Physical media - PowerPoint Presentation

Physical media
Physical media

Physical media - Description


Coaxial Twisted pair Fiber optic 1 2 Coaxial Cable 3 Coaxial Cable Types Bus   RG8 RG58 Application Thick Ethernet 500 meters 10Base5 Thin Ethernet 185 meters 10Base2 ID: 495160 Download Presentation

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Slide1

Physical media

CoaxialTwisted pairFiber optic

1Slide2

2

Coaxial Cable Slide3

3

Coaxial Cable Types - Bus

 

RG-8

RG-58

Application

Thick Ethernet

(500 meters)

10Base-5

Thin Ethernet

(185 meters)

10Base-2

Thickness

0.405 inch

0.195 inch

Connector Type

N

BNC with a T-fittingSlide4

Other

Plenum – space between floorsPlenum type cable – demanded by the National Fire Protection Association that cables run within the plenum have been tested and guaranteed as save, that is, thye must be

Fire retardant and create little or no smoke and poisonous gas when burned

RG-59 for TV, RG-6 for TV and cable modems

RG-62 for ARCnet - obsolete

4Slide5

5

Twisted-Pair Cable Slide6

6

UTP Cable Grades

EIA/TIA Grade

Applications

Cat2

For voice, obsolete

Category 3 (16 MHz)

Voice-grade telephone networks, 10-Mbps Ethernet, 4-Mbps Token Ring, 100Base-T4 Fast Ethernet, and 100Base-VG-AnyLAN

Category 4 (20 MHz)

16-Mbps Token Ring

Category 5

100Base-TX Fast Ethernet, Synchronous Optical Network (SONET), and Optical Carrier (OC3) Asynchronous Transfer Mode (ATM)

Category 5e and 6

1000Base-T (Gigabit Ethernet)

Category 6 (250 MHz)

Become standard in 2002, backboneSlide7

Connect s

RJ-11 for phone and DSL (Digital Subscriber Link)RJ-45 for LAN, use a crimper to connect the wires to the connect first

7Slide8

8

Fiber Optic CableSlide9

The Cores

Can be glass for greater distance, or Plastic to reduce cost

9Slide10

Single Mode vs. Multimode Fiber

Single mode, single-mode optical fiber (SMF) is an optical fiber designed to carry only a single ray of light (mode)

Multimode fiber optic cable has a large

diametral

core that allows multiple modes of light to propagate

http://en.wikipedia.org/wiki/Multi-mode_optical_fiber

http://www.multicominc.com/active/manufacturer/multicom/Fiber%20Optics/singlemode-multimode.html

10Slide11

Multimode Fiber

11Slide12

12

Fiber Optic Cable Types

Singlemode

(SMF):

Used for wide area networks (WANs) and other long cable runs, glass core, light source is transmitted from end to end and pulsed to communicate, can go up to 40 km

Multimode (MMF):

Used for local area networks (LANs) and short cable runs, light is reflected by cladding, core can be either glass or plastic, 1/50 the speed of SMF, 3000 ft distanceSlide13

Pros and Cons of fiber

13Slide14

14

Fiber Optic Connectors (SC, ST)Slide15

15

Fiber Optic Connectors – ST and SC

See page 64 (N10 – 00 5 edition) for examples of ST and SC connectors

Fiber cables always need a pair – one for each direction (sending and receiving)

Figure 3.8 a MT-RJSlide16

Serial Cables

RS-232USB (Universal Serial Bus) can connect up to 127 devices

16Slide17

Properties of cables

Transmission speed – unit MbpsDistance UTP – 100 metersAttenuation – the degradation of signal due to medium “burns” energy

Duplex

Noise Immunity

Frequency

Cat 5e can go 1Gbps for short distance

Cat 6, build for 1Gbps

17Slide18

Wiring Standards

568A straight –through cable568B Crossover cableRolled cable

Hardware loopback

18Slide19

568A straight –through cable

19Slide20

568B Crossover cable

20Slide21

Rollover – mostly CISCO

21Slide22

Loopback

22Slide23

Wiring Distributions

Vertical Between floorsHorizontal

Within the same floor

23Slide24

Patch Panels -- inactive

24Slide25

Demarc

Demarcation – last point of responsibility

25

Shom More....
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