Which two statements about the WAN OSI Layer 1 are true? (Choose two.)

IT Questions BankCategory: CCNA 3 v7Which two statements about the WAN OSI Layer 1 are true? (Choose two.)

Which two statements about the WAN OSI Layer 1 are true? (Choose two.)

  • It describes how data will be encapsulated into a frame.
  • It describes the electrical, mechanical, and operational components needed to transmit bits.
  • It includes protocols such as PPP, HDLC, and Ethernet.
  • It includes protocols such as SDH, SONET, and DWDM.

Explanation: The WAN OSI Layer 1 describes the electrical, mechanical, and operational components needed to transmit bits, and includes protocols such as SDH, SONET, and DWDM.

Exam with this question: 7.2.9 Check Your Understanding - WAN Operations

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