April 05
Prof. Ismael H. F. Santos
- ismael@tecgraf.puc-rio.br
2
Understanding Ports
nPort is represented by a positive (16-bit)
integer value
nSome ports have been reserved to support common/well known services:
nftp
21/tcp
ntelnet 23/tcp
nsmtp 25/tcp
nlogin 513/tcp
nUser level process/services generally use
port number value
>= 1024