试题1

以下关于安全套接层协议（SSL）的叙述中，错误的是（）
A、是一种应用层安全协议
B、为TCP/IP连接提供数据加密
C、为TCP/IP连接提供服务器认证
D、提供数据安全机制

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试题2

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试题3

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试题4

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试题5

电子商务系统除了面临一般的信息系统所涉及的安全威胁之外，更容易成为黑客分子的攻击目标，其安全性需求普遍高于一般的信息系统，电子商务系统中的信息安全需求不包括（）
A、交易的真实性
B、交易的保密性和完整性
C、交易的可撤销性
D、交易的不可抵赖性

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试题6

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试题7

    There are different ways to perform IP based DoS Attacks. The most common IP based DoS attack is that an attacker sends an extensive amount of connection establishment （1）(e.g. TCP SYN requests) to establish hanging connections with the controller or a DPS. Such a way, the attacker can consume the network resources which should be available for legitimate users. In other （2）, the attacker inserts a large amount of （3）packets to the data plane by spoofing all or part of the header fields with random values. These incoming packets will trigger table-misses and send lots of packet-in flow request messages to the network controller to saturate the controller resources. In some cases, an （4）who gains access to DPS can artificially generate lots of random packet-in flow request messages to saturate the control channel and the controller resources. Moreover, the lack of diversity among DPSs fuels fuels the fast propagation of such attacks.
    Legacy mobile backhaul devices are inherently protected against the propagation of attacks due to complex and vendor specific equipment. Moreover, legacy backhaul devices do not require frequent communication with core control devices in a manner similar to DPSs communicating with the centralized controller. These features minimize both the impact and propagation of DoS attacks. Moreover, the legacy backhaul devices are controlled as a joint effort of multiple network element. For instance, a single Long Term Evilution（LTE）eNodeB  is connected up to 32 MMEs. Therefore, DoS/DDoS attack on a single core element will not terminate the entire operation of a backhaul device（5）the net work.

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试题8

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试题9

包过滤技术防火墙在过滤数据包时，一般不关心（）
A、数据包的源地址
B、数据包的协议类型
C、数据包的目的地址
D、数据包的内容

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试题10

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