This document discusses several key internet protocols including TCP/IP, UDP, DHCP, DNS, SLIP, PPP, IPX/SPX, NetBIOS, HTTP, and how they enable communication and the transfer of data across networks and the internet. It provides an overview of TCP and IP, how protocols like FTP, HTTP, and UDP operate within the TCP/IP model, and how protocols like DHCP and DNS support network configuration and domain name resolution. It also discusses older protocols like SLIP and its replacement PPP, as well as alternative protocols to TCP/IP like IPX/SPX and NetBIOS.

1. Protocol
Protocol
OSI
TCP/IP
TCP/IP
TCP/IP
TCP/IP
TCP/IP
TCP/IP TCP/IP
TCP/IP
TCP/IP
TCP (Transmission Control Protocol)
TCP/IP TCP
Virtual Port

2. IP (Internet Protocol)
TCP/IP FTP (File Transfer
Protocol)
TCP/IP HTTP (Hyper Text Transfer
Protocol)
UDP User Datagram Protocol
TCP/IP UDP
TCP
DHCP (Dynamic Host Configuration Protocol)
IP
5. DNS Domain Name System
IP www.company.com
DNS
DNS IP
WINS (Windows Internet Name Service)
TCP/IP WINS
IP
TCP/IP
Point–to-Point Protocol
TCP/IP
Serial Line Inter
Protocol : SLIP (Point-to-Point Protocol)

3. Serial Line Inter Protocol : SLIP
SLIP TCP/IP
Com UNET
TCP/IP
Sun Microsystems SLP
Berkeley UNIX
TCP/IP
Internet Engineering Task Force (IETF)
SLIP Request For Comments 1005
(RFC 1055) SLIP
SLIP

4. TCP/IP SLIP
SLIP
SLIP
Berkeley UNIX SLIP
SLIP
IP Header Transport Protocol Header
SLIP SLIP
SLIP
SLIP
SLIP IP Address
SLIP IP Address
SLIP
SLIP Protocol TCP/IP
SLIP

5. PPP Point-to-Point Protocol
Point-to-Point Protocol : PPP
PPP SLIP
IP
TCP/IP OSI 7-
Layer Model
PPP Internet Engineering Task
Force (IETF) PPP
Request For Comments 1171 RFC 117
PPP SLIP PPP
SLIP
SLIP
Protocol Stack
Protocol Stack
-
OSI

6. OSI

7. IPX / SPX
IPX / SPX
NetWare
IPX InterNetwork Packet Exchange
Xerox IPX
IPX
SPX Sequenced Packet Exchange
IPX SPX
SPX
NetWare
IPX/SPX IPX/SPX
NetWare
Tunneling
IPX/SPX IP Tunneling
NetWare ICP/IP
TCP/IP
IPX/SPX -
IPX/SPX -
NetBIOS

8. NetBIOS Network Basic input/output System
NetBEUI
NetBEUI
NetBEUI NetBios Extended User Interface
NetBIOS
NetBEUI
NetBEUI
Hypertext Transfer Protocol (HTTP)
Hypertext Markup Language (HTML)
HTTP HTML HTTP
Client Computer Server Computer
HTML
Contents Server Computer Client Computer
Browser

9. HTTP HTML
HTTP HTML
1. Contents
 PC, Macintosh, IBM, DEC,
SUN, HP, SGI, Cray

2. web server
 Web Server PC,
Macintosh, IBM, DEC, SUN, HP, SGI, Cray
 Platform Web Server
3. Client Computer
 Client Computer PC,
Macintosh, IBM, DEC, SUN, HP, SGI, Cray, TV with Set-Top Box, Pen Computer
4. Browser
 Browser PC, Macintosh, IBM,
DEC, SUN, HP, SGI, Cray, TV with Set-Top Box, Pen Computer

10. HTTP TCP/IP
Client Server Request
Server
Web Server Client HTTP
Status Bar
Netscape Netscape 3
Contacting Host 2) Host Connected Waiting for Reply…. 3) Transferring
Data
HTTP WWW Server
Client WWW
Web Server

11. TCP/IP
Transmission Control Protocol (TCP) Internet protocol (IP) TCP/IP
Packet
IP Address E-mail E-mail
Packet
Packets Packets
Packets Packets (Gateway)
Gateway Router
Packets Packets
Gateway Gateway
Gateway
Packets Packets
E-mail

12. Packets
Occupies)
A C Packet
Packet Internet Phone
Packet
IP Address

13. IP Address 32
0
Network Number
Host Number
Class Class Classes
1. Class A Network Number
Class Host Number
2. Class B Network number
Class Network Number Host
Number 65024 Host

14. 3. Class C Network Number 192.0.0.0
223.255.255.0 Class Network Number
Host Number 8
Host Hosts
4. Class D IP Address
244.0.0.0
Domain Name System (DNS)
IP Address
DNS www.nectec.or.th
IP Address DNS
Server Name Server Name Server Request IP
Address