單項(xiàng)選擇題

ICMP and IGMP belong to which layer of the OSI model? ICMP和IGMP協(xié)議在OSI模型中屬于那層?()

A.Datagram Layer.數(shù)據(jù)報(bào)文層
B.Network Layer.網(wǎng)絡(luò)層
C.DataLink Layer.數(shù)據(jù)鏈路層
D.Transport Layer.傳輸層

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