Network Cables - CompTIA A+ 220-1101 - 3.1
Fundamentals of Network Cabling
This section delves into the importance of selecting the right cable for network communication, focusing on twisted pair copper cabling commonly used in ethernet networks.
Inside Ethernet Cable
- Twisted pair copper cabling is prevalent in ethernet networks.
- Each ethernet cable contains four pairs of wires with different colors.
- The pairs carry equal and opposite signals to counter interference, aided by twisting within the cable.
Types of Twisted Pair Cables
- Different twist rates exist among wire pairs to combat interference.
- Various categories of twisted pair cables support different network types.
- Ethernet standards like 1000BASE-T and 10GBASE-T specify minimum cable categories for operation.
Plenum and Cable Jacket
- Special considerations are necessary for plenum environments.
- Plenum areas house network cables and require fire-safe cabling to prevent toxic fumes during fires.
- Plenum-rated cables use materials like FEP or low smoke PVC for safety.
Unshielded Twisted Pair (UTP)
- UTP cables are common in most network setups.
Shielded Twisted Pair Cables
In this section, the speaker discusses the different types of shielded twisted pair cables used in networking, highlighting their construction and abbreviations.
Shielded Twisted Pair Cable Types
- Shielded Twisted Pair (STP) cables are recommended for better protection. They may have a shield around the entire cable or individual wires.
- Cable types are indicated by abbreviations like U for unshielded, S for braided shielding, and F for foil shielding. The abbreviation includes a letter, a slash, another letter, and TP to describe the twisted pair.
- Different cable configurations include F/UTP (foil around entire cable), F/FTP (braided shield around cable with foil around pairs), and direct burial STP cables designed for outdoor use.
- Direct burial STP cables have waterproofing and gel inside to protect against water. They can be buried directly without conduit. These cables offer interference prevention and add strength due to shielding.