單項選擇題

Which of the following type of packets can easily be filtered with a stateful packet filter by enforcing the context or state of the request?以下那個協(xié)議很容易的根據(jù)請求狀態(tài)或者環(huán)境被狀態(tài)包過濾設(shè)備進(jìn)行過濾？（）

A.TCP
B.UDP
C.IP
D.ICMP

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