Live Virtual Machine Lab 5.4: Module 05 Troubleshooting Cable Connectivity for Network+

throughput testers, which help you test the upload and download speeds

To test the network adapter for the throughput, you need to use

Power over Ethernet capable devices

There can be situations when power is unavailable, or it is not easy to provide power where these devices are located. In such situations, the devices remain non-functional. The solution to this is

you need to test the cable with a cable analyzer.

A physical fault usually causes a short or a short circuit in a network cable, eventually leading to downtime. To resolve this issue,

splices a fiber-optic cable has, the higher the attenuation will be.

Attenuation, which means reduction in plain English, usually occurs when cable joints or splices are connected using connectors. The more

Throughput

Defines the amount of data transmitted in a specific time.

Fluorescent lights Heavy machinery Cordless phone Microwave Power cables Electrical motors

EMI is generated from various sources, such as:

Shielded Twisted Pair (STP)

Even though it is designed to prevent electromagnetic interferences, it is difficult to install and is also expensive

toxicated smoke compared to PVC cables

If a fire breaks out, plenum cables are much safer and do not create

install a repeater to amplify the signal

If it exceeds the maximum length, you need to

plenum

In an office, above the ceiling tiles, there is a space before the roof. This space is called the

Rollover Cable

It is used to connect a system with a router or switch for the initial configuration.

White Green Green White Orange Blue White Blue Orange White Brown Brown

On one side of the crossover cable, known as the T-568A, the cable order is as follows:

White Orange Orange White Green Blue White Blue Green White Brown Brown

On the other side of the crossover cable, known as T-568B, the cable order is as follows:

802.3af known as PoE and provides 15.4 watts 802.3at known as PoE+ and provides 25.5 watts

There are two PoE standards:

speed settings

Speed is one of the key reasons for connectivity issues. If everything on the network is working fine except the new system you connected to, you may want to check its

network adapter settings type of cable you use

The speed will be limited with

type of cable you use

The throughput can also be limited by the

it adds attenuation, weakens the signals and causes decibel loss.

When a fiber-optic cable is spliced and joined by a connector,

loss of decibel

When the attenuation in a cable increases, there is an evident

Attenuation

a fiber-optic cable reduces the signals that are traveling through it.

rollover cable

a flat blue cable that has an RJ45 (male) connected to a DB9 (female) connector on the other end.

Electromagnetic Interference (EMI)

a type of error that occurs due to various reasons.

Shielded Twisted Pair (STP)

each pair is separately insulated in foil or a similar substance, which prevents electromagnetic interferences from affecting the signal transmission taking place within the wire.

Riser-rated cables

have the self-extinguish capability to stop a fire from spreading through the cable, which means that the fire cannot spread vertically.

you will likely face issues.

if you have a switch that operates at 100 Mbps but your system's network adapter is configured at 1000 Mbps,

connectivity failure or intermittent connectivity issues

the distance of the Ethernet cable might cause

Unshielded Twisted Pair (UTP)

the same as STP, except the four pairs do not have individual shielding.

plenum

used for laying down the network and power cables

Riser-rated cables

used in cable risers and elevator shafts where you cannot use plenum cables

Ports

where cables with connectors connect to.