Port 20: FTP data transfer Port 21: FTP control Port 22: Secure shell (SSH) Port 25: Simple mail transfer protocol (SMTP) Port 53: Domain name system (DNS) Port 80: Hypertext transfer protocol (HTTP) Port 110: Post office protocol v3 (POP3) Port 113: Authentication service/...

Overview On Private IP Address 10.0.0.0 through 10.255.255.255 169.254.0.0 through 169.254.255.255 172.16.0.0 through 172.31.255.255 192.168.0.0 through 192.168.255.255...

Which Network Device Work Which OS Layer ? Hubs : Hubs Network Device operate at Psychical Layer. Switches : Switches Network Device operate at Data-Link Layer. Bridges : Bridges Network Device operate at Data-Link Layer. Routers : Routers Network Device operate at Network Layer. ...

OSI model networking ...