I am wondering why, when ping flooding a domain, the ping flood freezes after a couple of seconds then continues and this freeze, unfreeze continues until i stop the ping flood.

When i do the same using the ip it does not freeze. NEVER.

i did for example sudo ping -f IP (It does not freeze)
then i did sudo ping -f DomainName (It freezes after a couple of seconds)

Why does ping flooding an IP not freezes and ping flooding the same place using the domain name does freeze.

EDIT - What i mean about freezing is that the behavior of the ping flood should send a ping and create a dot (.) for each ping but also remove each dot (.) after receiving the echo request. Looks something like this:

.......... <-- This means you just send 10 ping requests.

If the requests are answer, for each request answer a dot is removed. The freeze happens when this is sending or receiving. The dots will stay there frozen, like is not receiving or sending any packets.

For the PING FLOOD. I do not mean in the evil way of flooding a place, i mean in the testing way. To test the performance/speed of the request send and answered of the ping requests. If you send a ping flood to google's IP for about 10 seconds you would have send about 1000 packets.but if you do it to google's domain name (google.com) it will create the freeze am talking about.

IMPORTANT - Do not confuse with flooding a site with ping of death attacks.