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CISCO NETWORKING ACADEMY PROGRAM (CNAP) SEMESTER 1/ MODULE 7

CISCO NETWORKING ACADEMY PROGRAM (CNAP) SEMESTER 1/ MODULE 7. Ethernet Technologies. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7. Ethernet Fundamentals. Objectives. Upon completion of this module, students will be able to perform tasks related to the following:

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CISCO NETWORKING ACADEMY PROGRAM (CNAP) SEMESTER 1/ MODULE 7

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  1. CISCO NETWORKING ACADEMY PROGRAM (CNAP) SEMESTER 1/ MODULE 7 Ethernet Technologies

  2. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Fundamentals Objectives • Upon completion of this module, students will be able to perform tasks related to the following: • 10-Mbps and 100-Mbps Ethernet • Gigabit and 10-Gigabit Ethernet

  3. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies Types of Ethernet

  4. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10-Mbps Ethernet • 10BASE5, 10BASE2, and 10BASE-T all share the same timing parameters, as shown below

  5. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10-Mbps Ethernet • The encoding technique used in 10-Mbps Ethernet is called “Manchester”

  6. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10BASE5 • 10BASE5 transmitted 10 Mbps over a single thick coaxial cable bus • Each of the maximum five segments of thick coax may be up to 500 m (1640.4 ft) in length • 10BASE5 only runs in half-duplex resulting in a maximum of 10 Mbps of data transfer • Figure shown below illustrates one possible configuration for a maximum end-to-end collision domain • Between any two distant stations only three repeated segments are permitted to have stations connected to them • with the other two repeated segments used only as link segments to extend the network.

  7. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10BASE2 • 10BASE2 transmitted 10 Mbps over a single thin coaxial cable bus • Each of the maximum five segments of thick coax may be up to 185 m in length • 10BASE2 only runs in half-duplex resulting in a maximum of 10 Mbps of data transfer • There may be up to 30 stations on any individual 10BASE2 segment • Out of the five consecutive segments in series between any two distant stations • Only three may have stations attached

  8. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10BASE2

  9. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10BASE-T • 10BASE-T used Category 3 unshielded twisted pair (UTP) copper but recommended that any new cable installations be made with Category 5e or better • A 10BASE-T UTP cable has a solid conductor for each wire in the maximum 90 meter horizontal cable • Originally 10BASE-T was a half-duplex protocol, but full-duplex features were added later • 10BASE-T carries 10 Mbps of traffic in half-duplex mode and 20 Mbps in full-duplex mode

  10. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10BASE-T Wiring & Architecture

  11. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 100-Mbps Ethernet • 100-Mbps Ethernet is also known as Fast Ethernet or IEEE 802.3u • The two technologies that have become important are: • 100BASE-TX, which is a copper UTP medium • 100BASE-FX, which is a multimode optical fiber medium • Two separate encoding steps are used by 100-Mbps Ethernet • The first part of the encoding uses a technique called 4B/5B • the second part of the encoding is the actual line encoding specific to copper or fiber

  12. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 100BASE-TX • 100BASE-TX using Cat 5 UTP cable • 100BASE-TX uses 4B/5B encoding, which is then scrambled and converted to multi-level transmit-3 levels or MLT-3 • 100BASE-TX carries 100 Mbps of traffic in half-duplex mode. • In full-duplex mode, 100BASE-TX can exchange 200 Mbps of traffic

  13. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 100BASE-FX • 100BASE-TX using Fiber Optic cable • 100BASE-FX also uses 4B/5B encoding which called NRZI (Nonreturn to Zero Inverted) encoding

  14. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies Fast Ethernet Architecture • Fast Ethernet links generally consist of a connection between a station and a hub or switch • A Class I repeater may introduce up to 140 bit-times of latency and is any repeater that changes between one Ethernet implementation and another • A Class II repeater may only introduce a maximum of 92 bit-times latency • Because of the reduced latency it is possible to have two Class II repeaters in series

  15. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 1000-Mbps Ethernet • The 1000-Mbps Ethernet, Gigabit Ethernet or IEEE 802..3z standards represent transmission using both fiber and copper media • Fiber-based Gigabit Ethernet (1000BASE-X) uses 8B/10B encoding which is similar to the 4B/5B concept • 1000BASE-TX, 1000BASE-SX, and 1000BASE-LX use the same timing parameters, as shown below

  16. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 1000BASE-T • 1000BASE-T use all four pairs of wires (must meet the higher quality Category 5e or ISO Class D (2000) requirements) • The 1000BASE-T encoding with 4D-PAM5 (4-Dimensional 5 level Pulse Amplitude Modulation) line encoding • In idle periods there are 9 voltage levels found on the cable, and during data transmission periods there are 17 voltage levels found on the cable

  17. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 1000BASE-SX & LX • 1000BASE-X uses 8B/10B encoding converted to non-return to zero (NRZ) line encoding • The NRZ signals are then pulsed into the fiber using either short-wavelength or long-wavelength light sources: • The short-wavelength uses an 850 nm laser or LED source in multimode optical fiber (1000BASE-SX) • The long-wavelength 1310 nm laser source uses either single-mode or multimode optical fiber (1000BASE-LX)Laser sources used with single-mode fiber can achieve distances of up to 5000 meters

  18. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies Gigabit Ethernet Architecture • 1000BASE-SX • 1000BASE-LX

  19. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10-Gbps Ethernet • IEEE 802.3ae was adapted to include 10 Gbps full-duplex transmission over fiber optic cable • As is typical for new technologies, a variety of implementations are being considered, including: • 10GBASE-SR – Intended for short distances over already-installed multimode fiber, supports a range between 26 m to 82 m • 10GBASE-LX4 – Uses wavelength division multiplexing (WDM), supports 240 m to 300 m over already-installed multimode fiber and 10 km over single-mode fiber • 10GBASE-LR and 10GBASE-ER – Support 10 km and 40 km over single-mode fiber • 10GBASE-SW, 10GBASE-LW, and 10GBASE-EW – Known collectively as 10GBASE-W are intended to work with OC-192 synchronous transport module (STM) SONET/SDH WAN equipment

  20. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10-Gbps Ethernet

  21. CISCO NETWORKING ACADEMY PROGRAM SEMESTER 1/ MODULE 7 Ethernet Technologies 10-Gbps Ethernet Implementations

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