TCP and UDP socket on Same port ?

bkankru · 11-20-2009, 09:47 AM

Dear Friends,

In the interview I have been asked with following question related to network, I searched it over the internet but it seems to be confusing to me.

Question: Can we open TCP and UDP socket on same port number?

Thanks in Advance,
Have a Good Day,
Ankur.

centosboy · 11-20-2009, 10:07 AM

Quote:

Originally Posted by bkankru

Dear Friends,

In the interview I have been asked with following question related to network, I searched it over the internet but it seems to be confusing to me.

Question: Can we open TCP and UDP socket on same port number?

Thanks in Advance,
Have a Good Day,
Ankur.

answer to this is YES.

dns is an example as is

Code:

[root@host ~]# netstat -plantu | grep named | grep 213
tcp        0      0 213.x.x.x:53            0.0.0.0:*                   LISTEN      15209/named
udp        0      0 213.x.x.x:53            0.0.0.0:*                               15209/named