HTTP Notes

Organisation of the TCPIP Stack:

• Application Layer: HTTP, DHCP, ARP, DNS
  
• Socket/Transport Layer: TCP, UDP
• Network Layer: ARP, IP
• Datalink: MAC
• Drivers

Stock Quote request sequence example:

1. DNS - UDP query and response
   
2. ARP - L2 query and response
3. Http client - TCP socket open, GET and parse the HTML response

The HTTP query is: http://www.klse-online.com/fetch2.php?stock=ytl

The query and response patterns captured by wireshark below.