Firewall throughput question

For those with some networking experience….I was talking with my sysadmin who recently deployed a Palo Alto about the the DDoS attacks like on KrebsOnSecurity last week (6.5 Tbps) and Cloudflare earlier this year (5.8 Tbps). Ours has a throughput in the Gbps range, not Tbps. How does the industry handle scaling something like this/is there even one product that can handle that kind of attack?