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1 Researchers uncovered a serious flaw in the underlying technology for nearly all Internet traffic, a discovery that led to an urgent and secretive international effort to prevent global disruptions of Web surfing, e-mails and instant messages.
2 The British government announced the vulnerability in core Internet technology on Tuesday. Left unaddressed, experts said, it could allow hackers to knock computers offline and broadly disrupt vital traffic-directing devices, called routers, that coordinate the flow of data among distant groups of computers.
3 "Exploitation of this vulnerability could have affected the glue that holds the Internet together," said Roger Cumming, director for England's National Infrastructure Security Coordination Centre.
4 The Homeland Security Department issued its own cyberalert hours later that attacks "could affect a large segment of the Internet community." It said normal Internet operations probably would resume after such attacks stopped. Experts said there were no reports of attacks using this technique.
5 The risk was similar to Internet users "running naked through the jungle, which didn't matter until somebody released some tigers," said Paul Vixie of the Internet Systems Consortium Inc.
6 "It's a significant risk," Vixie said. "The larger Internet providers are jumping on this big time. It's really important this just gets fixed before the bad guys start exploiting it for fun and recognition."
7 The flaw affecting the Internet's "transmission control protocol," or TCP, was discovered late last year by a computer researcher in Milwaukee. Paul Watson said he identified a method to reliably trick personal computers and routers into shutting down electronic conversations by resetting the machines remotely.
8 Routers continually exchange important updates about the most efficient traffic routes between large networks. Continued successful attacks against routers can cause them to go into a standby mode, known as "dampening," that can persist for hours.
9 Experts previously said such attacks could take between four years and 142 years to succeed because they require guessing a rotating number from roughly 4 billion possible combinations. Watson said he can guess the proper number with as few as four attempts, which can be accomplished within seconds.
10 Cisco Systems Inc., which acknowledged its popular routers were among those vulnerable, distributed software repairs and tips to otherwise protect large corporate customers. There were few steps for home users to take; Microsoft Corp. said it did not believe Windows users were too vulnerable and made no immediate plans to update its software.
11 Using Watson's technique to attack a computer running Windows "would not be something that would be easy to do," said Steve Lipner, Microsoft's director for security engineering strategy.
12 Already in recent weeks, some U. S. government agencies and companies operating the most important digital pipelines have fortified their own vulnerable systems because of early warnings communicated by some security organizations. The White House has expressed concerns especially about risks to crucial Internet routers because attacks against them could profoundly disrupt online traffic.
13 "Any flaw to a fundamental protocol would raise significant concern and require significant attention by the folks who run the major infrastructures of the Internet," said Amit Yoran, the government's cyber security chief. The flaw has dominated discussions since last week among experts in security circles.
14 The public announcement coincides with a presentation Watson expects to make Thursday at an Internet security conference in V
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1 About the time that schools and others quite reasonably became interested in seeing to it that all children, whatever their background, were fairly treated, intelligence testing became unpopular.
2 Some thought it was unfair to minority children. Through the past few decades such testing has gone out of fashion and many communities have indeed forbidden it. However, paradoxically, just recently a group of black parents filed a lawsuit in California claiming that the state's ban on IQ testing discriminates against their children by denying them the opportunity to take the test. (They believed, correctly, that IQ tests are a valid method of evaluating children for special education classes.) The judge, therefore, reversed, at least partially, his original decision.
3 And so the argument goes on and on. Does it benefit or harm children from minority groups to have their intelligence tested？ We have always been on the side of permitting, even facilitating, such testing. If a child of any color or group is doing poorly in school it seems to us very important to know whether it is because he or she is of low intelligence, or whether some other factor is the cause.
4 What school and family can do to improve poor performance is influenced by its cause. It is not discriminative to evaluate either a child's physical condition or his intellectual level. Unfortunately, intellectual level seems to be a sensitive subject, and what the law allows us to do varies from time to time. The same fluctuation back and forth occurs in areas other than intelligence. Thirty years or so ago, for instance, white families were encouraged to adopt black children. It was considered discriminative not to do so. And then the style. changed and this cross-racial adopting became generally unpopular, and social agencies felt that black children should go to black families only. It is hard to say what are the best procedures. But surely good will on the part of all of us is needed.
5 As to intelligence, in our opinion, the more we know about any child's intellectual level, the better for the child in question.
Intelligence testing became unpopular because ______.
The Russia's request for two computers was refused because the United States wanted to prevent their use in
1 In proposed changes to Title IX, the federal law prohibiting sex discrimination in education, the Bush administration wants to encourage creation of single-sex public schools and classes.
2 Our studies of sexism in America's education system have praised private single-sex schools because they offer the promise that education can transform. the future of girls. Girls who attend these schools speak more freely in class, are more likely to major in math and science, and perhaps most encouraging, are more likely to attend college and graduate school.
3 So, given our past support for single-sex schools, you might expect us to be real cheerleaders for the new Bush administration plan.
4 But we are not cheering.
5 There is a right way and a wrong way to explore educational innovation, and the Bush administration has chosen the latter. Congress and the public should stop it before the real problems begin.
6 The No Child Left Behind Act promises to avoid fads and to build educational programs based on scientific evidence and research. But, for public single-sex education, the Bush administration has decided we can skip the evidence. This proposal ignores sound educational policy, and is particularly troubling considering that the effectiveness of single sex education in public schools—which involve different factors from private schools—has yet to be carefully studied.
7 What we applauded in private single-sex schools was not their gender uniformity, but their educational practices. Many educators, including us, attribute much of the academic successes of these private schools to their smaller class sizes, engaged parents, well-trained teachers, and strong academic emphasis. Other educators believe that single-sex schools work less well for boys than for girls, or that only boys from low-income families benefit. Still others believe such schools may intensify gender stereotypes and homophobia. But so far, the Bush plan does not address these factors.
8 This is not the first time single-sex schooling has emerged as a quick fix. Pete Wilson, the former Republican governor of California, tried the same thing in the late 1990s, and even sweetened the pot by providing some extra funds to school districts willing to experiment with single-sex schools. A half-dozen created their own single-sex academies.
9 Did students benefit from the experiment？ It's hard to say, because—like the Bush proposal—planning and evaluation were absent. California provided no training for teachers and no clear rationale for the changes, and within a few years most of these schools returned to coeducation. There were anecdotal reports that the girls enjoyed being in an environment free of sexual harassment and classroom interruptions, while the boys' schools degenerated into a disciplinary disaster, becoming little more than magnets for troubled youth. The California experiment was a valuable lesson in how not to go about educational change—a lesson this administration has chosen to ignore.
10 What the authors of these proposed changes seem to have forgotten is that Title IX is not an educational option, it is a civil rights protection. While Title IX currently permits select single-sex classes—in physical education or to remedy past discrimination, for example—it doesn't allow schools to segregate students arbitrarily.
11 There are powerful reasons for this. Whenever groups have been segregated, the least-valued group has ended up with fewer resources and fewer opportunities. Historically that has been a costly lesson for girls (and African-Americans and the poor). The proposed changes do not require equal treatment or equal facilities, but only "substantially equal" programs. As the proposal now stands, a school could provide a single
Some development experts feel that ______.
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