Section 3 Flashcards
Bus Topology
All the hosts are connected to a single chunk of cable
Ring topology
Consists of a single ring of cabling and anyone who wants to get onto the network has to get on that ring
Star-bus topology
shrunk the bus into a hub/switch (Primary topology today) (hybrid topology)
Logical vs physical topology
Logical, electric diagram the electronic circuit, how the stuff is going to work. Physical, how does the cables physically look if we had them all stretched out
Mesh topology
each comp is connected to every other host on the network. excellent for wireless use. (Fully mesh topology). When one node isn’t connected to every other comp it is a partially meshed topology
Coaxial Cable- Radio Grade (RG)
the thickness of the cable, thickness of the conductors, and Shielding. uses a term called OHMs (measurement of resistance)
RG-58 (50 OHM)
BNC connector, not threaded, old type of cable
RG-59 (75 OHM)
threaded connector, F- type connector, not robust, used with cable modems
Rg-6 (75 OHM)
always thicker cable, used with cable modems
Unshielded Twisted Pair
cheap, use a RJ-45 Connector
568A
Brown, Brown/white,Orange,Blue/White,Blue,Orange/White,Green,Green/white
568B
Brown,Brown/Whie,Green,Blue/white,Blue,Green/white,Orange,Orange/white
Cat 3 (10 mbps)
Cat 5 (100 mbps @ 100 meters)
Cat 5e (100-1000 mbps @ 100 meters)
Cat 6 (1 Gbps @ 100 meters)
Cat 6a (10 Gbps @ 100 meters)
Cat 7 (10 Gbps @ 100 meters, shielded)
Multimode cables
carry LED signals (ORANGE)
Singlemode cables
carry laser signals (YELLOW)
ST Connectors
earliest type, punch in and stay in place (Twist in)
SC Connector
square, punch in and pull out
FC Connector
Screws in
LC Connector
used when you have a lot of fiber optic together
MT-RJ Connector
popular high density connector
PC
slightly round edges
UPC
rounded edges, creates less light loss
APC
7 degree angle, high quality contact
Plenum-rated
gap from the bottom of the drop ceiling to the real ceiling (highest fire rating)
Riser-rated
Gap between floors (middle fire rating)
PVC
no fire protection at all, Price is big difference between Plenum and PVC
Serial Ports
oldest IO connection, low speed 2 way ports, use RS-232
DB-9- 9 pins
DB-25 adaptor- one side is DB-9 and one side is DB-25
Parallel port- used for printers,
IEEE standards
802.3 is Ethernet
Rollover/ Yost Connector
low end way to connect to a device
