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Chapter 17 Power over Ethernet (PoE)

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  1. Certified Wireless Network Administrator (CWNA) PW0-105 Chapter 17 Power over Ethernet (PoE)

  2. Chapter 17 Overview • History of PoE • PoE Devices • Planning and Deploying PoE 2 Certified Wireless Network Administrator: CWNA – PW0-105

  3. History of PoE • PoE provides power to devices over Ethernet cables • Commonly used for VoIP desk phones • Used for APs and other network devices • The PSTN uses power over phone lines to power analog traditional phones 3 Certified Wireless Network Administrator: CWNA – PW0-105

  4. PoE Types • Nonstandard • 802.3af • 802.3-2005, clause 33 • 802.3at-2009 4 Certified Wireless Network Administrator: CWNA – PW0-105

  5. PoE Devices • Powered Device (PD) • Draws or consumes power • Power-Sourcing Equipment (PSE) • Provides power • Endpoint PSE • Midspan PSE 5 Certified Wireless Network Administrator: CWNA – PW0-105

  6. PoE Devices (Endpoint PSE) 6 Certified Wireless Network Administrator: CWNA – PW0-105

  7. PoE Devices Endpoint (Alternative A)10BaseT and 100BaseTX 7 Certified Wireless Network Administrator: CWNA – PW0-105

  8. PoE Devices Endpoint (Alternative A)1000BaseT 8 Certified Wireless Network Administrator: CWNA – PW0-105

  9. PoE Devices Endpoint (Alternative B)10BaseT and 100BaseTX 9 Certified Wireless Network Administrator: CWNA – PW0-105

  10. PoE Devices Endpoint (Alternative B)1000BaseT 10 Certified Wireless Network Administrator: CWNA – PW0-105

  11. PoE Devices Midspan (Alternative A)10BaseT and 100BaseTX 11 Certified Wireless Network Administrator: CWNA – PW0-105

  12. PoE Devices Midspan (Alternative A)1000BaseT 12 Certified Wireless Network Administrator: CWNA – PW0-105

  13. PoE Devices Midspan (Alternative B)10BaseT and 100BaseTX 13 Certified Wireless Network Administrator: CWNA – PW0-105

  14. PoE Devices Midspan (Alternative B)1000BaseT 14 Certified Wireless Network Administrator: CWNA – PW0-105

  15. PoE Devices Three PSE Solutions 15 Certified Wireless Network Administrator: CWNA – PW0-105

  16. Planning and Deploying PoE • Power planning • PSE must be capable of providing needed power • Redundancy • Devices powered by PoE must have failover options in enterprise deployments 16 Certified Wireless Network Administrator: CWNA – PW0-105

  17. Chapter 17 Summary • History of PoE • PoE Devices • Planning and Deploying PoE 17 Certified Wireless Network Administrator: CWNA – PW0-105