Frame Relay and Leased Lines
In networking there are many options in having data transferred from one location to another. Two of which include frame relay and leased lines. Frame relay is a communication method that transfers data by dividing information into packets and sending them over a virtual network. Frame relay is a difficult process to understand and to accomplish. Leased lines, however, is the permanent connection between two stations. Leased lines are simpler to understand and do not take a lot of effort to achieve.
According to Computer Networks, frame relay came into existence to overcome the complex protocols caused by slow telephone lines, and expensive computers. Today, telephone lines are fast and inexpensive, which make a good market for frame relay (60). Frame relay is a service in which information can be transmitted in a fast and inexpensive way in either a Local Area Network (LAN) or Wide Area Network (WAN). However, the Frame Relay FAQ Website, refers to frame relay as "cost effective" because it is not necessarily cheap. The most is made out of the purchaser's money.
Frame relay is often referred to as a "cloud" because information travels over many different paths; it is not a physical connection between two stations. It is uncertain how exactly the information will get from place to place at any given time. According to the LAN Times Encyclopedia of Networking, the Permanent Virtual Circuit (PVC) is a path in which the frame relay network connects two end points. These PVC's are always active and are guaranteed to provide a certain level of service (384). Today, frame relay is a true "fast packet" switching network by using switched virtual circuits. Switched virtual circuits can pro...
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...ay. Each data communication need depends on the situation at hand and the communication circuit used would vary accordingly to that situation.
Bibliography:
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"Frame Relay". PC Webopaedia Definition and Links. http://webopedia.internet.com/Networks/Frame_Relay.html.
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Sheldon, Tom. LAN Times Encyclopedia of Networking. Berkeley, California: McGraw-Hill, 1994.
Enclosed is a rough high-level conceptual view of the communication channels. This is very preliminary as we don't what suitable devices we can use for multiplexers, demux, and converters. The idea is to design a full-duplex serial com link between point A and B. The bandwidth is limited in the copper wiring (telephone line) probably would not go any higher than 115 kbps using a modem a constraint distance of 5 miles.
n.a. - n.a. - n.a. - n.a. - n.a. - A+E Networks. 2009. The 'Standard' of the 'Standard'. Web. The Web.
Morse code and the telegraph were ingenious yet simple. Operators used a simple method of dots and dashes for letters and numbers. When the Morse Key was pressed the electric circuit was open and when released the electric circuit was closed. The electrical current traveled through the wire to a printer device that printed a tape of the code message which an operator would translate. This simple solution to communicating long distance has improved and evolved into a newer technology, the packet switch. The single signal wire has evolved into fiber optics. Communicating one at a time has evolved into mass communication.
fiber. Fiber links allow a number of high speed serial links to replace a large number of electrical lines. The use of fiber is thus space saving.
User Communications. Dartmouth College, Department of Computing Services. "Computer and Network Policy." BlitzMail Bulletin. Wed, 15 Nov 2000 13:36:45.
Network cables are another component that is used in communication between network devices. Cables are used to connect one network device to other via several different connections. The most reliable type of connection between two or more devices is to use a wired connection. These connections can be used to share data and access between servers, PCs, printer...
Roberts, Richard M. "Network Secrurity." Networking Fundamentals. 2nd ed. Tinley Park, IL: Goodheart-Willcox, 2005. 599-639. Print.
Berean¡¦s existing network infrastructure is wire line, and uses a T1. Remote users access the network through a dial-up modem pool. Berean¡¦s wire line network model severely limits the accessibility and effectiveness of the Berean network. For example, employees in Berean facilities are unable to access the network easily from meetings, the cafeteria, or anywhere other than their offices. In addition, the effectiveness of remote users is limited by the slow speed of present-day dial-up modem connections.
Starting with probably the most important aspect of our national computer infrastructure
The bus topology connects several computers, or nodes, with a communication channel, often a single cable. Computers on a bus either transmit data to other computers on the network or listen for data from other computers on the network. They are not responsible for moving data from one computer to the next. Consequently, if one computer fails, it does not affect the rest of the network. Because the data, or electronic signal, is sent to the entire network, it travels from one end of the cable to the other. If the signal is allowed to continue uninterrupted, it will keep bouncing back and forth along the cable and prevent other computers from sending signals. Therefore, the signal must be stopped after it has had a chance to reach the proper destination address. To stop the signal from bouncing, a component called a terminator is placed at each end of the cable to absorb free signals. Absorbing the signal clears the cable so that other computers can send data. Both ends of the network must be terminated with a terminator. A barrel connector can be used to extend the cables for better reach. A barrel connector can connect two pieces of cable together to make a longer piece of cable which can be helpful in many office situations. However, connectors weaken the signal and should be used sparingly. One continuous cable is preferable to connecting several smaller ones with connectors. Using too many connectors can prevent the signal from being correctly received. There are ways around that. Another handy piece of equipment is known as a repeater, a repeater can be used to connect two cables together. A repeater actually boosts the signal before it sends the signal on its way. A repeater is...
Communication is the two way of exchange the opinions, news and information by using writing, speech, or gestures including body language and facial reactions. Communication model is refers to the human communication process which means that human will involve in sending and receiving messages or transferring information from the sender to the receiver. As we can see that there are different forms of communication. There are two types of communication models which are linear communication and non-linear communication. (Fill, 2009), explain some ways of communication which is including the source, encoding, message decoding and receiver with some noise situation. But both of the linear can be really appear in the reality of the communication.
Fiber optic technology has opened the door to many more communication opportunities for the world today. It provides higher fidelity long distance telephone conversations, as well as secure communication systems. Today, more than 90% of the United States long-distance traffic is already carried over optical fiber; more than 15 million miles have been installed, virtually all of it using the original design.
Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also lets the user or users share hardware such as Printers and scanners. The speed of access between the computers is lighting fast because the data has a short distance to cover. In most cases a LAN only occupies one or a group of buildings located next to each other. For larger area need there are several other types of networks such as the Internet.
network. This network is usually the Internet or any identical technologies. There are so many
Computers in technological development demand more efficient networking. In a very short period it has changed the way we have looked at things since centuries. It is one industry that is going to shape our future for centuries to come Coming from a background of Electronics and Communication Engineering, I have developed an interest to probe into the area of Networking and Computer Networks. Hence I wish to do Masters in Computer Science (CS) as my major.