Cisco Certified Network Associate (CCNA) Practice Exam

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Study for the Cisco Certified Network Associate (CCNA) exam with our comprehensive quiz featuring multiple-choice questions and detailed explanations. Prepare effectively and enhance your understanding of networking concepts!

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What is the function of the PPP Network Control Protocol (NCP)?

It manages the physical connection
It encapsulates network layer protocols
It authenticates devices during a session
It secures the link layer connection

The correct answer is: It encapsulates network layer protocols

The function of the PPP Network Control Protocol (NCP) is to encapsulate network layer protocols. NCP operates within the Point-to-Point Protocol (PPP) framework, which is commonly used for establishing direct connections between two nodes over a network. While PPP takes care of encapsulating the data link layer frames, NCP is specifically tasked with managing and configuring the network layer protocols running over that link. NCP provides the necessary mechanisms for negotiation and configuration of various network layer protocols as part of the overall PPP session establishment and maintenance process. By facilitating this encapsulation, NCP ensures that multiple network layer protocols can operate over the same link and be effectively used for data transmission. This versatility makes it a fundamental component of the PPP suite, enabling different kinds of network traffic to be routed appropriately across the established connection.