関連ワード:  what is the function of tcp ip model    what is the purpose of tcp ip model    what is the role of tcp ip model    what is the function of tcp ip protocol    what is the purpose of the tcp ip model in networking    what is the purpose of tcp ip protocol    what is the role of tcp ip protocol in networking    what is the role of tcp ip protocol    what is the purpose of tcp ip protocol suite    what is the function of transport layer in tcp ip model