Ports Flashcards
FTP
TCP; Port 21 (File Transfer Protocol)
SSH, SCP, SFTP
TCP/UDP; Port 22 (Secure Shell)
Telnet
TCP/UDP; Port 23 (Unencrypted method to remotely administer network devices (should not be used))
SMTP
TCP; Port 25 (Simple Mail Transfer Protocol is used to send email over the Internet)
DNS
TCP/UDP; Port 53 (Domain Name Service is used to resolve hostnames to IPs and IPs to hostnames)
TFTP
UDP; Port 69 (Trivial FTP is used as a simplified version of FTP to put a file on a remote host, or get a file
from a remote host)
HTTP
TCP; Port 80 (Hyper Text Transfer Protocol is used to transmit web page data to a client for unsecured web
browsing)
Kerberos
UDP/TCP; Port 88 (Used for network authentication using a system of tickets within a Windows domain)
POP3
TCP; Port 110(Post Office Protocol v3 is used to receive email from a mail server)
NNTP
TCP; Port 119 (Network News Transfer Protocol is used to transport Usenet articles)
RPC/DCOM-scm
UDP/TCP; Port 135 (Remote Procedure Call is used to located DCOM ports request a service from a program on another computer on the network)
NetBIOS
UDP/TCP; Port 137-139 (NetBIOS is used to conduct name querying, sending of data, and other functions over a
NetBIOS connection)
IMAP
TCP; Port 143 (Internet Message Access Protocol is used to receive email from a mail server with more
features than POP3)
SNMP
UDP; Port 161 (Simple Network Management Protocol is used to remotely monitor network devices)
SNMPTRAP
UDP/TCP; Port 162 (Used to send Trap and Inform Requests to the SNMP Manager on a network)