Orientation e Chapter 2 Data link, internet, transport, and application layers Characterized by message exchanges Chapter 3 Physical layer( Layer 1) There are no messages-bits are sent individually Concerned with transmission media, plugs, signaling methods propagation effects Chapter 3: Signaling, UTP, optical fiber, and topologies Wireless transmission is covered in Chapter 5 22 Orientation • Chapter 2 – Data link, internet, transport, and application layers – Characterized by message exchanges • Chapter 3 – Physical layer (Layer 1) – There are no messages—bits are sent individually – Concerned with transmission media, plugs, signaling methods, propagation effects – Chapter 3: Signaling, UTP, optical fiber, and topologies – Wireless transmission is covered in Chapter 5