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Chapter 9: Network Access. Network Basics. Chapter 9 : Objectives. Students will be able to: Explain the role of the data link layer in supporting communications across data networks. Compare media access control techniques and logical topologies used in networks.
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Chapter 9:Network Access Network Basics
Chapter 9: Objectives Students will be able to: Explain the role of the data link layer in supporting communications across data networks. Compare media access control techniques and logical topologies used in networks. Explain how physical layer protocols and services support communications across data networks. Build a simple network using the appropriate.
Chapter 9 • 9.1 Data Link Layer • 9.2 Media Access Control • 9.3 Physical Layer • 9.4 Network Media • 9.5 Summary
Purpose of the Data Link LayerData Link Sublayers 802.3 Ethernet 802.11 Wi-Fi 802.15 Bluetooth
Characteristics of the Physical LayerPhysical Layer Functions
Characteristics of the Physical LayerPhysical Components Management Ports Gigabit Ethernet Interfaces SHDSL Interface USB Type A Connector USB Mini-B Connector FastEthernet Switch ports
Characteristics of the Physical LayerFrame Encoding Techniques • Manchester encoding • Non-Return to Zero (NRZ)
Characteristics of the Physical LayerSignaling Method Asynchronous Signal Bursty data Arbitrary gap of time Synchronous Signal Data transitions align with bit time slots Bit time slot
Characteristics of the Physical LayerSignaling Method Amplitude modulation Frequency modulation Phase modulation
Copper CablingCopper Media Unshielded Twisted Pair (UTP) cable Shielded Twisted Pair (STP) cable Coaxial cable
Copper CablingShielded Twisted-Pair (STP) Cable Braided or Foil Shield Foil Shields