#nmap -sP 202.29.78.*
Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
Host   (202.29.78.0) seems to be a subnet broadcast address (returned 1 extra pings). 
Note -- the actual IP also responded.
Host www.isinthai.com (202.29.78.1) appears to be up.
Host course.yonok.ac.th (202.29.78.5) appears to be up.
Host yonok.ac.th (202.29.78.12) appears to be up.
Host w2kdhcp.yonok.ac.th (202.29.78.17) appears to be up.
Host  (202.29.78.31) appears to be up.
Host  (202.29.78.32) appears to be up.
Host  (202.29.78.33) appears to be up.
#nmap -sT www.yonok.ac.th (on TCP)
Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
Interesting ports on yonok.ac.th (202.29.78.12):
(The 1590 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp
22/tcp     open        ssh
25/tcp     open        smtp
53/tcp     open        domain
80/tcp     open        http
109/tcp    open        pop-2
110/tcp    open        pop-3
#nmap www.yonok.ac.th -sU (on UDP)
Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
Interesting ports on yn1.yonok.ac.th (202.29.78.12):
(The 1465 ports scanned but not shown below are in state: closed)
Port       State       Service
53/udp     open        domain
111/udp    open        sunrpc
867/udp    open        unknown