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The Company is concerned about Layer 2 security threats. Which statement is true about these threats? ()
A . MAC spoofing attacks allow an attacking device to receive frames intended for a different network host.
B . Port scanners are the most effective defense against dynamic ARP inspection.
C . MAC spoofing, in conjunction with ARP snooping, is the most effective counter-measure against reconnaissance attacks that use dynamic ARP inspection (DAI) to determine vulnerable attack points.
D . Dynamic ARP inspection in conjunction with ARP spoofing can be used to counter DHCP snooping attacks.
E . DHCP snooping sends unauthorized replies to DHCP queries.
F . ARP spoofing can be used to redirect traffic to counter dynamic ARP inspection.
G . None of the other alternatives apply.
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Companycom informs the system administrator that there is concern about the Electronic Service Agent and security. What can be said about Electronic Service Agent that will address concerns about security?()
A . All Service Agent transactions are inbound requests secured by encryption (cryptographic processor card) Kerberos, and Hypertext Transfer Protocol Secure (HTTPS).
B . The AT&T Global Network Services (AGNS ) phone connection generates system IDs and passwords for the client every six months. Service Agent has no inbound capability.
C . All Service Agent transactions are outbound requests secured by encryption (Hypertext Transfer Protocol Secure (HTTPS) or POST). Service Agent has no inbound capability.
D . The transmissions from Service Agent can be either by Internet or the AT&T Global Network Services (AGNS) phone connection. Service Agent transactions are inbound requests generated by a point to point connection.
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Nowadays people are more concerned about the environment ______ they live.
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Environmentalists are concerned about loss of ______ that will result from destruction of the forest in the Amazon.
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The stock price fluctuations have sparked the investor's concern about insider trading and market .
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English writers in the Victorian period were all concerned about the fate of .
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In The Bluest Eye actually Tony Morrison deeply concerned about the feeling of being ugly, she portraits a little hurt black girl because they are concerned less.
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Robert Frost is a regional poet in the sense that his poems are mainly concerned about the _______.
A.life in New York
B.country life in New England
C.sea adventures
D.life on the Mississippi
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Despite the______, Alzheimer's researchers are still______about the prospects for immunization, though most agree that more results are needed from humans for us to truly understand immunization's effects.
A.advances… thrilled
B.obstacles … uncertain
C.setback… optimistic
D.publicity … divided
E.pessimism … unconvinced
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What is Laura' s main concern about the job?
A.He wonders if he' ll have enough time to do the job.
B.He is afraid he won' t know enough to do the job well.
C.He fears that the job may be too boring.
D.He thinks that Prof. Nelson has someone else in mind.
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According to the passage, the initial concern about computers was that they might ________.
A) change our personal lives
B) take control of the world
C) create unforeseen problems
D) affect our businesses
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In a fishbone diagram, the effect you are concerned about is placed:
A . at the right-hand end of the spine.
B . at the end of the diagonal line (i.e. "fin").
C . on a branch of a fin.
D . at the left-hand end of the spine.
E . None of the above.
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Which of the following is the major concern of the passage about a student’s needs?
A.Individualism and cooperation..
B.Academic Success and independent thinkin9.
C.Socialization and feeling of competence.
D.Intelligence and respect.
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Compared with modern corporations, the corporations of the past were less concerned about
A.the world outside their business.
B.women's liberation movements.
C.the qualifications of the management.
D.the needs of community and environment.
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He seemed quite____ about the risks she was taking.(concern)
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What is the professor's concern about the student?
A.Her senior project.
B.Her safety.
C.Her health.
D.Her graduation.
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What is the man's main concern about the job?
A.He wonders if he'll have enough time to do the job.
B.He is afraid he won't know enough to do the job well.
C.He fears that the job may be too boring.
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This essay talks about DNA fingerprinting concerning the following aspects EXCEPT___________
A. legal application of the method
B. the way to obtain a DNA sample
C. work yet to be done about DNA fingerprinting
D. possible danger in drawing a DNA sample from the human body
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It can be inferred that the authors chief concern about the current U. S. health care system is ______.
A.the inadequate training of physicians
B.the declining number of doctors
C.the ever-rising health care costs
D.the shrinking primary care resources.
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There is growing public concern about the cost, quality and ________ of health care.
A accessibility
B predictability
C susceptibility
D possibility
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听力原文:Certainly I can give you some example. Factory farming is very bad for the environment, but it makes factory farming companies very high profits; companies aren’t concerned about the destruction of the rain forest and they are often not concerned about the conditions their workers work in.
For questions 13-17, choose the person who is speaking.
Write one letter(A-H)next to the number of the recording.
Do not use any letter more than once.
After you have listened once, replay the recording.
A. manager of a fast food company
B. employee representative of a dairy company
C. personnel manager
D. farmer
E. lawyer
F. bank manager
G. journalist
H. manager of a farm
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What is the principal idea of the article concerned about?
A.Videogame addiction in children.
B.Positive effects of addictions.
C.Families concern about their children’s addiction to videogames.
D.Treatment for videogame addiction.
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The researchers are concerned about increasing()of the illness in the village.
A.A.rate
B.B.speed
C.C.frequency
D.D.happening
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Which of the following is the writer mainly concerned about()
A.The kind of children who do not like school
B.The fate of a thirteen-year-old Tokyo boy
C.The problem of school phobia
D.The shortage of nurses in schools