Monday, July 21, 2014

Learn VIM editor by playing this game

Learn VIM editor by playing this game:

Improve your typing skiils with this multiplayer game

Improve your typing skiils with this multiplayer game:

Monday, June 30, 2014

Net Neutrality

Net Neutrality means that internet service providers (ISP) do not discriminate what type of data would pass on a higher priority through the network.

A simple explanation video about Net Neutrality:

A more animated explanation:

The concept of Net Neutrality is not new. Some said that this concept is as old as the age of telegraph, on that type of network transporting data. 

End to End Principle say that intelligent decisions like that must be implemented to end points to application layer in the OSI model, not so in the middle of the network. ISPs should only take decisions just at the network layer (layer 3) and lower layers in the OSI model, and not at higher layers by deep inspecting packets of data. But on the other hand, medical services might have to have priority. And there large amount of data that might not be so useful and needs a lot of bandwidth like BitTorrent, video games and high quality videos.

Net Neutrality might make things more complicated if considering all peering agreements between ISPs.

Internet was not always neutral.

Saturday, June 21, 2014

DDoS Attack Global Map

Understanding DDoS attack 

A global map of DDoS attack source and destination locations can be found on this site.

Friday, June 13, 2014

Job Skills Needed as Network Cabling Technician

Cable installer is an entry level job and no need for so much training school before. It is a good play to start your career and you might advance to configuring switches and routers from here. There is no typical job day and even no typical install.

Cable technician job description here.

Monday, June 9, 2014

Using Ping Options

Ping is a very well known command to use in Command Prompt to check if there is a connection to another host in the network (it means you can check if there is an internet connection too). The very frequently host to ping is which is google public dns server.

ping is a normal ping command sending 4 packets of data to google public dns server

ping -t sends unlimited packets of data until stopped and is used to check connection stopping and reappearing over a longer period of time

ping -n allows you specify how many packets of data to send

ping -a shows you that it is pinging google public dns server

ping -f means packets are not fragmented and is used for instance when check if VPN is working

For more info, type ping /?

You can also ping not just by IP address but by site name too: ping, ping or even ping

Inspired from Professor Messer.

Thursday, June 5, 2014

The future of virtualization, cloud and mobile devices

Virtualization, cloud and mobile devices are new things that appeared no long time ago. 

Virtualized servers are now everywhere. Now is comming network virtualization, for instance VMware NSX. Or desktop virtualization from Citrix

Cloud is not so easy to implement everywhere because possible lack of security and availability. For instance in medical environment. 

For enterprise mobiile devices, it is used MDM (Mobile Device Management). This makes possible for mobile devices to be controlled in an organization.

All these are possible future applications.

Building a gaming PC (PCPartPicker video)

This video shows a gaming PC is built. Pre applied thermal paste on heatsink that makes the connection with the CPU.

Privacy filter for laptop or computer display

Restricted angled view. You may secure your laptop or computer display not allowing the guy near you to see what's on your screen. 

Wednesday, June 4, 2014

You may have your own webserver wiith Dynamic DNS

By updating your DNS provider with your DNS settings, you may host your own web server.

Thin client

Thin client, when no so many resources needed for client but needed for the server accessed by the client.

Different types of displaying for computer's output

Showing information on the screen was made in different ways along the time. From old to new display devices, from less performant to more and more performant.

Tuesday, June 3, 2014

In what country do you plug in your computer's power supply?

If you take your computer or computer's power supply from USA to Europe, verify the value of voltage that comes from the power outlet from Europe countries. It might damage your PSU.

Heatsink role inside a computer

Using heatsink as an intermediate cooling level between heat source (CPU) and outside air.

Internet of things

Internet of things means adding a lot of smart and connected objects to the internet to be remotely controlled. Designing them means designing objects themselves, web design and app design for phone.

Monday, June 2, 2014

Embedded GPU in CPU

GPU embaded in modern CPU might bring enough performance, no need for separate graphic card if no need for gaming, video editing and so on.

Tuesday, May 27, 2014

Might get hacked by so called tech support when clicking scam ads

It is like when you let a stranger to come in your house after calling him to fix your broken stuff.

Monday, May 26, 2014

Software vs hardware based RAID

Hardware based RAID controller brings higher performance then software based RAID. Software based RAID has to use system's CPU resources.

One computer on a stick

Keepod is a solution for poor people that each user to have their own computer in a USB stick. Separating hardware from software, it is possible to boot an operating system from a USB stick. What is needed more is a refurbished PC.

Saturday, May 24, 2014

Old use and new use of SCSI

Used in old days as a storage interface, now came back in use in virtual environments connecting virtual drives. Intelligent interface.

Using Oculus Rift and Drone to feel like flying

If you combine Oculus Rift to look in any direction with a drone from where you virtually see with Oculus Rift it is like real flying experience.

Friday, May 23, 2014

Smart glasses for surgeons

Smart glasses like Google Glass might be used by surgeons in operating theater to present live operations to students or communicate with experts and ask for advice while live surgery. 

Saturday, May 17, 2014

Reducing interference brings better data speed

On PATA by adding 40 more ground wires to reduce crosstalk brings better speed. There is more interference reduction on SATA and speed is increased even it it is serial connection.

Friday, May 16, 2014

Hot swappable drives

Swapping drives while machine running just by disconnecting the operating system

Tuesday, May 13, 2014

Storage devices

SATA - serial more speed then parallel data transmission 
Solid State Drive - the new faster and no movable parts storage drive but more expensive now, perhaps cheaper in the future
Blue-ray Disk - huge space these days on optical disks
If you have no floppy drive, on your PC, but you have to get data from a floppy disk, you can buy a USB connected floppy drive
Tape drives used now for backup, no as a tape recorder or for cassette deck like in the past

Saturday, May 3, 2014

Mysterious videos appeared on youtube.

There are a lot of mysterious videos that appeared on youtube.

The process of creating sophisticated integrated circuits from design through manufacturing process to the final product.

Monday, April 28, 2014

Showing different types of motherboard and explaining them. How to build a computer for a particular purpose. Motherboard form factors. Explaining about components that connect with motherboard like CPU and cooler, memory or storage device. Unboxing and installing motherboard.