Figure 9: nmap used to ping servers

nmap -sP 192.168.1.0/24
Starting nmap V. 2.0-Beta12 by Fyodor \
  (fyodor@dhp.com, www.insecure.org/nmap/)

Host biz.abc.com (192.168.1.34) appears to be up.
Host betty.abc.com (192.168.1.36) appears to be up.
Host wow.abc.com (192.168.1.60) appears to be up.