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30 terms

Commonly used network ports/protocols and IP masks/ranges

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FTP (File Transfer Protocol)
TCP Port 20, 21
SSH (Secure Shell)
TCP Port 22
Telnet
TCP Port 23
SMTP (Simple Mail Transfer Protocol)
TCP Port 25
DNS (Domain Name Service)
UDP/TCP Port 53
DHCP (Dynamic Host Configuration Protocol)
UDP Port 67, 68
TFTP (Trivial File Transfer Protocol)
UDP Port 69
HTTP (HyperText Transfer Protocol)
TCP Port 80
POP3 (Post Office Protocol)
TCP Port 110
NNTP (Network News Transfer Protocol)
TCP Port 119
NTP (Network Time Protocol)
UDP Port 123
IMAP4 (Internet Message Access Protocol)
TCP Port 143
SNMP (Simple Network Management Protocol)
UDP Port 161, 162, 10161, 10162
LDAP (Lightweight Directory Access Protocol)
TCP Port 389
HTTPS (HyperText Transfer Protocol Secure)
TCP Port 443
SMB (Server Message Block)
TCP Port 445
L2TP (Layer 2 Tunneling Protocol)
UDP Port 1701
PPTP (Point to Point Tunneling Protocol)
TCP Port 1723
RDP (Remote Desktop Protocol)
TCP Port 3389
TraceRoute
UDP Port 33434-33534(Unix) or ICMP(Windows)
Ping
ICMP (no port)
Class A networks
1.x.x.x - 126.x.x.x
Class B networks
128.x.x.x - 191.x.x.x
Class C Networks
192.x.x.x - 223.x.x.x
Loopback address
127.x.x.x
APIPA Address range
169.254.x.x
Class A Private Networks
10.0.0.0/8
Class B Private Networks
172.16.0.0/12
Class C Private Networks
192.168.0.0/16
IPSec
UDP ports 500 and 4500 and IP Protocol 50