What best describes the purpose of the Physical Layer?
- Ensures reliable transmission of data across a physical link.
- Determines connectivity and path selection between two end systems.
- Establishes the physical addressing, network topology and media access.
- Defines the functional specifications for link between end systems and the electrical, optical, and radio signals.
Exam with this question: CCNA 1 Exploration v4.0 Chapter 8 Quiz
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