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.