2 TERM

The second term of I/T has been a little difficult because we have studied another things more important and complicated than the things that we studied in the first term.
First, we studied how to transform numbers from decimal to binary code. We studied this because we had to understand the language of a computer.
Second, we have worked in a photocopies about networks that Javi gave to us:
- First, we saw the meaning of networks, Internet, Transmission medium, server and client, connection devices and protocol.
- Second, we studied more deeply the transmission mediums and how to connect a type of cable called "par trenzado", how to do it and some of my partners did a demostration.
- Third, we studied de connection devices, like the network interface card, the hub and the switch, the router and the modem.
- Then, we saw the types of networks there are, clasificated by:
* The distance: PAN (Personal Area Netowork); LAN (Local Area Network); CAN (Campus Area Network); MAN (Metropolitan Area Network) and WAN (Wide Area Network).
* The type of connection: by cable or without the cable.
* The relation between the computers: client - server where the client needs something and the server give the thing, and P2P (Peer to Peer) where all the computers are clients and servers.
* The topology of the network: bus (all the computers connected); star (all the computers connected to one computer); ring (one computer connected to the other and the last to the first); mesh (all the computers connected to the others), tree (like a star but with shape of a tree) and mix (a combination of the others).
* The direction of the data: unnidirectional, bidireccional but no at the same time and bidirectional at the same time).
- In fifth place, we studied the protocol TCP/IP (Internet protocol), the IP adress, the subnet mask, the protocol DHCP and the configuration of a network.
- In the last place, we studied the informatic security and the internet security. In the internet security we saw the types of problems there are:
- Viruses and worms.
- Spywares.
- Trojans.
- Emergents windows.
- Spams.
- Cookies.