Port Numbers Flashcards
TCP/ 20
TCP/ 21
File Transfer Protocol
20 is for data transfer
21 is used to control data transfer
Usually requires authentication username/ password
TCP/ 22
SSH- Secure shell
Connect to remote device using terminal has text based front end.
Encrypted communication link.
TCP/ 23
Telnet
TCP/ 23
Connect to devices remotely
In the-clear communication
Not encrypted
TCP/ 25
SMTP - simple mail transfer protocol
Used to send mail from device to server
-commonly configured on mobile devices and email.
Udp/ 53
DNS - domain name system
Coverts name to IP address
Udp/ 67
Udp/ 68
DHCP - Dynamic Host Configuration Protocol
Automated configuration of IP address subnet mask and other options.
-requires dhcp servers
TCP 80
Http Hypertext Transfer protocol
Web server communication
TCP/ 443
HTTPS - hypertext transfer protocol secure
Web server communication that’s encrypted
TCP/ 110
Pop3 -post office protocol version 3
Receive email from single client
TCP/ 143
Imap4 - internet message access protocol v4
- management of email inboxes from multiple clients
Udp/ 137
SMB - server message block
NetBIOS name service
Finds devices on network by the name.
TCP/ 139
SMB - server message block
NetBIOS session service
Used to set up session and transfer data between devices.
TCP/ 445
NetBIOS-less
-direct SMB communication over tcp without the NetBIOS transport.
UDP/ 161
SNMP - simple Network management protocol
Gather statistic from network devices
Queries udp/ 161
Udp/ 161
SNMP- simple Network management protocol
Udp/ 161 is Traps information sent back from network devices
