【71-75】Network security is the protection of the underlying networkinginfrastructur （71） access,misuse,or theft. It involves creating a secureinfrastructure for device and applications to work in a（72）manner.Network security combines multiple defenses at the edge and in thenetwork. Each networksecuritylayer implements （73） controls.Authorized users gain access to network resources. A （74） is a networdevicethat monitors incoming and outgoing network traffic and decideswhetherblock specific trfficbasedona defined set of security rules. Avirtual （75） encrypts the connection from an endpoint to a network,oftenover the internet.remote-aceess VPN uses IPsee or Seeure Soekets Layer to aufhenticate thebetweendeviceand network.
