A plus 220-1001 Exam Objective 2.8 – Dumps4shared

A plus 220-1001 Exam Objective 2.8

A+ Exam Objective 2.8

2.8 Given a scenario, use appropriate networking tools.

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Welcome to CertBlaster ExamNotes! In this session, we will look at the tools necessary to keep your network running optimally. These include diagnostic and performance tools. Have fun and use your knowledge for optimization!

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CAT 5 and CAT 6 cable use the same crimping tool. Be sure to
match the cable ends against each other and the wiring standards. Your typical
crimper will be able to do all RJ cable terminations.


Cable stripper

Most cable types require some to all of the protective coatings to
be removed before it can be terminated. Coaxial cable is a good example of this
since the outer sheath needs to be cut away, exposing the mesh shielding,
before the protection for the core removed. Each cut must be at a predetermined
depth and sequence.

Coax stripper tool


Multimeters can be analog or digital. Analog meters are designed
to test continuity, positive AC, and negative voltages as well as resistance.
The display typically consists of a needle over a gradient background, with the
needle resting on the value currently being measured. The delicate internal
windings can be damaged on an analog Multimeter from extreme under-voltage or
over-voltage. Digital Multimeters address this problem by auto-ranging
themselves into the volt/amp range that would provide relevant output. Otherwise,
digital Multimeters would display an error message.


Tone generator & probe

Using a tone generator and probe, cables can be traced and
followed end-to-end. One device is useless without the other. During operation,
one wire has a tone applied to it at a frequency readable by the probe. If an
audible signal is produced at the opposite end of the test cable, you have the
right cable.

Toner probe

Cable tester

An indispensable tool for network diagnostics, the cable tester
can diagnose wiring problems from broken and cut cables to loose wires and crossed
pairs. Less expensive than a network Multimeter, this tester is often all you
need to fix a connectivity issue. Place the Master on one end of the suspect
cable and the Remote on the other end. The light display will show each wire
sequentially. Any sequence problems can be usually be attributed to a crossover
cable in the line. Find the problem and replace with T-568A or T-568B depending
on the installation.

Cable tester

Loopback Plug

A loopback plug can be used to test any port on a PC, router, or
switch. Currently, the loopback plug is most commonly used to test the
operation of a physical network interface card port. The device typically uses
software to send and receive data, thereby validating or invalidating the port.

Loopback plug

Patch Panel

Patch panel wiring closets represent some of the most
challenging situations for a network technician. Every cable, going to every
wall jack in the area, terminates here. In some cases, you will only need to
connect an RJ-45 jack to a numbered port. For others, you will have to run 8
wires to their correct locations on the patch panel. Here is an example:

Patch panel

Punchdown tool

In the image above, each individual wire must be solidly placed
into position. This is where the punchdown tool comes into play.

Punchdown tool

The punchdown tool is designed with a recoil-like mechanism that
firmly punches the wire into position and trims off excess wire. One click and
you’re done.

WiFi Analyzer

WiFi Analyzers are used to discover WiFi problems, but more
importantly are used to help optimize the performance of the WiFi network. They
range from the simplest “How many bars are you getting?” test to multicolor
spectrum analysis of the wireless environment. This tool is a useful diagnostic!

WiFi Analyzers are available for free from your wireless
provider’s site and will run on your smartphone. Keep in mind that wireless
signals are measured in dBm and are always expressed as a
negative value. For example, a -25 dBm signal is stronger than a -90 dBm signal.
Use this device to avoid channel overlap.

That’s it!

That’s all for sub-objective 2.8 which completes Main Domain 2.0 – Networking altogether! We’ll see you in Main Domain 3.0!

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