1. Precise the role of the following devices : hub switch and router 2. Define the notion of client/server computing 3. Define the packet switching 4. What is the Internet 5. Define the four layers of TCP/IP model 6. What is the Domain Name System ? 7. What is the role of HTTP? 8. What is Protocol ? 9. What it means security? 10. Identifies the various types of malware 11. What is vulnerability ? 12. What is authentication? 13. What are Botnets ? 14. Define the notion of DDoS 15. Describe the SQL injection attacks 1) how they connect to the Internet (1 Pt) 2) what the two main protocols TCP and IP are responsible (1 Pt) 3) Should managers monitor employee e-mail and Internet usage? Why or why not? (2 Pts) 4) Describe an effective e-mail and Web use policy for a company. (1 Pt)

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Internet

The internet is a group of interconnected computer networks that communicate with devices and networks using transmission control protocol/internet protocol (TCP/IP). The internet forms a vast network by connecting computers all over the world. People can use the internet to share pictures and videos and send or receive data from anywhere. The internet has a vast range of data resources and services, including hypertext transfer protocol secure (HTTPS), electronic shopping, telephone capabilities, file/data sharing, and the worldwide web (WWW).