Network fundamentals for beginners

This course’s target and goal is as follows

Target

• IT engineer want to acquire basic network knowledge, “HTTP”, “SSL” especially
• Non-IT engineer want to acquire basic knowledge about network and client-server relationship

Goal

• Understand basic network related knowledge such as HTTP, IP address, NAT, DHCP, SSL, etc.
• Be able to explain how these technologies work in your PC

This course’s table contents is as follows

2 How can we connect to Internet ?

2.1. IX – Internet eXchange –

2.2. Relationship between user’s circuit and server

3 IP address assignment

3.1. IP address – Number to identify each PC –

3.2. How to number IP address

4 IP address used with router

4.1. NAT function included in router

4.2. IP address do not identify client

5 Relationship between domain name and IP address

5.1. Convert server name to IP address

5.2. Hierarchized domain name

6 DNS server – convert between domain name and IP address mutually –

6.1. DNS server to search domain name

6.2. Mechanism to convert from domain name to IP address

7 Port number – avoid communication confusion –

7.1. Secured and unsecured communication

7.2. Port number – to avoid communication confusion –

7.3. Well-known port and ephemeral port

8 Webserver software and HTTP

8.1. HTTP – Hyper Text Transfer Protocol –

8.2. Response from web server

9 SSL for encryption

9.1. SSL – web data encryption –

9.2. Public key cryptosystem

9.3. Public key cryptosystem’s risk and measure

9.4. Common key cryptosystem