What are the Ports?

Port

In computer networks, a port is logically a set of network services or a code that provides communication over TCP/IP protocol suite which listens to various sorts of requests in networks while communicating locally or over the internet. Likewise, we could have hardware ports as well which connects different devices to each other. So, every protocol has some specific port or a range in which a port could bind if multiple applications are going to use the same port. There are a number of ports in networks, some of them are as below_

1 - DNS - 53

2 - DHCP Client - 68

3 - DHCP Server - 67

4 - RDP - 3389

5 - LDAP - 389

6 - FTP Server - 20

7 - FTP Client - 21

8 - SSH - 22

9 - Telnet                 - 23

10 - SMTP         - 25

11 - HTTP - 80

12 - HTTPS - 443

13 - POP3 - 110

14 - IMAP - 143

15 - UDP - 0 - 65535

16 - TFTP - 69

17 - GC (Global Catalogue) - 3268

18 - Kerberos - 88

19 - SMB - 445

20 - LDAP On SSL - 689

21 - SNMP - 161

This number will keep going until you keep learning from computerflicks.