If after your yum install httpd, you will notice that the apache has a welcome page similar to
Step 1: To remove the welcome banner, go to /etc/httpd/conf.d
# vim /etc/httpd/conf.d/welcome.conf
Step 2 Inside Comment Out Everything…… inside /etc/httpd/conf.d/welcome.conf
Step3 : Restart httpd
# service httpd restart