Which of the following is used by the Point-to-Point Protocol (PPP) to determine packet formats?

Question

Options

• ALayer 2 Tunneling Protocol (L2TP)
• BLink Control Protocol (LCP)
• CChallenge Handshake Authentication Protocol (CHAP)
• DPacket Transfer Protocol (PTP)

• B
  93% (38)
• C
  2% (1)
• D
  5% (2)

Explanation

Link Control Protocol (LCP) is used by the Point-to-Point Protocol (PPP) to determine packet formats. PPP is a data link layer protocol that provides a standard method for transporting network layer packets over point-to-point links, such as serial lines, modems, or dial-up connections. PPP supports various network layer protocols, such as IP, IPX, or AppleTalk, and it can encapsulate them in a common frame format. PPP also provides features such as authentication, compression, error detection, and multilink aggregation. LCP is a subprotocol of PPP that is responsible for establishing, configuring, maintaining, and terminating the point-to- point connection. LCP negotiates and agrees on various options and parameters for the PPP link, such as the maximum transmission unit (MTU), the authentication method, the compression method, the error detection method, and the packet format. LCP uses a series of messages, such as configure-request, configure-ack, configure-nak, configure-reject, terminate-request, terminate- ack, code-reject, protocol-reject, echo-request, echo- reply, and discard-request, to communicate and exchange information between the PPP peers.

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