Layer 7 Models


How DHCP clients process incoming packets

When a DHCP client device receives a packet:

 

 

How DHCP servers process incoming packets

When a DHCP server device receives a packet:

 

 

How TELNET client processes work

 

When a TELNET client receives a packet (flowchart here):

 

 

How TELNET server processes work

When a TELNET server receives a packet (flowchart here):

 

 

How DNS works

When DNS client needs to find the IP address of a domain name:

 

When a DNS server device receives a packet (flowchart here):

 

 

How HTTP works

When a client needs to find a webpage from a server:

 

When a HTTP client receives a packet (flowchart here):

 

When HTTP server receives a request (flowchart here):

 

 

How TFTP servers process incoming packets

When a TFTP server receives a packet (flowchart here):

 

 

How TFTP servers and clients process incoming packets during a session

When a TFTP server or client receives a packet during a session (flowchart here):