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.

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

[单选题] An ___(70)___ statement can perform. a calculation and store the result in a variable sothat it can be used later.(70)A. executableB． inputC． outputD． assignment

[单选题]Organizations perform. work to achieve a set of objectives. Generally, work can be categorized as either projects or operations, although the two sometimes are(67).A．confusedB．sameC．overlapD．dissever

[单选题] Organizations perform. work to achieve a set of objectives. Generally,work can be categorized as either projects or operations, although the twosometimes are (67) .A．confusedB．sameC．overlapD．dissever

[单选题]Perform. Quality Control is the process of monitoring and recording resuks of executing the Quality Plan activities to assess performance and recommend necessary changes．（ ）are the techniques and tools in performing quality control． ①Activity network

[单选题]Perform. Quality Control is the process of monitoring and recording results of executing the Quality Plan activities to assess performance and recommend necessary changes. ______ are the techniques and tools in performing quality control.. ① Statisti

[单选题]______statement can perform. a calculation and store the result in a variable So that it can be used later．A．AssignmentB．ControlC．I/OD．DeclarationA．B．C．D．

[单选题] （73） statement can perform. a calculation and store the result in a variable so that it can be used later.（73）A． AssignmentB． ControlC． I/OD． Declaration

[单选题]A．n(70) statement can perform. a calculation and store the result in a variable so that it can be used later.A．executableB．inputC．outputD．assignment

[单选题]A．n （70） statement can perform. a calculation and store the result in a variable sothat it can be used later.（70）A． executableB． inputC． outputD． assignment

[单选题]systems perform. basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and(75)on the disk, and controlling peripheral devices such as disk drives and printers.A．OperationB．OperatorC．Ope