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Which PPP subprotocol negotiates authentication options?
A. NCP
B. ISDN
C. SLIP
D. LCP
E. DLCI
Correct Answer: D
Explanation/Reference:
Explanation:
A protocol that establishes, configures, and tests data link connections used by the PPP Link Control Protocol offers PPP encapsulation different options, including the following:
Authentication – options includes PAP and CHAP Compression – Data compression increases the throughput on a network link, by reducing the amount of data that must be transmitted. Error Detection -Quality and Magic numbers are used by PPP to ensure a reliable, loop-free data link. Multilink – Supported in IOS 11.1 and later, multilink is supported on PPP links between Cisco routers. This splits the load for PPP over two or more parallel circuits and is called a bundle.