Some important port numbers?

Some important port numbers

 

There are huge number of ports which are reserved. But the ports mentioned below are more important.

IMPORT PORTS:

20-FTP Data

21-FTP Control

23-Telnet

25-SMTP

53 -TCP

69 -TFTP

80 -HTTP/WWW

109-POP2

110-POP3

123/UDP-NTP

137-NetBIOS

443-HTTPS

546-DHCPv6 client

547-DHCPv6 server

Friends if you feel still there are some ports which are more important. You are welcome to update it.

Thanks

Share Knowledge

Share Knowledge
Share Knowledge

Comments 18 comments

kapil 7 years ago

Port 53 is for TCP or for DNS ??

Thank you in advance...


karthickjck profile image

karthickjck 7 years ago from Bangalore Author

Its for DNS


sandy 6 years ago

why we r useing port numbers pls reply me


karthickjck profile image

karthickjck 6 years ago from Bangalore Author

Ports are used to identify the type of service out of junk traffic.

Thanks

Karthick Murugan


sai 6 years ago

22-ssh

secure shell


PABITRA DEKA 6 years ago

(2049 NFS) (520 RIP) (161 SNMP)(143 IMAP4)


Peggs 5 years ago

3389- Remote Desktop Protocol.


Belal Ahmad 5 years ago

67-68 for DHCP, 995 pop3(over ssl),


parvvee 5 years ago

dude,

Please remember one more thing

most of the protocols uses port number only in the transport layer

not in the other layers

for example say icmp

it wont use port number

most of the technical interviewers try to target u at these sort of things


jayadev 4 years ago

what is the port no. for firewall


karthickjck profile image

karthickjck 4 years ago from Bangalore Author

Firewall is hardware and it doesn't use any specific port. They are used to block/unblock ports.


G LOKESH YADAV 4 years ago

The PORT NUMBER OF KERBEROS IS 88


RaviKiran 4 years ago

hello boss.can you explain me what is firewall and what is software firewall and what is hardware firewall...?


Reghu 4 years ago

Thanks karthickjck...can u send me interviwew questions in Networkin..reghuj02@gmail.com


Yogesh 4 years ago

(i) Web Server (ii) Mail Server ????


shailesh 4 years ago

port num of PING?


53 is for DNS 4 years ago

Hey MAD Guys.. 53 is a port used by DNS


karthickjck profile image

karthickjck 3 years ago from Bangalore Author

Echo Protocol is the underlying protocol behind PING and the port number is 7

    Sign in or sign up and post using a HubPages Network account.

    0 of 8192 characters used
    Post Comment

    No HTML is allowed in comments, but URLs will be hyperlinked. Comments are not for promoting your articles or other sites.


    Click to Rate This Article
    working