Chapter 3 - Cabling and Technology Flashcards
Define ‘Network Topology’
The way that cables and other pieces of hardware connect to each other.
What is a ‘Bus’ Topology
Uses a single cable to connect all computers in a network.
What is a ‘Ring’ Topology
Connects all computers in a ring of cable.
What is a ‘Star’ Topology
Uses a central connection for all the computers on the network
What makes Star better an improvement over Bus and Ring
By offering fault tolerance, if one computer goes down the other computers will still be able to communicate.
How is a topology looked at now days?
We look at how the signal is traveling through the network rather than the actual physical cabling, etc.
What are the two main topologies for Wireless networks
Mesh & Point to Multi-Point
What is a Mesh topology
Every node connects to every computer on the network via two or more routes
What are the two varieties of Mesh topology
Partiallly Meshed
Fully Meshed
What is a Partially vs Fully Meshed topology
partially = At least two machines have redundant connections full = every computer connects directly to every other computer
What is Point to Multi Point Topology
A single system is used for all other systems to communicate through. This requires an intelligent device in the center.
What is Point to Point Topology
Two computers are directly connected to each other.
Define Network Technology and provide examples of such.
A practical application of topologies and other network tech in order to move data from one computer to another on the network.
Example: 10baseT, 1000BaseF, 10BaseLX
How is a Coaxial Cable constructed
A central conducting wire that is covered in an insulating material, which is covered in braided metal for strength. This is then covered by a jacket to minimize interference.
Where may you find coaxial cable being used presently?
Primarily used by an ISP to connect to a modem.
What would an ISP use to terminate their coaxial cable?
RG-6 is used for internet, RG-59 would be found for cable and television
How are coaxial cables rated
By a Radio Grade rating, a measure of Ohms, how much resistance is in the cable.
RG-6/RG-59 = 75 Ohms
What is impedance
A set of characteristics that define how much the cable resists the flow of electricity
What are the Four CAT ratings for UTP cables, what are the max bandwiths/frequencies
CAT 3 - 16 Mhz, 16 Mbps CAT 5 - 100 Mhz, 100 Mbps CAT 5E - 100 Mhz, 1000 Mbps CAT6 - 250 Mhz, 10000 Mbps CAT6A - 500 Mhz, 10000 Mbps
How does frequency translate into bandwith
1 cycle (1 hz) = 1 bit/second
How do developers squeeze more bandwidth into the same frequency
Bandwidth Efficient Encoding Schemes
How do Fiber cables transmit data
Using light
What are the advantages to fiber?
Faster and can travel much farther (10 KM). It is also resistant to EMI
How is a fiber cable constructed
The glass fiber -> cladding (reflective material) -> Buffer material (strength) -> Instulating Jacket.
What is a fiber cable that uses LEDs called?
Multi Mode fiber
What is a fiber cable that uses lasers called?
Single Mode Fiber.
What are the four major Fiber connectors
ST - Straight Tip
SC - Short Tip
LC - Always duplex
FC - Screws into place,
How are parallel cables limited
Limited to a point to point topology
