FTP - 21
TFTP - Trivial FTP
SFTP - Simple FTP   (All file transfers)

SMTP - Simple Mail Transport P (sending) 25
Recieving is POP3 (110) or IMAP4 (143)

SNMP - Simple Network Management P (161) (Run/DXDIAG (Pulls system Info))

HTTP(s) - Hyper Text Transport P (secure) (80, (s)-443)
SSH - secure shell (22)

NTP - Network time P (syncing on 123)

LDAP - Lightweight Directory Access P (389)

DNS - Domain Name Service (53) (Forward and Reverse look-up)

DHCP - Dynamic Host Control P (UDP 67 and 68) (Dynamic, Static, and APIPA)
	- Discover
	- Offer
	- Request
	- DHCPACK

ICMP - Internet Control Message P (block Port 7 to block echo request) (Ping and Tracer)

Telnet - (23) (Gives command line interface) (partially outdated)

DoD Model - Layer 4 - Process/Application
	    Layer 3 - Host-To-Host
	    Layer 2 - Internet
	    Layer 1 - Network Access

1025^ - PC knows it was randomly generated

TCP - (Transmission Control P) Reliable     
UDP (User Datagram P) - Unreliable

TCP/IP Layer 4 

(R)ARP - (Reverse) Adress Resolution Protocol (Gives MAC address for IP) (R - Gives IP from MAC)

NAT - Network Address P (Organization for personal to public IP)