1. Protocols and networks in the TCP/IP model initially.
Reference Models
Protocols and networks in the TCP/IP model initially.

2. Reference Models Physical Layer / Data Link Network Layer
mechanical, electrical, and timing interfaces to the network
algorithms for reliable, efficient communication between two adjacent machines
Network Layer
getting packets form the source all the way to the destination (end-to-end transmission)
The Transport Layer
reliable, cost-effective data transport form the source to the destination machine, independently of the physical network
The Application Layer
programming that does a real work for users
determines the presentation of the data and controls the session

3. Connection Establishment (Transport Layer)
How a user process in host 1 establishes a connection with a time-of-day server in host 2.

4. The Application Layer Domain Name System Electronic Mail WWW other
The DNS Name Space
Resource Records
Name Servers
Electronic Mail
The User Agent
Message Transfer
Final Delivery
WWW
other

5. A portion of the Internet domain name space.
The DNS Name Space
A portion of the Internet domain name space.

6. A portion of a possible DNS database for cs.vu.nl.
Resource Records
A portion of a possible DNS database for cs.vu.nl.

7. Part of the DNS name space showing the division into zones.
Name Servers
Part of the DNS name space showing the division into zones.

8. How a resolver looks up a remote name in eight steps.
Name Servers (2)
How a resolver looks up a remote name in eight steps.

9. Electronic Mail Agent Transfer Final Delivery any interface for e-mail
SMTP; simple mail transfer protocol – TCP connection to port 25 for simple ASCII protocol.
Final Delivery
POP; post office protocol; ‘pop’ the message from server
IMAP; internet message access protocol; multiple features – creating and desrtoying mailboxes…
Webmail; mail through browser

10. A comparison of POP3 and IMAP.

11. The World Wide Web Static Web Documents Dynamic Web Documents
HTTP – The HyperText Transfer Protocol

12. URLs – Uniform Resource Locaters
Some common URLs.

13. Statelessness and Cookies
Some examples of cookies.

14. HTML – HyperText Markup Language
(b)
(a) The HTML for a sample Web page. (b) The formatted page.

15. Multimedia Introduction to Audio Streaming Audio Internet Radio
Introduction to Video
Video on Demand