Cable/Media Flashcards
RG-6
Copper Coax Cable
● Commonly used by local cable companies to connect individual homes
RG-59
Copper Coax Cable
● Typically used to carry composite video between two nearby devices
● Example: TV to the cable box
BNC
Stick n Twist coax copper connector
● Termed Bayonet Neill-Concelman or British Naval Connector
● Was used for 10BASE2 Ethernet
F-connector
Screw coax copper conector
● Typically used for cable TV and cable modem connections
UTP
Unshielded twisted pair
▪ Number of twists determines how much EMI can be blocked
● CAT 6 has more twists per inch than CAT 5
▪ UTP is cheaper than STP
▪ Media of choice in most LANs
STP
Shielded Twisted Pair (STP)
▪ Wires are twisted in pairs and surrounded in a metallic shielding to minimize EMI
▪ Outer shielding minimizes EMI, but makes STP cost more than UTP
RJ-45
▪ RJ-45
● 8-pin connector in Ethernet networks
● Most Ethernet use only 4-pins
RJ-11
RJ-11
● 6-pin connector
● Commonly only 2 or 4 pins are used
● Commonly found in telephone systems
DB-9 or DB 25 (RS-232)
DB-9 or DB-25 (RS-232)
● 9-pin or 25-pin D-subminiature
● Used for asynchronous serial communications and connecting to an external modem
Straight-through-Cable (Patch cable)
▪ Both ends of the cable have matching pin outs
▪ T-568B is the preferred standard for wiring a building if no pre-existing pattern is used
▪ Data Terminating Equipment (DTE) to Data Communications Equipment(DCE)
● Computer to switch
● Router to modem
Crossover Cable
CONNECT SWITCH TO SWITCH/DEVICE TO SAME DEVICE
▪ Send and receive pins of the cable are swapped in the end pin outs
▪ Use to connect a WORKSTATION TO WORKSTATION
● Not required if switch support MDIX
Plenum Cable
● Special UTP/STP cable that has a fire-retardant outer insulator o Minimizes dangerous fumes if cable on fire o Safe for use in ceilings, walls, and raised floors
PVC
Non-Plenum Cable
● Normal UTP/STP rated cable
● Cannot be used in raised floors, ceilings, or walls
MMF
Multimode Fiber (MMF)
LED
▪ Shorter distances than single-mode fiber
▪ Larger core size allows for multiple modes of travel for the light signal
▪ Core size: 62.5 microns
▪ Common uses:
● Routers to switches
● Switches to switches
● Servers to switches
SMF
Single-Mode Fiber (SMF) LASERS ▪ Longer distances than multimode fiber ▪ Smaller core size allows for only a single mode of travel for the light signal ▪ Core size: 10 microns ▪ Common uses:
● Routers to switches
● Switches to switches
