Network+: Cabling

  1. Network+ Certification (N10-007): Syllabus
  2. Network+ : Introductions and Resources
  3. Network+ : Network Models
  4. Network+: Cabling
  5. Network+ : Topologies
  6. Network+ : Ethernet Basics
  7. Network+ : Contemporary Ethernet
  8. Network+ : Installing a Physical Network
  9. Network+ : Booting and Getting On the Network
  10. Network+ : TCP/IP Basics
  11. Network+ : Subnetting
  12. Network+: Routing Protocols
  13. Network+ : Routing and Firewalls
  14. Network+ : TCP/IP Ports and Applications
  15. Network+ : Network Naming and Sharing Resources
  16. Network+ : Secure Networking
  17. Network+ : Advanced Networking Devices
  18. Network+ : IPv6
  19. Network+ : Remote Connectivity
  20. Network+ : WiFi
  21. Network+ : Virtualization
  22. Network+ : Mobile Networking
  23. Network+ : Building a Real-World Network
  24. Network+ : Managing Risk
  25. Network+ : Protecting Your Network
  26. Network+ : Network Monitoring
  27. Network+ : Network Troubleshooting
  28. Network+: Network Monitoring

Unit 4

Chapter 2


Ethernet Coaxial

Thicknet (500 meters)

RG-8 – 10Base5


Vampire Tap

50 ohm terminating resisters at every endpoint

Thinnet (200 yards, 185 meters)

RG-58 – 10Base2

Connectors: BNC (“bayonet”) – a steel, stick and twist connector

50 ohm resisters

Cable Service Coaxial/Twinaxial

RG-6 – Cable TV service, analog service, security cameras

RG-62 – TV

RG-59 – Cable service : Siamese (TwinAxial) cable: coax bonded to two conductor wires (primitive “power over ethernet” – analog)

75 ohm resisters

Twisted Pair Ethernet

Twisted pair Ethernet cable has 4 pairs (8 wires), but only 2 pairs are used. Theoretically this supports 2 Ethernet ports per cable, though this feature usually goes unused. Ports and jacks use the RJ-45 standard, similar to the telephone RJ-11 jack.

Get familiar with the T-568A & B jack and plug pinout configuration. Memorize the B pinouts and learn to use the acronym GO to get the A pinouts. For some reason everyone uses B most of the time. This site is clear and to-the-point:

Almost all standards for Twisted Pair call for runs of a maximum of 100 meters. In-wall cable is usually limited to 90 meters to allow patch cables at both ends.


Shielded Twisted Pair

Was mostly used with Token Ring.

Use in high-EMI/RFI areas where shielding is needed.


Unshielded Twisted Pair

10BaseT: minimum Cat 3

100BaseTX, which became simply
100BaseT: minimum Cat 5

100BaseT4: an early alternative that used all 4 pairs in a Cat 3 cable

1000BaseT or 1GBaseT: Cat5e

10GBaseT: Cat 6 will get you 55 meters, Cat 6a will get you 100 meters.

Fiber Optic

LEDs – short distance

Lasers – long distance

Multimode fiber: usually orange; short distance; uses multiplexing, for instance three different signals: red, green and blue

Single-mode fiber: usually yellow; long distance; simplex: only one signal stream

Physical Contact (PC) Connectors

Flat-surface connector

Ultra Physical Contact (UPC)

Angled Physical Contact (APC)

Media converters

10BaseFL – early fiber optic


1000BaseSX: “S for short” distance, up to 500 meters

1000BaseLX: “L for long” distance, up to 5 kilometers

ATM over SONET rings

The national long-distance telephone system.

10 Gbps

ATM used 53 byte cells

Fading away…

Metro Ethernet over SONET

Uses SONET rings, so 10GB

10GBaseSR: S for short; R is for eth-R-net; multimode; 300 meters

10GBaseSW: W is for WAN (meaning ATM signaling, not Ethernet); multimode; 300 meters

10GBaseLR: Ethernet, single-mode; 10 kilometers

10GBaseLW: WAN/ATM; 10 km

10GBaseER: E is for extra-long; ethernet; 40 km

10GBaseEW: WAN/ATM; 40 km


ST – Stick and Twist
SC – Stick and Click
LC – the “Little Connector” (actually Lucent)

Early Gigabit Media

1000BaseCX (copper, 25 yd)
1000BaseSX (“short” fiber-optic)
1000BaseLX (“long” fiber-optic)


Repeater – Layer 1 – usually for coaxial, but there are twisted pair repeaters too.

Bridge – Layer 2 – also usually for coax, and essentially a 2-port switch, i.e. it keeps a MAC table.

Hub – Layer 1 – has no MAC filtering.

Switch – Layer 2 – isolates traffic based on MAC addresses.

Router – Layer 3 – routes internet traffic based on IP addresses. This is the only Layer 3 box in this list.