RHEL 7 and Apache Web Server

I need to install Aache web services on a machine running RHEL 7 Desktop. I've registered the OS but when I run yum I get:

[root@localhost packages]# yum install httpd
Loaded plugins: langpacks, product-id, subscription-manager
rhel-7-desktop-rpms | 3.7 kB 00:00:00
No package httpd available.
Error: Nothing to do

Stuck. :(