how long a DNS resolver should cache a query before requesting a new one,

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