Implementing a network

Question 1

What are three fundamentals areas of making an enterprise LAN

Answer 1

Comms room
Horizontal cabling
Area

Question 2

Between Solid and stranded core, which is more flexible but has less signal?

Answer 2

Stranded

Question 3

What type of cabling between solid and stranded core is used in runs?

Answer 3

Solid core

Question 4

What’s the difference between IDF and MDF

Answer 4

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

Question 5

How many inches is a U

Answer 5

1.75 per

Question 6

What is the purpose of a server rail

Answer 6

It holds servers and lets you slide them out so that they can be maintained.

Question 7

What is a way to prevent server theft

Answer 7

Putting locks on the servers.

Question 8

What is the name of the wiring system at the back of a patch panel where you individually punch wires down into the device.

Answer 8

110 punchdown block.

Question 9

True or false: Patch panels use cat ratings too

Answer 9

They do

Question 10

What is a patch bay

Answer 10

A patch panel for things that aren’t network related. Can be used for musical instruments, etc.

Question 11

Do wall outlets also have cat ratings?

Answer 11

Yes

Question 12

What is the name of the phonline punchdown block

Answer 12

66 punchdown

Question 13

What is the name of the device that distributes the connection throughout the building after a demarc point

Answer 13

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”).

Question 14

What is a Network Interface Unit

Answer 14

Usually the demarc point of a network.

Question 15

What is a vertical cross connect

Answer 15

The routers/switches that take the backbone connection vertically up or down to other floors. A horizontal cross connect is to the same floor.

Question 16

What is a cable drop

Answer 16

This takes place at the end of a run. It’s where the cable comes down from the roof and to the walljack / computer.

Question 17

What are three wiring issues you could face after implementing a run

Answer 17

Interference
Signal degradation
Improper termination

Question 18

What does a wire map do

Answer 18

Tests termination

Question 19

What can multi meters test within an ethernet cable

Answer 19

Continuity

Question 20

What is the purpose of a Time domain reflectometer

Answer 20

To find breaks in ethernet cabling

Question 21

What is NEXT and FEXT

Answer 21

Crosstalk either happening at the sending end or receiving end of a bad ethernet cable

Question 22

What is attenuation

Answer 22

Signal getting weaker as it carries on.

Question 23

What is the delay between a frame being sent and received called?

Answer 23

Latency

Question 24

What unit of measurement is used to measure signal loss in networks

Answer 24

dB

Question 25

What two physical problems can fiber connectors have that could impede their performance

Answer 25

Dirty connector, likely smudged by fingers, or misaligned contacts.

Question 26

What is dispersion

Answer 26

A signal slowly spreading out over time

Question 27

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?

Answer 27

Switch is not compatible with transceiver

Different wavelengths between cable and what the switch expects

Question 28

What is port aggregation / link aggregation

Answer 28

Using multiple NICS for one system to increase bandwidth.

Question 29

What is the other name for link lights

Answer 29

LED status indicators

Question 30

What do the two link lights usually show

Answer 30

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

Question 31

Why can’t you always trust physical link lights

Answer 31

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.

Question 32

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?

Answer 32

Time domain reflectometer can detect breaks in cable

Question 33

What does a fox and hound do

Answer 33

Locates specific cables

Question 34

What is IPV6 SLAAC

Answer 34

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.