What is the purpose of the preamble in an Ethernet frame?

Question:
What is the purpose of the preamble in an Ethernet frame?

• is used as a padding for data
• is used for timing synchronization
• is used to identify the source address
• is used to identify the destination address

Exam with this question: CCNA 1 (v5.1 + v6.0) Chapter 5 Exam Answers

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What is the purpose of the preamble in an Ethernet frame?

• is used as a pad for data
• identifies the source address
• identifies the destination address
• marks the end of timing information
• is used for timing synchronization with alternating patterns of ones and zeros

Exam with this question: Network Fundamentals - CCNA Exploration 1: ENetwork Chapter 7 Exam