@brianwinkelmann said in Troubleshooting Common Hardware Problems - CompTIA A+ 220-1001 Prof Messer:

@scottalanmiller but that was the red light that indicates that the CPU is not working.

I suspect that there is a speaker there, too. Just no beep codes from that machine. Look up the specific motherboard to see if it has beep codes.

@scottalanmiller You can also use a website for this. I have some private pages on my website where i list things I need to look up occasionally. They aren't secret details or anything but just key things I did for this software or how I helped this user. That kind of stuff.

Very Interesting!

Very interesting to know that there are many services in the cloud.

@jmoore said in Cloud Models - CompTIA A+ 220-1001 Prof Messer:

@mary said in Cloud Models - CompTIA A+ 220-1001 Prof Messer:

@scottalanmiller so cloud is a buzzword?

Oh yes I used to see commercials with a kid talking about the "Almighty Cloud". This was several years ago but not much has changed in the marketing.

It's absolutely used wrong all the time, but that doesn't make cloud a buzz work, cloud is a real specific thing, but almost no one uses it correctly.

Interesting but also I get confused with all the comments XD

@brianwinkelmann said in Storage Devices - CompTIA A+ 220-1001 Prof Messer:

I am seriously thinking about buy a SSD drive to install on my old computer that is Pentium 4 - 3.0 GHz, 3 GB RAM, with Windows XP and install there the Windows 10 so it can run faster, Do you think that is a crazy idea?

Yes, it's crazy. Even if you can get a $30 SSD like we can from Amazon here in the US (small WD Green drive), it's not worth putting $30 into a computer worth at best $5.

Pentium 4 wasn't just a 32bit processor, it was a really, really slow 32bit processor. It was so bad that they had to bring the Pentium 3 back with a new name to keep their products alive while they figured out what to do. It's considered the worst processor ever made (that got actually sold.) And with only 3GB of RAM, it doesn't have anything there going for it, either.

It's only $55 if you shop around to get a quad core, 64bit, 8GB RAM Raspberry Pi. If you are going to talk about adding an SSD to something, start with at least that.

@JaredBusch said in Network Types - CompTIA A+ 220-1001 Prof Messer:

@scottalanmiller said in Network Types - CompTIA A+ 220-1001 Prof Messer:

@JaredBusch said in Network Types - CompTIA A+ 220-1001 Prof Messer:

@scottalanmiller said in Network Types - CompTIA A+ 220-1001 Prof Messer:

@connorsoliver said in Network Types - CompTIA A+ 220-1001 Prof Messer:

How common is MAN?

It's just a term. One that they thought would be common, but isn't. Really no one used it and it's just silly. LAN and WAN still describe all of the real types that matter. The idea of a MAN is kind of meaningless. So while they kind of exist regularly, no one talks about them.

It is also implied that it is something managed by the ISP (aka telcos back when it was a term actually used).

Used to imply, yeah. Today it is often down by owned wireless. But the first MAN I worked on was one we built privately in DC. No telecoms involved. That was early 2000.

First one I worked with was in some Citibank offices in the mid-late 90's in St. Louis. Telecoms involved only as far as providing the clean pairs of copper. Otherwise, Citi did it all themselves also.

I was similar. AT&T provided the fiber in case, but we managed everything else.

@scottalanmiller said in Internet Connection Types - CompTIA A+ 220-1001 Prof Messer:

Satellites were launched last week

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@scottalanmiller said in Internet Connection Types - CompTIA A+ 220-1001 Prof Messer:

Satellites were launched last week that should be a total global game changer.

Those 60 are not going to do that. They do not have the point to point lasers for relay. These are all still engineering tests that have to relay all communications through ground stations.

@scottalanmiller said in Using IP Addresses - CompTIA A+ 220-1001 Prof Messer:

@connorsoliver said in Using IP Addresses - CompTIA A+ 220-1001 Prof Messer:

When using an SSL VPN, if the VPN concentrator decrypts the data being sent, wouldn't it be possible for someone to capture the data and also decrypt it?

Possible, sure. But very, very hard. The VPN concentrator has the keys, someone intercepting the traffic presumably does not. The point of VPN encryption is to make it so hard to decrypt the data that you don't care if they see it. It's about making something safe enough that we assume we will send it in the open and not worry.

So we assume that people capture that data constantly - but we have made it so hard to use, that they can't do it.

We more than assume that - we pretty much know the NSA is doing that after the Snowden leaks.

Cool very interesting!

Interesting

@Osvaldo said in Wireless Network Technologies - CompTIA A+ 220-1001 Prof Messer:

I wonder if there is a tool for radio hacking zigbee?

Many of the devices that use the protocol are never updated, therefor quite a large target for hacking.

The radio protocol itself I doubt is much use to "hack" (Any cheap software defined radio will be able to imitate a Zigbee device.)

I made this safe for work

test.png

Done with this one!

@Dashrender said in Installing a SOHO Network - CompTIA A+ 220-1001 Prof Messer:

@scottalanmiller said in Installing a SOHO Network - CompTIA A+ 220-1001 Prof Messer:

@Dashrender said in Installing a SOHO Network - CompTIA A+ 220-1001 Prof Messer:

@scottalanmiller said in Installing a SOHO Network - CompTIA A+ 220-1001 Prof Messer:

Think about a thermostat that you can connect to online. The thermostat IoT device is in your home. The IoT vendor has a server. You work with the thermostat through the hosted server somewhere. If that server was compromised, bad guys could run up your AC bill.

To bad most cameras don't work that way - instead they use uPNP to open ports and just spew your video feeds to the world.
https://www.insecam.org/

"Most" of anything is crap. No good camera does that. What a bizarre system.

Agreed - but it's very likely type of equipment they'll run into out in the wild.

I've never seen that with a client in the wild. I'm sure it happens, but it's not something we really run into. Common with home users, for sure. As business class routers don't allow that, it limits it in the field a lot.

And it's not like we don't see cameras, worked with a security company just today!

Also, lots of customers on cheaper or less "business" equipment often have double NAT which while awful, stops UPnP.

Done with this one too! Reading the comment section : - )

@scottalanmiller ahhhh the S.A.M.

One of the clear problems with the CompTIA A+ has always been that it clearly caters to promoting Microsoft products and not being vendor neutral as it has always claimed to be. With the latest release, literally half of the exam is Windows only. There is no section for macOS, any Linux, iOS, Android, Chromebooks, nothing, nada. It's become a Windows exam, which means that they don't just skip the underlying principles that they claim the exam is about, and skip the neutrality for the industry that they claim it is about, but they also leave people going into entry level positions totally unprepared for the real world where running into non-Windows OSes is common. If you were learning from nothing but the A+, you might not even be aware that non-Windows exists. Let alone non-PC hardware, which appears to also be completely skipped.

This was very informative, I like the simplicity of the explanations. Also @scottalanmiller thanks for the extra feedback! I watched this a week ago btw