E-mail is qualitatively different from the “snail mail” and fax machines that preceded it in the workplace. First, e-mail is usually connected to the same computer networks that house much of a company’s sensitive information. As a result, an employee can attach anything—from the corporate payroll (to a confidential deal memorandum to your wholesale price [...]
Like E-mail, Web access has many legitimate business uses. But staff access to the Web or other downloads, such as file transfer protocol (FTP), opens up the door to data, software, and documents that can harm the company.
The business risks associated with improper Web use and downloads include serious human resources issues as well. Web [...]
The conflicts and the risks between the employee and the company, or the employee, company, and law enforcement officials. There is one more major area of exposure about which every executive must be concerned: disputes and claims among employees, most notably those of sexual harassment. The types of activities and statements considered harassment are becoming [...]
Ecommerce brings the powerful business online. Online marketing is best solution for your ecommerce. Ecommerce owners find himself is hard to occupy one market niche even they are familiar. Marketing online or straightly business online is not about what the sellers are selling. It is all about what powerful technology strategy the sellers are going [...]
We like to gain visitors time by time when we build website, happy and joy come with the traffic spike, as well as the sadness when the site down. To avoid site crash and give your visitors a fast experience, it’s time to introduce a dedicated hosting. A dedicated server is means a server box [...]
A digital signature is an information block attached to a message that could have been created only by a particular individual. One can use public-key technology to produce such a digital signature by creating a message digest of the message and encrypting the message digest with one’s private key. Anyone can validate a signature using [...]
Internet commerce systems need to be available at the times that customers want to use them. Because Internet commerce systems can attract a worldwide customer base, there is no easy notion of business hours. As a limit, the system may need to be available for use 24 hours a day, 7 days a week.
There are [...]
The typical Internet client computer is an Intel PC, Macintosh, or desktop workstation, with a TCP/IP protocol stack and a variety of Internet client applications. (If the PC is running server applications, we will consider it to be a server.) There are two key client-security issues to consider: how does the attacker get at the [...]
Even though BITS supports secure connections over HTTPS, you will most likely want to provide additional security. You can do this by specifically setting the credentials that BITS uses to access the files on the server. BITS supports Basic, Challenge/Response, and Passport authentication schemes.
To execute the sample application, you need to create a virtual directory [...]
A Complete, Prioritized List of Functionality to Be Provided
One of the biggest mistakes you can make during your project scope is to concentrate solely on data needs and neglect functionality. You must focus on functionality as a framework in which you can determine real data needs, not just the ones that are good to have.
Furthermore, [...]
Most companies and organizations today have a Web presence on the Internet. An Internet presence offers numerous business advantages, such as the ability to advertise to a large audience, to interact with customers and partners, and to provide updated information to interested parties.
Assuming your certificate makes it through the entire period of time it is valid without the need for revocation, you will need to renew it. The good news is that, just like at the DMV, you do not have to prove your identity again to get a new certificate. As long as the certificate is [...]
Somebody Leaves the Company leave the Unsolved Problem
You’ve done a fantastic job of selling the business value of your data warehousing project to executive management, and everything is rolling along nicely. Suddenly, two days after a stunning announcement of disappointing quarterly sales and earnings, the executive sponsor from the business side of the organization resigns. [...]
Movements of nodes in a mobile ad hoc network cause the nodes to move in and out of range from one another. As a result, there is a continuous making and breaking of links in the network, causing the network connectivity (topology) to vary dynamically with time. Since the network relies on multihop transmissions for [...]
Proactive protocols perform routing operations between all source destination pairs periodically, irrespective of the need of such routes. These protocols stem from conventional link state or distance-vector routing algorithms, and they attempt to maintain shortest-path routes by using periodically updated views of the network topology. These are typically maintained in routing tables in each node [...]
Security with file servers usually consists of user identification procedures provided by password access to individual servers and individual file protection by user authorization for each file. These provisions can prevent accidental access but become inadequate to protect against willful unauthorized access or harm.
Advantages of File Servers
File servers provide a number of advantages over individual [...]
Remote Procedure Calls
All useful programs use subroutines to accomplish their function. The invocation of a subroutine is called a function call. It is obvious in languages such as C when subroutines are used. It is not so obvious that all languages, even the most advanced 4GL, use function calls extensively.
RPC provides the capability for any [...]
UNIX file servers are platforms dedicated to providing disk access for the network. UNIX networks provide access through a number of systems, variously called network file system (NFS) or remote file system (RFS).
NFS, the more comprehensive, providing the means not only to support file servers but to make all files on all UNIX platforms in [...]
File Servers Hardware
A file server system typically has the following components:
One or more computers with relatively large disk capacity, usually called servers.
Smaller computers, usually called work stations, at users’ desks.
Communications equipment.
The servers may use any type of operating system—for example, MS-DOS, Windows, Windows/NT, UNIX, or OS/2. If a server uses MS-DOS,the network software creates another [...]
Reactive protocols are designed to minimize routing overhead. Instead of tracking the changes in the network topology to continuously maintain shortest path routes to all destinations, these protocols determine routes only when necessary. Typically, these protocols perform a route discovery operation between the source and the desired destination when the source needs to send a [...]
