UMB‐DNS‐ADV‐K9 Cisco Umbrella DNS Security Advantage

[Ataur Rahaman]

My corporate office purchased this "25x UMB‐DNS‐ADV‐K9 Cisco Umbrella DNS Security Advantage."
The umbrella DNS are. 

208.67.222.222

208.67.220.220

we can use them free of cost in any network. I am already using it in my PC. why we need to buy this "25x UMB‐DNS‐ADV‐K9 Cisco Umbrella DNS Security Advantage." What is the different? 

[pieterh]

with this license you have access to additional features:
if you do not use this features, you can indeed doubt if you need that license

DNS Security Advantage: Key features

• Use the Investigate web console for interactive threat intel access and the on-demand enrichment API to integrate intelligence into other systems
• Discover and block shadow IT (based on domains) with the App Discovery report
• Proxy and decrypt risky domains for deeper inspection of URLs and files
• Enable web filtering using 85+ domain content categories
• Create custom allow and block lists
• Protect mobile and roaming users who are off network