Just a small bit from the CEH
Scanning
Foot printing
Dumpster diving
Enumeration
Rooting
Scanning
Social engineering
Enumeration
Foot printing
7
5
10
3
Discover open ports
Uncover services on ports
Detect operating system
Unearth initial information
Locate the network range
Nmap
Sam Spade
Ethereal
Netcat
EDGAR
WHOIS
ARIN
NSLOOKUP
Visual Trace
Visual Route
GeoTrace
Tracert
NetDetect
Nmap
VisualLookout
Sam Spade
Snort
VisualRoute Mail Tracker
Mailtracking.com
Sam Spade
EMailTrackerPro
War dialers
DoS Scripts
Netcat
Trojan horses
Ping utilities
Dialnet
Snort
THC-Scan
ToneLoc
Icmpenum
Genius
BlackICE
Netscan Tools
Hping
UDP scan
Strobe scan
Vanilla scan
Sweep scan
Half-open scan
Null scan
Xmas scan
Open scan
Xmas
Closed
Open
Full
Relay
Peer to peer
Transfer
Transport
Tunnel
Netscan Tools Pro
Superscan
Nmap
IpEye
OS ID
OS fingerprinting
OS scanning
OS investigation
Sniffprinting
Passive fingerprinting
Packet fingerprinting
Open fingerprinting
Wait!
Here's an interesting quiz for you.