Certified Information Systems Security Professional (CISSP) Practice Exam

Point-to-Point Protocol (PPP) is a widely used data link layer protocol that facilitates direct communication between two nodes over a serial link. It is designed to provide a standard method for transporting multi-protocol datagrams over point-to-point links.

PPP supports various network protocols, enabling devices to communicate irrespective of the underlying hardware. It offers features such as error detection, data compression, and the ability to authenticate communication sessions, making it a versatile option for establishing connections over dial-up links as well as direct serial connections.

The other options do not accurately represent a recognized networking term. Private Network Protocol and Public Packet Protocol are not standard terminologies in networking. Point-to-Point Performance does not refer to any established protocol or concept in the field; hence, they do not capture the essence of the commonly accepted definitions and functions associated with PPP.