2017上半年信息安全工程师考试已经结束了，编程学习网小编为大家整理了信息安全工程师上午真题。
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（71）(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（72）,the attacker inserts a large amount of（73）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（74）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（75）the net work.
A.message
B.information
C.request
D.date
A.methods
B.cases
C.hands
D.sections
A.bad
B.cases
C.fake
D.new
A.or
B.administrator
C.editor
D.attacker
A.or
B.of
C.in
D.to
返回目录：2017年信息安全工程师考试上午真题汇总
想要报考2018年软考的朋友现在就可以开始备考了，可以报名编程学习网软考学院，编程学习网软考学院含有软考各科目赠送考试：辅导教材、历年真题、考前冲剌资料、在线模拟测试题库，还有老师专属答疑指导等，帮助大家顺利通过考试。
>>>>>>点击进入软考报名专题
