Entering the Mainstream: The Quality and Extent of Online Education in the United States, 2003 and 2004 represents the second annual study of the state of online education in U.S. Higher Education. Supported by the Alfred P. Sloan Foundation, this years study, like last years, is aimed at answering some of the fundamental questions about the nature and extent of online education: Will online enrollments continue their rapid growth? Are students as satisfied with online courses as they are with face-to-face instruction? What role do schools see online learning playing in their long-term strategy? What about the quality of online offerings - do schools continue to believe that it measures up?The survey analysis is based on a comprehensive nationwide sample of primary campuses for all active United States postsecondary degree granting institutions that are open to the public.
Using an original and unprecedented multi-level analysis of access and use in low-income neighbourhoods, 'Digital Cities' tells the story of information technology use and inequality in American cities and metropolitan areas.
Using an original and unprecedented multi-level analysis of access and use in low-income neighbourhoods, 'Digital Cities' tells the story of information technology use and inequality in American cities and metropolitan areas.
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计算机网络
和美国西蒙与舒斯特国际出版公司合作出版
of widely separated networks , two “ half bridges ” are needed ( see Figures 14-6 and 14-7 , below ) . ... ( a ) Architecture tl , t8 User data t2 , t7 LLC - H User data t3 , t4 , 15 , to MAC - H LLC - H User data MAC - T ( b ) ...
The objective of this book is to provide an up-to-date survey of developments in computer security.
Internet and WWW 2: Internet Network Design, Implementation and Management
Companion CD-ROM The companion CD-ROM contains a test bank with over 200 practice questions and an electronic version of the text. This volume is part of the Exam Certification Guide Series from Cisco Press(r).
With link encryption, each vulnerable communications link is equipped on both ends with an encryption device.Thus,all traffic over all communications links is secured.Although this requires a lot of encryption devices in a large network ...