單項選擇題

You are running a packet sniffer on a network and see a packet containing a long string of "0x90 0x90 0x90 0x90...." in the middle of it traveling to an x86-based machine as a target. This could be indicative of what activity being attempted? 當(dāng)你使用數(shù)據(jù)包嗅探工具查看到一個把X86機(jī)器作為目標(biāo)的的傳輸數(shù)據(jù)中包括"0x90 0x90 0x90 0x90...."這樣的一個長字符串時，意味著進(jìn)行以下哪項活動？（）

A.A buffer overflow attack.一次緩沖區(qū)溢出攻擊
B.Over-subscription of the traffic on a backbone.骨干網(wǎng)超載
C.A source quench packet.一個源抑制的報
D.A FIN scan.一次FIN掃描

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單項選擇題

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

單項選擇題

When referring to the data structures of a packet, what is the proper term to refer to a single unit of TCP data at the transport layer?當(dāng)提及一個數(shù)據(jù)包結(jié)構(gòu)時，以下哪項可以表示一個TCP包在傳輸層的單個數(shù)據(jù)單元？（）

A.TCP segment.TCP段
B.TCP packet.TCP包
C.TCP frame.TCP幀
D.TCP datagram.TCP報文

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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？（）

When referring to the data structures of a packet, what is the proper term to refer to a single unit of TCP data at the transport layer?當(dāng)提及一個數(shù)據(jù)包結(jié)構(gòu)時，以下哪項可以表示一個TCP包在傳輸層的單個數(shù)據(jù)單元？（）

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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？（）

When referring to the data structures of a packet, what is the proper term to refer to a single unit of TCP data at the transport layer?當(dāng)提及一個數(shù)據(jù)包結(jié)構(gòu)時，以下哪項可以表示一個TCP包在傳輸層的單個數(shù)據(jù)單元？（）