Which three statements describe the function of PPP?
a. The authentication phase of a PPP session is required.
b. PPP provides router-to-router and host-to-network connections only over asynchronous circuits.
c. PPP originally emerged as an encapsulation protocol for transporting IP traffic over point-to-point links.
d. PPP established a standard for the management of TCP sessions.
e. PPP provides router-to-router and host-to-network connections over synchronous and asynchronous circuits.
f. The LCP in PPP is used for establishment, configuration, and testing the data-link connection.
C, E, F