Campus Area Networks (CAN).
Computer and Network Examples
The modern education system, one way or another, aims to form students' abilities to work with information. It is no coincidence that the prior areas of education development pay special attention to form skills of information processing, which later becomes the mainstay of professional activity of graduates in the information society, a necessary component of information culture. In such circumstances, students will acquire the necessary knowledge to express themselves creatively, learn to evaluate the accuracy of the information, develop critical thinking, and distinguish information and knowledge.
Local networks are common in the education field. Most schools and other educational institutions have computers connected to a local network. At the same time, modern technologies allow to connect even the computers that are on different continents, and not only in the same room or building. Numerous educational institutions have branches in different countries, with computer connected via local network. Moreover, local area networks can connect computers from different colleges or universities.
Using Internet, any student can get public access to education materials that can be presented in the form of simple textbooks (e-text), as well as in the form of complex interactive systems, computer models of virtual learning environments, etc. The number of users and information sources of Internet is continuously increasing. In addition, there is a constant quality of telecommunications services improvement. Because of this, not only companies and organizations operating in the economic and other fields have a high-quality access to the Internet, but also educational institutions.
Many systems are susceptible to vulnerabilities that can take full control of critical resources (e-mail systems, network equipment management and others). Critical vulnerabilities are often associated with the use of outdated versions of software and operating systems.
Studies have shown that the modern corporate networks are quite vulnerable to attacks from internal and external intruders. The ability to access the critical resources of most examined systems leads to the conclusion about the necessity of the information security measures improvement, particularly in the area of password policies, web application protection, providing regular security updates and protection of privileged accounts. For safety deficiencies early detection, system administrator should regularly conduct security analysis, including the form of penetration testing.
A Campus Area Network (CAN) is a computer network that links the buildings and consists of two or more local area networks (LANs) within the limited geographical area. It can be the college campus, enterprise campus, office buildings, military base, industrial complex. CAN is one of the type of MAN (Metropolitan Area Network) on the area smaller than MAN.
The Campus networks usually use the:
- LAN technologies,
- such as Ethernet,
- Token Ring,
- Fiber Distributed Data Interface (FDDI),
- Fast Ethernet,
- Gigabit Ethernet
- Asynchronous Transfer Mode (ATM).
ConceptDraw DIAGRAM is a powerful diagramming and vector drawing software that allows quick and easy draw the Campus Area Networks.
Example 1. Computer and Networks area
Computer and Networks Area provides solutions that contain the libraries with a great number of predesigned vector stencils, a set of professional looking examples that you can change for your needs.
Example 2. Computer and Networks examples
Example 3. Computer and Networks symbols for drawing Campus Area Network
All these allow you create the Campus Area Network of any complexity in a few minutes.
Example 3. Campus Area Network (CAN).
This example was created in ConceptDraw DIAGRAM using the Computer and Networks Area of ConceptDraw Solution Park and shows the Campus Area Network.
Campus network can be additional to the set of wireless connections, connect several buildings to the same network, but it's not the same thing. A campus network should be broad enough to cover a large territory, while the point-to-point access simply distributes a separate network within the territory of several buildings. Project Athena at MIT and Stanford University Network at Stanford University are the most well-known networks. Athena was launched in 1983 and it still works. It’s primary purpose was to share experience, code and ideas among students, to found a base of knowledge for the future generations and to develop educational tools. This project influenced the development of instant messaging, online help systems, improved client–server model of distributed computing, developed Kerberos protocol for encrypted authentication and authorization and has many other functional and system management advantages. Some of Athena architecture design features are used beyond MIT, for example in Iowa State University and North Carolina State University.
All networks designed with ConceptDraw DIAGRAM are vector graphic documents and are available for reviewing, modifying, and converting to a variety of formats (image, HTML, PDF, MS PowerPoint, Adobe Flash or MS Visio).
See also Samples:
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This sample shows the Facebook Socio-health system and is used at the projection and creating of the social networking sites.
Picture: UML Use Case Diagram Example. Social Networking Sites Project
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Picture: Network Components
If you have a small budget to design a computer network, you have to be very careful. One of the most cheap technologies to implement is a bus network topology, however it has many disadvantages. For instance, if the network cable is somehow damaged, the entire network won't work.
This diagram illustrates a so-called "Bus" network topology. This type of network arrangement means that each computer or other device is linked to a main link (bus). The end nodes are shown as a circle. The links to the bus are depicted as solid vertical lines. The bus is shown as a bold horizontal line. This diagram can serve as a template for creating logical or physical network diagrams. The set of vector libraries supplied with ConceptDraw Computer and Networks solution contains the symbols of all LAN and WLAN elements required for creating network diagrams of any configuration.
Picture: Bus Network Topology
What is a computer network? This is a set of devices and systems that are connected to each other (logically or physically) and communicate with each other. This could include servers, computers, phones, routers, and so on. The size of this network can reach the size of the Internet, and can consist of only two devices connected by a cable.
This sample shows the connection scheme of the home WLAN equipment to the Internet.
Picture: Diagram of a Basic Computer Network. Computer Network Diagram Example
Planning a computer network can be a challenge for a junior specialist. However, knowing how to draw a computer network diagrams isn’t a rocket science anymore. There are a lot of special software for creating such diagrams with predesigned templates and examples.
The core for Network Fault Tolerance System presented here, is the equipment of Cisco. You can see here the certified Cisco equipment icons. Generally, ConceptDraw DIAGRAM libraries contain more than half of a thousand objects representing the standardized images of Cisco equipment. ConceptDraw solution for network diagramming is a great network diagramming tool for any level skills - from students to network guru.
Picture: How to Draw a Computer Network Diagrams
How to Draw ER Diagrams? With Entity-Relationship Diagram (ERD) solution from the Software Development Area for ConceptDraw Solution Park you are able to draw ER diagram with no problem. It includes 45 predesigned icons advocated by popular Chen's and Crow’s Foot notations that can be used when describing an enterprise database.
Picture: How to Draw ER Diagrams
Local area network connects computers and other network appliances within an area, such as office building or a campus. It can be difficult to provide such network without a predesigned plan. For these purposes you can use network diagram software, which helps you to create LAN network diagrams and office network diagrams quickly and effortless. This will speed up your work and you can save the diagram for the future network improvements.
The following diagram illustrates a network topology of the small office. LAN configuration has a star topology. The local network joins 8 computers among which are several desktop PCs, laptop, two iMacs and iBook. The end-point devices are divided into three groups. Each group is connected to its hub. There is a network printer and a modem, which are interconnected with other devices through a network server. Each computer on the LAN can access the server through a corresponding hub.
Picture: Network Diagram Software. LAN Network Diagrams. Physical Office Network Diagrams
There are many ways to describe a database structure. One of the most usual is to draw an entity relationship diagram (ERD) using a Crow’s Foot notation to represent database elements. If you don’t want to draw it on paper, you should use an appropriate software.
An entity-relationship (ER) diagram is used to show the structure of a business database. ERD represents data as objects (entities) that are connected with standard relationships symbols which Illustrate an association between entities. ERD, there is a wide range of ERD notations used by data bases architects for reflecting the relationships between the data entities. According to the crow’s foot notation relationships are drawn as single labeled lines designating a certain kinds of relationship. Crow foot notation is a most frequently used ERD standard, because of improved readability of diagrams, with a more accurate use of space on the page.
Picture: Entity Relationship Diagram - ERD - Software for Design Crows Foot ER Diagrams