FTP
FILE TRANSFERS
SNMP
MANAGES DEVICES ON IP NETWORKS
SSH
CONNECTS TO TERMINALS
TELNET
CONNECTS TO TERMINALS (UNSECURE)
TFTP
TRIVIAL FILE TRANSFERS (LESS SECURE)
SMB
PROVIDES SHARED ACCESS TO FILES, PRINTERS, AND PORTS
RDP
REMOTE DESKTOP
DHCP
GIVES OUT IP ADDRESSES
DNS
RESOLVES NAMED AND IP ADDRESSES
HTTP
PORT FOR WEB PAGES
HTTPS
SECURE PORTS FOR WEB PAGES
NETBIOS
ALLOWS APPLICATIONS TO COMMUNICATE
POP3
INCOMING EMAIL
IMAP
INCOMING EMAIL
SMTP
OUTGOING EMAIL
SIP
AUDIO/VIDEO CONFERENCING
MGCP
TEXT BASED SIGNALING OVER VOIP
RTP
TRANSPORT REAL TIME DATA
H.323
ADDRESSES CONTROL OVER CALLS