... the sending router can determine an alternate route to keep traffic moving. Routers also provide links between networks that speak different languages; or in computer speak; networks that use different "protocols". Rooters not only connect networks in a single location or set of buildings, they provide interfaces; or ... a write- protected floppy. Do not boot from floppies except reliable DOS disks or your original production disks. Stay away from pirated software. Computer networks link computers by communication lines and software protocols, allowing data to be exchanged rapidly and r...

• Word Count: 3669
• Approx Pages: 15

... the continent. Describing this work, Roberts explained: "Convinced that it was a worthwhile goal, we set to see where the problems would be. Since computer time sharing experiments at MIT and at Dartmouth had demonstrated that it was possible to link different computer users to a single computer, the cross country experiment built on this advance." (Cerf, 1993) Working with Thomas Merrill, Roberts linked the TX ... -2 computer at MIT and the Q-32 computer at SDC with a circuit switched line. The result of this experiment was the realization that the time-shared ... allows most anyone to...

• Word Count: 4375
• Approx Pages: 18
• Has Bibliography

... were high-speed supercomputers. (supercomputers at the time, desktop machines now) Thanks to APRANET scientists and researchers could share one another's computer facilities over long-distances. By the second year of its operation however, APRANET's users had warped the high cost, computer sharing network into a dedicated, high-speed, federally subsidized electronic post office. The main bulk of traffic on ARPANET was not long ... becomes a part of the internet. The user is free to browse or transfer information with others. Most ISP's even allow their users to set up permanent homepage...

• Word Count: 2502
• Approx Pages: 10

... orientation package for new staff members c. Datacore will provide updated security awareness material and/or training at least annually to all managers, support staff, and computer users. 2. Protecting information a. Users will make sure that information kept on their computers is not lost or damaged (including by viruses), and that confidential information stays confidential b. Sensitive information ... passwords a. Unencrypted passwords must not be stored in disk files of any kind, including email and other documents. b. Datacore system administrators will periodically attempt to "c...

• Word Count: 2999
• Approx Pages: 12
• Has Bibliography
• Grade Level: High School

... and send files, and other information back and forth. The Internet, sometimes called "the Net", is a network that allows users at any one computer, if they have permission, to get information from any other computer and sometimes talk directly to users at other computers worldwide. The Internet is enormously valuable, enabling capability for so many people and organizations. It also constitutes a ... shared global resource of information, knowledge, and means of collaboration, and cooperation among countless diverse communities. The Internet is basically the world's largest computer net...

• Word Count: 2559
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School

... money. A last advantage that has to be mentioned when talking about glass fibre is that optical fibres are ideally suited for carrying digital information, which is especially useful in computer networks. The critical element of every communications system is off course the connection process called switching. This means that switches are needed throughout the whole network, because otherwise you ... infrastructure, which allows its customers to connect their networks to each other in a very flexible way at low costs, it also provides a very secure environment. Many of the typical users...

• Word Count: 4544
• Approx Pages: 18
• Grade Level: High School

... means for deploying forces and logistical attacks, similarly the Internet is providing a preferred avenue to launch attacks upon the information infrastructure of corporations and nations. The convergence of computer systems and the ever changing technical knowledge required to keep up with security measures makes it easy for intruders to transport and deploy information warfare weapons. With an overview of ... The simplest form of information warfare is spoofing - sending false signals to networks or incorrect messages to users. The key is to make the enemy assume the information they r...

• Word Count: 4835
• Approx Pages: 19
• Has Bibliography
• Grade Level: Undergraduate

... - carriers. So, the wireless network was born. Since then, was frequency ranges have been added to accommodate wireless network in order to accommodate the growing number of wireless users, the number of different applications and appliances which use the wireless service and also to enhance wireless and cellular services through advent of new technologies and uses. Today, there are ... parking, DVD rentals and tickets to entertainment events. According to Paul Lee, The mobile payments system can make transactions more secure the system can ask for additional authorization by requiring u...

• Word Count: 4161
• Approx Pages: 17
• Has Bibliography
• Grade Level: High School

... wired networks, should the primary leased lines for wired networks become unavailable. WMANs use either radio waves or infrared light to transmit data. Broadband wireless access networks, which provide users with high-speed access to the Internet, are in increasing demand. Although different technologies, such as the multichannel multipoint distribution service (MMDS) and the local multipoint distribution services ... . Customers connect into the ring via ISDN, T1, fractional T1, and even T3 lines. However, even for short distances, these connections are expensive. A new area of computer...

• Word Count: 3360
• Approx Pages: 13
• Has Bibliography
• Grade Level: High School

... software used to implement a security policy governing the network traffic between two or more networks. A network firewall serves as a primary line of defense against external threats to an organization's computer systems, networks, and critical information. Since firewalls are considered to be the primary line of defense in a system, its administration must be carefully regulated. Therefore, factors such as logging, ... firewall should forbid such connections. As a result, a probable attack is limited to the networks and systems controlled within this trust model. Access Control - The p...

• Word Count: 2550
• Approx Pages: 10
• Grade Level: Undergraduate

... A Threat At the time, the Internet was a small, self-contained project within the government. In the late 1960's, several government laboratories were connected together in the first wide-area computer network. In May of 1972, 3Com founder Bob Metcalfe developed Ethernet networking. It was a standard to allow computers to use a common networking access "language" to communicate with equipment ... computers. The Internet Becomes Accessible In the 1980's, acoustic couplers (modems) were developed and manufactured by companies such as US Robotics and the telecommunications network was used...

• Word Count: 5577
• Approx Pages: 22
• Has Bibliography