There are many caller ID service providers, but most of them are small businesses. In the past, CDN also focused on acceleration. At present, many enterprises are doing anti-CDN, which not only mentions the acceleration function, but also can prevent network attacks such as DDOS, CC, SYN and UDP. The technical principle is: connect multiple or dozens of backbone nodes to your existing server, and hide your source server at the same time, so that the attacker can't find the IP of your source server, and he can attack the nodes under your source server. For each node, each node has its own defense function. Even if the attack causes downtime, there are other nodes to continue working instead of the downtime node.
If you want to guard against CDN service providers, I suggest looking for a company specializing in high-security services to prevent some CDN service providers without high-security services from shoddy! ! ! I feel that Aegis Network Technology is a good CDN service provider!