1. Chapter 2

2.  Upon completion of this chapter, you should be able to:  Select & install cables for connecting to a dial-up network  Select & install cables for connecting to an Ethernet network  Identify network cables by sight or name  Identify network cable speed capabilities by name  Identify network connectors by sight or name  Given a scenario and networking requirements, select and install cables for communication between computers and networking devices  Troubleshoot issues with networking media

3. 2.1

4.  Pairs of copper wire wrapped in insulation, twisted around each other  Electrical pulses  Inexpensive & easy to work with  Look up a 500ft roll of Cat6 cable

5.  Crosstalk  Small amount of electricity leaks & jumps to other wires  Problem if you have wires close to each other  Twisting cancels out crosstalk

6. ADVANTAGES DISADVANTAGES  Less expensive  Very flexible  Easy to run  Newer, faster standards designed to run on twisted pair  Thin outer covering  EMI  Keep away from fluorescent lights  Distance limit  Possible eavesdropping

7.  Cat3  Old, slow (10Mbps)  Cat5  100Mbps  Cat5e  1000Mbps/1Gbps  Better against crosstalk/EMI  Cat6  1Gbps & up  10Gbps not recommended  Must use shorter lengths or use Cat6a

8.  RJ11  4 connectors, 2 pairs of wire  Phone/DSL  RJ45  8 connectors, 4 pairs of wire  Ethernet

9.  Category 6 cables have how many wires in them? 88  Which connector is used for phone cables?  RJ11  Which connector is used for Ethernet?  RJ45  Why are twisted pair cabling wires twisted?  To reduce crosstalk  When installing twisted pair cabling, what would you keep it away from?  Fluorescent lights

10.  TestOut Lab 2.1.3  Connect to an Ethernet Network  Quiz on 2.1.4

11. 2.2

12.  Used in very early Ethernet & now for TV  Wireless antenna connections  Cable Internet  Shielding  Thicker cable  BNC or F-connector  RG-6 (current cable TV), RG-59 (older cable TV), RG-58 (old Ethernet)

13. ADVANTAGES DISADVANTAGES  Pretty resistant to EMI  Harder to physically damage  More expensive to install  Thicker than twisted pair  Less flexible & harder to install than twisted pair  High speed networking doesn’t support coax

14.  TestOut  2.2.3 Connect a Cable Modem Lab  2.2.4 Quiz

15.  What kind of common connectors would be on a coax cable?  F or BNC  What kind of signal travels on a coax cable?  Electricity  If you have a cable modem, what type of coax cable do you have?  RG-6  Which cable protects against EMI better, RG- 6 or Cat 5e?  RG-6

16.  What connector would be on a Cat 5 or 6 cable?  RJ45  What in the ceiling could “mess up” the electrical signal in an UTP cable?  Fluorescent lights, electrical boxes/equipment  An electrical motor near a UTP cable causes what kind of interference?  EMI  Signals from one cable jump into another. What problem is this?  Crosstalk  What is the solution to prevent crosstalk on UTP?  Twisting of the pairs

17. 2.3

18.  Transmits pulses of light  Laser or LED  Glass or plastic core  No EMI/RFI; no lightning attraction  Used for high speed & long distance  LAN backbone  Connect ISP to Internet  2 fibers cables used  Transmit & receive

19. ADVANTAGES DISADVANTAGES  Resistant to EMI  No way to eavesdrop on the signal  Fast speeds  Very expensive  Used in backbone  Fragile cable  Difficult to attach connector to cable

20.  Multimode  LED  Many paths of light (thick)  Used in LANs/Campuses 2000 meters  Less $, used more  Single Mode  Laser light  Single, thin path of light  Connects backbone/NOCs 3000 meters  More $, faster speed

22. IssueUTPFiber Optic Bandwidth Distance Immunity to EMI/RFI Immunity to Electrical Hazards Media/Connector cost Installation Skill/Cost Safety Precautions

24.  Which cable is more expensive, copper or fiber?  Fiber  Which cable allows data to travel further, copper or fiber?  Fiber  Why are two strands of fiber used for communication?  Light can only travel in one direction at a time. This will allow for full-duplex.

25.  What signal travel on a single-mode cable?  Laser  Which cable would be used to go further distances?  Single mode  Why would you use fiber between buildings rather than copper?  Fiber does not attract lightning

26.  TestOut  2.3.2- Review Fiber Optic Facts  2.3.3- Connect Fiber Optic Cables 1 Lab  2.3.4- Connect Fiber Optic Cables 2 Lab  2.3.5- Quiz Professor Messer Videos 1.5 Cable Types Copper Connectors (8:05) Copper Cabling (9:28) Straight-Through, Crossover, and Rollover Cables (7:42) Fiber Connectors (3:51) Fiber Cables (7:37) Media Converters (3:19) Network Cabling Tools (8:13) Professor Messer Videos 1.5 Cable Types Copper Connectors (8:05) Copper Cabling (9:28) Straight-Through, Crossover, and Rollover Cables (7:42) Fiber Connectors (3:51) Fiber Cables (7:37) Media Converters (3:19) Network Cabling Tools (8:13)

27. 2.4

28.  Straight-through  We’re going to make them  Crossover  We’re going to make them

29.  TIA/EIA 568A & 568B

30.  568B to 568B  Connect unlike devices  Computer to Hub/Switch  Switch to router port  On the PC NIC  Pins 1 & 2 transmit  Pins 3 & 6 receive

31.  Straight-through  568B to 568B  White-Orange  Orange  White-Green  Blue  White-Blue  Green  White-Brown  Brown

32.  568A to 568B  Like Devices  Switch/hub port to switch/hub port  Router port to router port  PC to router port  PC to PC

33.  Crossover  568B to 568A  Change Oranges & Greens on ONE SIDE!  White-Green  Green  White-Orange  Blue  White-Blue  Orange  White-Brown  Brown

34.  What is the 568B color order?  Wor/Or, WGr/Bl, WBl/Gr, WBr/Br  For speeds of 1000Mbps or more, what Category cable should be used?  Cat 6  What cable…  Goes between same devices? Crossover  Goes from PC to switch? Straight through  Goes from serial to console port? Rollover

35.  What colors do you change for a crossover cable?  Oranges & greens  What pairs transmit?  1 & 2  What pairs receive?  3 & 6

36.  Demarc  Where Internet & phone line enter your building  Inside your building (your responsibility)

37.  MDF (Main Distribution Frame)  Main wiring closet near the demarc  IDF  Other wiring closets that connect to the MDF  Connect to MDF using vertical cabling (VCC) or going up  IDFs connect to each other using horizontal cabling (HCC)

38.  Jacks from this room go to IDF and into a patch panel  Allows you to connect wires to a punch-down block, then use patch cables to connect to a switch  Gives you flexibility in moving cables  Allows for easy labeling

39.  Using punch down tool

40.  Practice a Punch Down on a Patch Panel  TestOut  2.4.6- Connect Patch Panel Cables 1 Lab  2.4.7- Connect Patch Panel Cables 2 Lab  2.4.8- Quiz

41.  What is the point of where the service provider’s wiring enters your building?  Demarc  The fiber cable running down the street has been cut. Whose responsibility is it to fix it?  Service provider  Near the demarc is the point where everything in your network comes together. What is this area called?  MDF  There are 2 wiring closets on this floor that connect together. What are they called & what cabling connects them?  IDF & Horizontal cabling  What cabling connects an IDF to the MDF?  Vertical cabling

42. 2.5

43.  Interference  Unwanted signals  EMI causes (generators, transformers, high-power lines, fluorescent lights)

44.  Use fiber instead of copper  Use STP cable

45.  Signal jumps from one wire to another within the cable & disrupts the data  NEXT  Measurement of crosstalk at one connector end  FEXT  Measurement of crosstalk on other end

46.  Properly connected connectors  Maintain the twists  When putting on a connector  At the punch down block

47.  Loss of signal strength over long cable runs  Prevent it  Don’t exceed max distance of cable  Ethernet is 100m max!  Keep out of very hot areas  Use a repeater if necessary (amplifies the signal)

48.  Shorts  Signal hops to another exposed wire  Signal grounds out (nail through wire)  Opens  Break in wire

49.  Wires may go to correct pins but twists with wrong cable to cancel signal out (prevent crosstalk)

50.  Connector issues  Use right connector so fiber lines up  Dirty connector or jack prevents light/signal  Cable issues  Bending cable too tight breaks the core  Mismatch of single/multimode cable= 99% loss  Signal Loss  Cable length, connectors, splices

51.  Loopback plug  Cable Tester Review TestOut 2.5.5 Review TestOut 2.5.5

52.  The signal on your 400ft UTP run gets weak at the destination, causing the signal to be unreadable. What is the problem?  Attenuation  Unwanted signals are added to your Ethernet cable running over fluorescent lights. What’s the problem?  EMI  The Ethernet cable you made is having problems. Signals are jumping from one wire in the cable to another in the cable. What’s the problem?  Crosstalk

53.  Watch Professor Messer Videos  4.4 – Copper Cable Issues  Troubleshooting Copper Cables (6:19) Troubleshooting Copper Cables (6:19)  Troubleshooting Signal Loss (6:15) Troubleshooting Signal Loss (6:15)  Troubleshooting Network Cabling (4:27) Troubleshooting Network Cabling (4:27)  4.5 – Fiber Issues  Troubleshooting Fiber Issues (5:11) Troubleshooting Fiber Issues (5:11)

54.  Complete the study guide handout  Take all quizzes on TestOut  Jeopardy review

55. Chapter 2