This pertains to the Webview series of Managed switches in the "Linksys By Cisco" line of Linksys products such as the Linksys SRW2024 of SRW248G4 switches. 

First you will need a serial cable.  This is NOT the same cable as the Cisco serial cable (which has DB9 serial on one end and RJ-45 ethernet on the other).  You will just need a straight serial cable and the Windows Hyperterminal application (installed by default on all versions of Windows).

Always work on your computers in well lit areas with no coffee cups or liquids around.  Liquids can destroy your computer if they get spilled on any parts, so try to keep them (and any small children that might spill them) away from your working area. 

Be sure to wear a static strap to help eliminate static electricity which can ruin the delicate electronics inside your computer.  If you don't have a wrist strap, be sure to touch the metal case of the computer frequently to keep yourself grounded and to avoid building up a charge for very long.

I like to use a desk or kitchen table for my work.  That usually provides enough space to spread out the parts that I am working on.

As with most answers "that depends." Most computer users will be fine with a hard drive around 20-3GB.

If you take a lot of digital pictures with a consumer digital camera (ie something that cost less than $700) then you will probably be OK with a hard drive of around 50GB (giga-byte). The same size hard drive is probably fine for people with a fairly large MP3 collection.

 If you are a photography hobbiest and take pictures in RAW (or even know what that means), then you probably need several hundred GB possibly more depending on if you take pictures for a living.

If you want to edit video taken with your camcorder, you will need a LOT of space.  I have a computer with over 2TB (tera-bytes: 1TB = 1000GB) of data to store all of my client's video projects.

RAM stands for "Random Access Memory" and is where your computer stores any program that you are using.  The RAM looses all information when you shut off the power, which is why you have hard drives for long term storage.

 Adding more RAM to your computer may be one of the easiest ways to speed up your computers performance, but this is not recommended on computers more than 5 years old because the performance increase will not be noticed due to the older CPU.

CPU stands for "Central Processing Unit" and is essentially the brains of your computer.  The CPU is usually located right on the motherboard and has a metal fins with a big fan on it.  The CPU fan is probably the loudest thing in your computer (unless there is another problem!).

The CPU is the single biggest source of heat and if not cooled properly can "fry" leading to erradic and unpredictable errors like blue screens or random reboots.  Make sure you clean the CPU frequently.

PSU is short hand for "Power Supply Unit" aka power supply.  The power supply is usually located on the top of the computer case (unless it is a laptop) and is where the big power cord plugs in to the case (the one with three prongs).

The power supply turns the AC power from your house / office into DC current for the various bits inside your computer.

The power supply is one of the most likely parts to go bad and die on a consumer level computer.  Computer manufacturers take short cuts to save money and a cheap power supply is usually thefirst places they cut corners and hope thePC lasts until the warranty expires.

A good power supply can significantly increase the lifetime of your computer, but they come at a cost.

Before getting started, make sure you know what you are trying to do.  Just opening up the case and "fiddling" isn't a good idea.

 If you are trying to install a new part, make sure you know if it is compatible with the other parts of your computer.

 If you arereplacing an existing part, make sure the replacement is compatible with the previous part.IE does the graphics card go in the same slot or is it a different kind?  Does the old hard drive have the same connecting cable as the new one?

But if you are trying to figure out what is "making that loud noise" or solve some other problem, then opening up the case and diving in may be your only option.  WARNING: you can totally mess up your computer if you don't know what you are doing.  Just an FYI.  :-)