Service	Protocol	Port	TCP/UDP	Tools
"ping", check if node is alive	ICMP	--*	--	ping
World Wide Web	HTTP	80	TCP	browsers
Secure Web	HTTPS	443	SSL/TLS	browsers
Name Resolution	DNS	53	UDP	nslookup
Secure Remote Shell	SSH	22	TCP	ssh (PuTTY)
Remote Desktop (Windows)	RDP	3389	TCP	rdesktop (a UNIX tool)
Secure Remote File Transfer	SFTP	22**	TCP	WinSCP
Dynamic Host Configuration***	DHCP	67/68****	UDP	built in Windows DHCP client, dhclient
Network file & printer sharing	SMB	445	TCP	the file browser's "map network drive"

+ You only need to memorize the ports that are highlighted
* Ping doesn't use the Transport Layer, so there's no associated port
** Same port as SSH because it actually uses SSH
*** Means you can join a network "on the fly" and get assigned an IP Address and find a DNS serverPort
**** 67 is for the server, 68 is for the client