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

Satellites were launched last week

f3dba3be-8a5f-415b-a2bc-0a7043c71d98-image.png

@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

@connorsoliver said in An Overview of Storage Devices - CompTIA A+ 220-901 220-902 Video Training by Prof. Messer:

What did he mean when he said there's only a limited number or writes on a USB flash drive.

So this is a small mistake on the A+ material. They are making assumptions about the storage media based on the communications protocol. But it's based on very common things. A standard USB flash drive using a flash memory technology that "wears out" as you write to it, but essentially never wears out as you read it.

So the way that a USB stick is "meant to be used" is that you store things on it and read it a lot. You can change it, but it isn't meant for constant writes.

So under "normal" use, USB sticks last a long time. But it you write to it constantly (like when using it as swap) you will cause the memory chip(s) to die quickly.

@connorsoliver I went on an image search of motherboards this morning. The Asus 99 deluxe only has a south bridge if you want to take a look.

@connorsoliver said in CPU Sockets - CompTIA A+ 220-901 220-902 Video Training by Prof. Messer:

Is the LGA or PGA configuration more common in CPUs?

LGA is more common. And getting even more common in the future.

@connorsoliver I was wondering the same thing. I know we can download equivalents on our phones, but didn't think it was an option on the BIOS.

@mary said in BIOS Configurations - CompTIA A+ 220-901 220-902 Video Training by Prof. Messer:

If your graphics card was failing would that show up in the diagnostics as well? This will be a great tool if you suspect hardware failure. As to the fake BIOS, if you make changes in the virtual environment will it show you a reflection of those changes?

Depends on the diagnostics. As external hardware, diagnostics of it tend to be more limited.

@Pete-S said in BIOS and UEFI - CompTIA A+ 220-901 220-902 Video Training by Prof. Messer:

@travisdh1 said in BIOS and UEFI - CompTIA A+ 220-901 220-902 Video Training by Prof. Messer:

@Pete-S How long did you spend holding UV lights over those chips? Me = many hours, way to long.

Haha, spent a lot of time doing that. But I had an UV eraser which basically meant you could put it in and walk away.

I spend enough time doing it so I could immediately tell that the EPROM I posted a pic of above, is made by Texas Instruments (from the logo) and it's 256 kbit (from 27C256) so 32 kilobyte memory.