Implementing a network Flashcards
What are three fundamentals areas of making an enterprise LAN
Comms room
Horizontal cabling
Area
Between Solid and stranded core, which is more flexible but has less signal?
Stranded
What type of cabling between solid and stranded core is used in runs?
Solid core
What’s the difference between IDF and MDF
An intermediate distribution frame (IDF) is a free-standing or wall-mounted rack for managing and interconnecting the telecommunications cable between end user devices and a main distribution frame (MDF). For example, an IDF might be located on each floor of a multi-floor building routing the cabling down the walls to an MDF on the first floor. The MDF would contain cabling that would interconnect to the phone company or to other buildings
How many inches is a U
1.75 per
What is the purpose of a server rail
It holds servers and lets you slide them out so that they can be maintained.
What is a way to prevent server theft
Putting locks on the servers.
What is the name of the wiring system at the back of a patch panel where you individually punch wires down into the device.
110 punchdown block.
True or false: Patch panels use cat ratings too
They do
What is a patch bay
A patch panel for things that aren’t network related. Can be used for musical instruments, etc.
Do wall outlets also have cat ratings?
Yes
What is the name of the phonline punchdown block
66 punchdown
What is the name of the device that distributes the connection throughout the building after a demarc point
a customer-premises equipment or customer-provided equipment (CPE) is any terminal and associated equipment located at a subscriber’s premises and connected with a carrier’s telecommunication circuit at the demarcation point (“demarc”).
What is a Network Interface Unit
Usually the demarc point of a network.
What is a vertical cross connect
The routers/switches that take the backbone connection vertically up or down to other floors. A horizontal cross connect is to the same floor.
What is a cable drop
This takes place at the end of a run. It’s where the cable comes down from the roof and to the walljack / computer.
What are three wiring issues you could face after implementing a run
Interference
Signal degradation
Improper termination
What does a wire map do
Tests termination
What can multi meters test within an ethernet cable
Continuity
What is the purpose of a Time domain reflectometer
To find breaks in ethernet cabling
What is NEXT and FEXT
Crosstalk either happening at the sending end or receiving end of a bad ethernet cable
What is attenuation
Signal getting weaker as it carries on.
What is the delay between a frame being sent and received called?
Latency
What unit of measurement is used to measure signal loss in networks
dB
What two physical problems can fiber connectors have that could impede their performance
Dirty connector, likely smudged by fingers, or misaligned contacts.
What is dispersion
A signal slowly spreading out over time
You plug a third party transceiver into a cisco switch and the plug fits just fine, but you get no connection. You know the connector is good. What are two potential reasons why it won’t work?
Switch is not compatible with transceiver
Different wavelengths between cable and what the switch expects
What is port aggregation / link aggregation
Using multiple NICS for one system to increase bandwidth.
What is the other name for link lights
LED status indicators
What do the two link lights usually show
Connectivity, speed, activity.
Connectivity is usually a solid light
Activity is shown via rapid blinking when there’s activity on the network
Speed is shown through different coloured LEDs
Why can’t you always trust physical link lights
The connectivity link light only shows if two devices are connected, not that the connection itself works. Even then, you can have issues where one side of a cable has a connectivity light and the other doesn’t. Always check both the PC and switch’s link lights for a more accurate image of what’s happening.
A system has no connection. You see both the connectivity link lights are on but you still can’t get the pc to see network resources no matter what you do. You start to suspect the cable is the issue. What device can you use to verify?
Time domain reflectometer can detect breaks in cable
What does a fox and hound do
Locates specific cables
What is IPV6 SLAAC
stateless address autoconfiguration is when IPV6 hosts configure their addresses without the use of DHCP. They will generate an address, then use neighbour discovery protocol to make sure no one else has that address already.
