Important Port Numbers for 220-1001 A+ Core 1 Flashcards
20
FTP — File Transfer Protocol
data transfer
TCP
21
FTP — File Transfer Protocol
control
TCP
22
SSH — Secure Shell
used for secure logins, file transfers (SFTP),
port forwarding
TCP
23
Telnet
used to access remote devices with no encryption
TCP
25
SMTP — Simple Mail Transfer Protocol
used for sending email
TCP
465
SMTP — Simple Mail Transfer Protocol
used for sending email
port is secure using SSL
TCP
587
SMTP — Simple Mail Transfer Protocol
used for sending email
port is secure using TLS
TCP
53
DNS — Domain Name System
translates domain names to IP addresses
TCP/UDP
67
DHCP — Dynamic Host Configuration Protocol
used to assign IP addresses to network hosts
Client (68) communicates to Server (67)
UDP
68
DHCP — Dynamic Host Configuration Protocol
used to assign IP addresses to network hosts
Server (67) communicates to Client (68)
UDP
69
TFTP — Trivial File Transfer Protocol
used for sending a file from the server to the client
UDP
80
HTTP — Hypertext Transfer Protocol
standard for communication on the web,
used to render pages in web browsers
TCP/UDP
443
HTTPS — Secure Hypertext Transfer Protocol
secured communication on the web SSL/TLS
TCP
110
POP3 — Post Office Protocol 3
used for receiving email
TCP
995
POP3 — Post Office Protocol 3
used for receiving email
port is secure TLS/SSL
TCP
123
NTP - Network Time Protocol
enables switches, routers, firewalls, servers,
and workstations to determine and synchronize the clocks for each device
137
NetBIOS/NetBT — Network Basic Input Output System
allows applications on different computers to
communicate within a local area network (LAN)
Name Service
TCP/UDP
139
NetBIOS/NetBT — Network Basic Input Output System
allows applications on different computers to
communicate within a local area network (LAN)
Session Service
TCP/UDP
138
NetBIOS/NetBT — Network Basic Input Output System
allows applications on different computers to
communicate within a local area network (LAN)
Datagram Service
TCP/UDP
143
IMAP — Internet Message Access Protocol
used for receiving email
TCP
993
IMAP — Internet Message Access Protocol
used for receiving email
port is secure SSL
TCP
161
SNMP — Simple Network Management Protocol
used to send and receive
network management messages
Agent for Sending and Receiving
UDP
162
SNMP — Simple Network Management Protocol
used to send and receive
network management messages
Management for Receiving Traps
TCP/UDP
389
LDAP — Lightweight Directory Access Protocol
used to access a directory on network objects
TCP/UDP
636
LDAPS - Lightweight Directory Access Protocol Secure
used to access a directory on network objects over SSL
TCP/UDP
445
- *SMB — Server Message Block**
- *(CIFS - Common Internet File System)**
provides shared access to files, printers, and
serial ports on a network
TCP
548
AFP — Apple Filing Protocol
used for Apple file services
TCP
3389
RDP — Remote Desktop Protocol
used to connect to remote computers
TCP/UDP
990 or 21
FTPS - File Transfer Protocol over SSL
FTPS requires a server certificate for SSL authentication through user ID and password.
Requires port 21 or 990 as command and control;
and a range of ports 2000 through 2500.
49
TACACS
88
Kerberos
989, 990
FTPS
File Transfer Protocol over SSL/TLS
1433
Microsoft SQL Server
1723
PPTP
Point-to-Point Tunneling Protocol
1701
L2TP
Layer 2 Tunneling Protocol - UDP
1812
RADIUS
