Why are Network Control Protocols used in PPP?
- To establish and terminate data links
- To provide authentication capabilities to PPP
- To manage network congestion and to allow quality testing of the link
- To allow multiple Layer 3 protocols to operate over the same physical link
Explanation: PPP uses the Network Control Protocol (NCP) process to negotiate the Layer 3 protocols to operate over the link. IPCP is an example of an NCP for IP.
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