Port Numbers Flashcards
1
Q
HTTP
A
Port 80 - Web browsing (insecure)
2
Q
HTTPS
A
Port 443 - Secure web browsing
3
Q
FTP
A
- Port 20 (Data)
- Port 21 (Control)
4
Q
SFTP
A
Port 22 - Secure FTP (uses SSH)
5
Q
SSH
A
Port 22 - Secure remote access
6
Q
Telnet
A
Port 23 - Remote command-line (insecure)
7
Q
SMTP
A
Port 25 - Sending email
8
Q
POP3
A
Port 110 - Receiving email (downloads messages)
9
Q
IMAP
A
Port 143 - Receiving email (syncs messages)
10
Q
RDP
A
Port 3389 - Remote Desktop Protocol (Windows)
11
Q
DNS
A
Port 53 - Domain name to IP address resolution
12
Q
DHCP
A
- Port 67 (Server)
- Port 68 (Client)
13
Q
SNMP
A
Port 161 - Network management and monitoring
14
Q
LDAP
A
Port 389 - Directory services (Active Directory, etc.)
15
Q
SMB / CIFS
A
Port 445 - File sharing on Windows networks
16
Q
NetBIOS
A
- Port 137 (Name services)
- Port 138 (Datagram)
- Port 139 (Session)
