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On which protocol is the client-server communication based?

In the quiz there is a question
On which protocol is the client-server communication based?
1)http
2)ftp
3)arp
4)pop

My questions is http & ftp both are client server based right why is the answer only http

Hey @Kapil_Pothakanoori

FTP is used to upload or download files between server and client, whereas there might be more services required between server and client, which are fulfilled by HTTP.

Shaheryaar Kamal | Technical Content Engineer

@Kapil_Pothakanoori The quiz has been updated.