Network Security
The Internet is a giant computer network which connects computers all over the world. Now the Internet is widely used in all spheres of the life and activity, it is first of all a way to exchange information, without which today is difficult to imagine the life. The Internet is integral part of human society and business. But the serious question for network engineers, designers, lawmakers and enforcers is the need for protect the Internet networks from the Internet crimes, hacking and attacks.
There are many kinds of dangers and ways of attacks, but there are also quite a number of hardware, software and physical methods of protection against them. Such devices as routers, IDS and Firewalls are examples of hardware devices used for network security. Anti-virus software and VPNs are some of the software network security tools.
One of the most effective and easily implemented ways to protect the networks is the use of Firewalls. The Firewall is a first line of defense against the external threats to networks, it can be either software based or hardware based. The main task of firewall is to allow the authorized access to a computer while blocking unauthorized access. The Network layer firewalls makes decisions based on the source address, destination address and ports in individual IP packets. Modern network layer firewalls maintain internal information about states of the connections passing through them.
Depending of the service kind and security you need for your network, you can choose the type of firewall. The most useful types of firewalls are: Screened host firewall, Screened subnet firewall, Packet filer firewall, Stateful inspection firewall, Hybrid firewall, Proxy server firewall, Application level (gateway) firewall.
ConceptDraw DIAGRAM is a powerful diagramming and vector drawing software that allows quick and easy draw the diagrams of your safe networks.
Example 1. Network Security
Computer and Networks Area provides the Network Security Diagrams solution that contains the libraries with a great number of predesigned vector stencils, a set of professional looking examples that you can change for your needs.
All numerous predesigned Network Security Diagram samples are available from ConceptDraw STORE. Use of ready sample is the most simply and quick way of drawing diagrams, you can start with ready sample and change it according to your taste and needs.
Example 2. Network Security Diagram - Access Control and Encryption
The samples you see on this page were created in ConceptDraw DIAGRAM using the tools of Network Security Diagrams Solution for ConceptDraw DIAGRAM software. They show protection networks with Firewalls and other network security devices. An experienced user spent 5-10 minutes creating each of these samples.
Use the Network Security Diagrams Solution for ConceptDraw DIAGRAM to create your own Network Security Diagrams quick, easy and effective.
All source documents are vector graphic documents. They are available for reviewing, modifying, or converting to a variety of formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the ConceptDraw STORE. The Network Security Diagrams Solution is available for all ConceptDraw DIAGRAM users.
TEN RELATED HOW TO's:
Use the ConceptDraw DIAGRAM diagramming and vector drawing software enhanced with powerful tools of Network Security Diagrams Solution from the Computer and Networks Area of ConceptDraw Solution Park to effectively visualize the importance of network security and wireless network security, and ways to ensure them, to easily design Network Security Diagrams and Maps, Network Security Model, Secure Wireless Network and Network Security Architecture diagrams.
Picture: Secure Wireless Network
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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
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ConceptDraw DIAGRAM diagramming and vector drawing software extended with Security and Access Plans Solution from the Building Plans Area of ConceptDraw Solution Park is a powerful software for fast and easy drawing professional looking Physical Security Plan.
Picture: Physical Security Plan
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The reliability is a cornerstone for any corporate computer network. If you want to provide a high fault tolerance, a mesh network topology would be the solution. The main advantage of this network is that every node can work as a commutator, although it’s not easy to set up this kind of network.
A mesh network topology may be full, or partial. Full mesh network means that each node of the network (computer, workstation or other equipment) is connected directly to each of the other nodes. A partial mesh topology means that a part of nodes are connected with a whole network, and the other part of nodes are only connected to those equipment, they exchange the majority of data. This illustration shows schematic diagram of a partial mesh network containing six nodes. Each node is represented as a circles and connections are drawn as straight lines. The connections may be both wired and wireless. This scheme can be used to make the specific logical or physical network diagrams by means the ConceptDraw Computer and Networks solution.
Picture: Mesh Network Topology Diagram
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There are many ways to define the flow of information within a system. Structured-systems analysis method often uses data flow diagrams to show data flow, data storages and data processing visualization. These diagrams are easy to develop and quite useful.
Here is a dataflow diagram presenting an example of the manufacturing process flow. The oval process shapes represent a process that controls data within the current system. The process may produce data or make some action based on data. Data flows are represented by lines. They show the movement of information through the system. The direction of the data flow is depicted by the arrow. The external entities are shown by rectangles. They represent the external entities interacting with the system. The data store objects (unclosed rectangles) are used to show data bases participating in a process flow.
Picture: Data Flow Diagram
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Asynchronous Transfer Mode (ATM) is a high-speed networking standard intended for supporting the voice and data communications.
ConceptDraw DIAGRAM is a powerful network diagramming and vector drawing software that provides the Computer and Networks solution with wide set of ready-to-use predesigned vector stencils and examples to help you design the ATM Networks quick and easy.
Picture: ATM Network. Computer and Network Examples
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ConceptDraw DIAGRAM creates drawings, diagrams and charts with great visual appeal in Mac OS X.
Picture: Best Vector Drawing Application for Mac OS X
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Of course it is possible to keep network records in text documents, but it is very difficult to use them later. A more sound way to keep such documentation is to create a network diagram that might represent either logical network structure or physical. These diagrams are easy to understand and you will thank yourself later.
There is a physical network diagram. It is a tool to represent, maintain and analysis of network equipment and interconnections. Network diagram depicts the actual network information in the attractive clear graphic form. One can learn here the LAN cable length, telecommunication type and carrying capacity. The diagram depicts servers, IP address and domain name as well. Also it shows location of hubs, switches, modems, routers, and other network equipment. The sets of special symbols and images delivered with ConceptDraw Network Diagrams solution are used to show network components. Symbols have a standard view. Therefore, various specialists can read the network diagram without any discrepancies.
Picture: Network diagrams with ConceptDraw DIAGRAM
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Cisco switches and hubs deliver the best performance, and often used as network solutions for small businesses, enterprises, data centers. Cisco switches are the core interconnect devices of each computer network. The numerous Cisco switches specifically designed for various applications. Network switches are separated for two types: fixed configuration and modular switches. The fixed configuration switches deprecate swapping or adding another module, and vice versa for modular switch.
Picture: Cisco Switches and Hubs. Cisco icons, shapes, stencils and symbols
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