Mike Meyers' CompTIA Security+ Certification Guide (Exam SY0-401)

MODULE 27

Internet Service Hardening

Hosts use a variety of applications that must communicate over the network with other hosts and applications on their own network or with Internet-based resources. Some of these applications are user-focused, such as client browsers, and some are applications that network services need in order to service client requests. Network communications between applications take place using protocols. Remember that protocols are simply rules for communications. When an application uses a protocol to communicate with another application, they work together and with other services, such as encryption and authentication services, to ensure that communications sessions between applications on different hosts are functional, ...