1. Assumption You’re not a “networking guy” and you don’t want to be Networking infrastructure is configured properly – Packets go where they’re told to go Steve Evans – scevanscg.com

2. Ports TCP (Transmission Control Protocol) – State, Handshake, Confirmed UDP (User Datagram Protocol) – Stateless, No Confirmation Numbers – 1-1023 Well Known 80 = HTTP, 443 = HTTPS, 25 = SMTP, 53 = DNS – 1024-49151 Registered http://www.iana.org/assignments/port-numbers – 49152-65535 Dynamic Steve Evans – scevanscg.com

3. Ports DEMO – Telnet – NMAP (http://nmap.org/ )http://nmap.org/ Steve Evans – scevanscg.com

4. Sniffing Packets DEMO – Wireshark (http://wireshark.org/ )http://wireshark.org/ Read web page Send Email Steve Evans – scevanscg.com

5. ns1.comp.com server1.comp.com? 10.0.0.15 Name Resolution Steve Evans – scevanscg.com

6. ns1.comp.com blog.scevanscg.com? 67.205.50.110 Root NS.com?.com NS scevanscg.com? scevanscg.com NS blog.scevanscg.com? 67.205.50.110 Steve Evans – scevanscg.com

7. ns1.comp.com www? 10.0.0.16 Suffix Search List: comp.com scevanscg.com Does not exist www.comp.com? Steve Evans – scevanscg.com