In this section of the course,
we're going to discuss troubleshooting physical networks.
From cable faults and connector issues
to network interference and hardware failures,
it's really important that you understand
how to effectively pinpoint
and fix physical network problems if you want to maintain
a reliable and efficient network infrastructure.
So in this section, we're going to be focused
solely on Domain 5 network troubleshooting once more,
and this time, we'll be focused on Objective 5.2.
Objective 5.2 states that given a scenario,
you must be able to troubleshoot common cabling
and physical interface issues.
First, we're going to look at network cable limitations.
We'll examine how factors such as the cable length,
the type, and the quality can restrict your bandwidth
and affect your overall performance of your network.
Then, we'll discuss cable signal issues.
We're going to look at the causes of signal degradation,
such as interference and attenuation,
which can compromise data transmission
over your network cables.
Next, we'll learn about copper cable issues.
We're going to explore the susceptibility of copper cables
to electromagnetic interference, physical damage,
and corrosion, and all these can lead
to connectivity problems.
After that, we're going to dive into fiber cable issues.
Now, we're going to consider the challenges
specific to fiber cables, including bending,
dirty connectors and splicing errors, which can all disrupt
the light-based signals within our cables.
Then we're going to cover ethernet issues.
We'll discuss common ethernet problems
that range from auto negotiation misconfigurations,
to collision domains that can impede your network traffic.
Next, we'll look at interface issues.
We're going to review how incorrect settings
or faulty interfaces on the network device
can cause packet loss, errors
and other connectivity issues for you.
After that, we'll explore power over ethernet or PoE issues.
Here, we'll address the complexities
of delivering power alongside data on the same cable,
because this can lead to equipment malfunctioning
if you're not properly implementing PoE.
Finally, we'll take a short quiz to see
what you learned during this section of the course
and review your answers
to ensure you know why the right answers were right
and the wrong answers were wrong.
So if you're ready, let's get started
troubleshooting physical networks
in this section of the course.