Hey metapost,
Your website can only ever use one name server at a time. You may have noticed that when you setup CloudFlare, they gave you two name servers to use. The first one is the primary name server, the second is a fallback CloudFlare name server.
So if you added Comodo’s name servers to your domain, it would only use them as a fallback, assuming you want to use CloudFlare as a primary name server.
You also mentioned using a CDN, which is actually different than a name server.
A name server tells a browser where to find the DNS information for the domain. A content delivery network (CDN) is used to increase performance of your website by offloading static files that can be served faster by the CDN provider and help reduce your websites server load.
CloudFlare built a CDN that uses name servers to work, but most CDN’s do not actually do this. So you could use another CDN if you wanted to, but I would say having another CDN on top of that might not provide much performance boost.
I hope this answered your question!
what are my original name servers?
A DNS lookup shows these as your current nameservers:
imeo-official.com. 86400 IN NS cheryl.ns.cloudflare.com.
imeo-official.com. 86400 IN NS lex.ns.cloudflare.com.
By default, a domain has no nameservers until you add them. However, registrars such as GoDaddy will add their own nameservers and mailservers to domains purchased through them.
