Cheatsheet: Difference between revisions
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= Flows =
*Complete Flow of PC opening a Website:
#Check NW config
#DHCP if not configured
#Check Domain name in Browser Cache
#Check Domain name in OS Cache
#If not Found in any cache, Prepare to send UDP DNS query to DNS Server
#If DNS Server configured is in same Network Check MAC address in ARP Table
#If not found, send ARP for MAC Address
#Forwards DNS Query to DNS Server and wait for reply containing IP address of Website
#If DNS server configured is not in same subnet, check Gateway config(IP & MAC address)
#If MAC address not found in ARP Table, send ARP request
#After getting reply, fwd the DNS query to gateway
#After getting DNS response, start TCP 3-way handshake S-SA-A.
#Start SSL Handshake if SSL/TLS configured
#Send GET Request
#Client sends ACK & Body containing HTML Data
#If HTTP 1.0, Server sends FIN & CLoses connection
#Client send FIN-ACK
#Server sends Ack
*Complete Flow of DNS Traffic
*Complete Flow of Traffic passing through below scenario:
[PC]-----[Hub]-----[Switch]-----[Router]------[Router]------[Server]
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