IDT Group

A network is simply a collection of computers or similar devices that can communicate over a transmission medium.

To actually send any data from one computer to another we need to make use of a network protocol. A network protocol is a set of common rules that defines how data should be sent.

Without a common suite like TCP/IP, the internet would not be possible.

For the wisdom of crowds to work, every individual must work independently.

Pitroda said the scale of such goals requires questioning basic assumptions about what education is and how it is accomplished

If used correctly, computers in more hands can help speed schools along the path to 21st-century learning, Walery says.

The district’s policy didn’t allow for students to bring in their own computers and connect to the school’s network,

It’s this transparency that lowers the barriers to entry and participation.

reputation is a significant resource

What’s the downside to open source?

To innovate or wait: that is the question confronting IT managers on an almost weekly basis.

Perhaps the question instead should be how best to move in this direction yet avoid the faddish false starts that the Chronicle writer cautioned against.

In a nutshell, this theory holds that learning is strengthened, deepened, and made more effective when it is social, is engaged, provides formative assessment (as opposed to just summative), is relevant (tying content to students' concerns), and offers learners multiple paths. But perhaps the single most important component of constructivist learning theory is that learning happens best when students are active—not merely taking notes in lecture halls but writing, thinking, experimenting, creating, and devising.

And everyone involved seems quite happy with being unsure about why exactly it’s important.

The OCW resources, including video-taped labs, simulations, assignments and other hands-on material, have been categorized to match up with the requirements of high school Advanced Placement studies.

giving educators and students an unprecedented opportunity for easy self-expression and reflection that anyone can access--and to which anyone can respond.

There is an excitement that comes from writing for a real, authentic audience instead of a circular file seen only by the teacher,

So, what makes a good blog? The quality of its ideas is important, panelists said, and so is the personality of the blog and its writer. It's important for this personality to come through, so that "you really feel like you're having a human interaction,"

CAI (computer-assisted instruction) approach to education which was strictly content-based and driven by behavioral objectives.

Fifteen minutes per day on a machine should suffice for each of these programs, the machines being free for other students for the rest of each day. (It is probably because traditional methods are so inefficient that we have been led to suppose that education requires such a prodigious part of a young person's day).

The upper layers of the OSI model deal with application issues and generally are implemented only in software. The highest layer, the application layer, is closest to the end user. Both users and application layer processes interact with software applications that contain a communications component. The term upper layer is sometimes used to refer to any layer above another layer in the OSI model. The lower layers of the OSI model handle data transport issues. The physical layer and the data link layer are implemented in hardware and software. The lowest layer, the physical layer, is closest to the physical network medium (the network cabling, for example) and is responsible for actually placing information on the medium.

Internetwork addresses identify devices separately or as members of a group. Addressing schemes vary depending on the protocol family and the OSI layer. Three types of internetwork addresses are commonly used: data link layer addresses, Media Access Control (MAC) addresses, and network layer addresses.

A data link layer address uniquely identifies each physical network connection of a network device. Data-link addresses sometimes are referred to as physical or hardware addresses.

In the United States, Maine has led the way with its laptop program, which has made students more enthusiastic in the classroom, but not necessarily resulted in better test scores.

More than 80 percent of instructors say the laptops help them make lessons more personal to students, make it easier for students to study problems from the real world and to dig deeper into certain topics,

Many teachers who were surveyed also said that students using laptops are becoming better at combining information from multiple sources and expressing their thoughts. Students in the program report that they understand the material better.

“It didn’t cost a cent to do this,” he said.