Complex sentence: There are only about 400 CCIE Security certification holders worldwide; this track concentrates on network security and covers subjects such as Cisco PIX firewall, IOS security Wireless LAN security and many others.
Split into simpler sentences: There are only about 400 CCIE Security certification holders worldwide. This track concentrates on network security and covers subjects such as Cisco PIX firewall, IOS security, Wireless LAN, security and many others.