COMUNICATIONS SYSTEMS AND DIGITAL INFORMATION

1. 1.COMUNICATION SYSTEMS

1.1. Comunications: is the transsmision of information from one place to another.

1.2. Transsmision Protocol:is a set of rules that all the devices in a communication system follow so that they can understand each other and exchange information

1.3. Analogue signal

1.4. Digital signal

2. 2. WIRED COMMUNICATION, WIRELESS COMMUNICATION

2.1. Digital devices

2.1.1. HUB

2.1.1.1. SWITCH

2.2. ROUTER

2.2.1. REPEATER

2.2.1.1. ETHERNET NETWORK CARD

2.2.1.1.1. RJ45 connector

2.3. INFARED

3. 3. NETWORKS

3.1. BAN

3.1.1. PAN

3.1.1.1. LAN

3.2. CAN

3.2.1. MAN

3.2.1.1. WAN

3.2.1.1.1. SAN

4. 4.THE INTERNET

4.1. Standardisation

4.1.1. ISP

4.1.1.1. IP address

4.1.1.1.1. Domain names

4.2. Domain name servers

4.2.1. TCP/IP protocol

5. 5.WEB EVOLUTION

5.1. Web 1.0

5.1.1. Web 1.0

5.1.1.1. Web 3

5.1.1.1.1. Web 3

6. 6.THE POWER OF INFORMATION

6.1. Finding information (Search engine, Hyperlinks, RSS)

6.1.1. Managing information

6.1.1.1. Managing information

6.1.1.1.1. Sharing information (Horizontal social networks and Vertical social networks)

7. 7.USER LICENCES

7.1. Open source

7.1.1. Closed source

7.1.1.1. Free

7.1.1.1.1. Propietary

7.2. Freeware

7.2.1. Public domain

7.2.1.1. Trial

7.2.1.1.1. Demo

8. 8.INTERNET SECURITY MEASSURES

8.1. Privacy

8.1.1. Internet worms

8.1.1.1. Cyberbulling

8.1.1.1.1. viruses

8.2. Lost or stolen mobile phone

8.2.1. Phishing

8.2.1.1. Banners

8.2.1.1.1. Trojan horses