CompTIA Security+ All-in-One Exam Guide (Exam SY0-301), 3rd Edition, 3rd Edition

Protocols

When two people communicate, several things must happen for the communication to be effective: They must use a language that both parties understand, and they must correctly use the language—that is, structure and syntax—to express their thoughts. The mode of communication is a separate entity entirely, for the previous statements are important in both spoken and written forms of communication. The same requirements are present with respect to computer communications and they are addressed through protocols. Protocols refer to agreed-upon sets of rules that allow different vendors to produce hardware and software that can interoperate with hardware and software developed by other vendors. Because of the worldwide nature of the Internet, ...