Correct Answer: A
PPP (Point-to-Point Protocol) uses a modular architecture consisting of two main components:
* LCP (Link Control Protocol): Establishes, configures, and tests the data-link connection
* NCP (Network Control Protocol): Identifies and configures protocols at the Network Layer (e.g., IP, IPX) NCP allows multiple protocols to be used over the same PPP link by negotiating and identifying the type of Layer 3 protocol.
MTCNA Course Material - PPP Components:
"NCP handles Layer 3 protocol negotiation and support. For example, IPCP (IP Control Protocol) is a type of NCP used for IP." Rene Meneses MTCNA Study Guide - PPP Protocol Stack:
"PPP uses NCP to identify and configure multiple Layer 3 protocols such as IP, IPX, AppleTalk." Other options:
* B: ISDN is a WAN access technology, not part of PPP stack
* C: HDLC is a data-link layer protocol, not used for identifying Layer 3
* D: LCP configures link parameters, not network layer protocols