20 common ports

1. ShamsaAl Mazrooei
10BG

2. » A standard protocol for transferring files
between computing systems.
Assigned to port 20 and to port 21 (mostly
uses port 20).

3. » An encrypted version of FTP, which uses
Secure Shell (SSH).
Assigned to port 22.

4. »The protocol used to transfer email from a
client to an email server; it is also used to
transfer email between servers.
Assigned to port 25.

5. . »The protocol used by clients to retrieve email
from servers.
• Assigned to port 110. Common ports and
protocols.

6. Technology In actuality, SSL should no longer be
used.
• Assigned to port 443. Common ports and protocols.

7. » A protocol used by clients to access email on
email servers. Allows the client to organize
email on the server into folders.
Assigned to port 143

8. »The primary protocol used to transfer data
over the Internet.
Assigned to port 80.

9. »The primary protocol to securely transfer data
over the Internet using SSL (Secure Socket
Layer) or

10. »The protocol that is used to map computer
names to their IP addresses (e.g.,
www.google.com to 74.125.28.104).
• Assigned to port 53.

11. » Used in Microsoft networks by Remote
Desktop Connection and Remote Assistance
to make remote connections.
• Assigned to port 3389.

12. – DHCP (Dynamic Host Configuration
Protocol).
»The protocol used within networks to
automatically configure computers with the
correct IP configurations (e.g., IP address,
subnet mask, default gateway, and DNS
server location).

13. .
– SMB (Server Message Block).
» A protocol used to transfer files over a
network; the process is transparent to the
user.
• Assigned to port 445. Common ports and
protocols.

14. »The protocol used for accessing and
maintaining distributed directory information
services (e.g., Active Directory Domain
Services).
• Assigned to port 389

15. » A protocol used to monitor and manage local
area networks.
• Assigned to port 161.

16. » A protocol used to share files across intranets
(internal private networks) and the Internet.
• Assigned to port 3020.

17. » A protocol used for remote access to systems;
it is unsecure. It is a bi-directional terminal
service.
• Assigned to port 23.

18. » A protocol used to encrypt data traffic on a
network.
• Assigned to port 22.