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This computer security diagram example was designed on the base of the Wikimedia Commons file: Firewall.png.
[commons.wikimedia.org/ wiki/ File:Firewall.png]
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. [creativecommons.org/ licenses/ by-sa/ 3.0/ deed.en]
"In computing, a firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted, secure internal network and another outside network, such as the Internet, that is assumed to not be secure or trusted. Firewalls are often categorized as either network firewalls or host-based firewalls. Network firewalls are a software appliance running on general purpose hardware or hardware-based firewall computer appliances that filter traffic between two or more networks. Host-based firewalls provide a layer of software on one host that controls network traffic in and out of that single machine. Firewall appliances may also offer other functionality to the internal network they protect such as acting as a DHCP or VPN server for that network." [Firewall (computing). Wikipedia]
The cybersecurity diagram example "Firewall between LAN and WAN" was created using the ConceprDraw PRO software extended with the Network Security Diagrams solution from the Computer and Neworks area of ConceptDraw Solution Park.
Computer security diagram
Computer security diagram, monitor, firewall, elbow connector, without arrows, elbow connector, display, direct connector, without arrows,
Used Solutions

Wireless Network WAN

Wireless Networks solution from ConceptDraw Solution Park extends ConceptDraw DIAGRAM diagramming and vector drawing software to help network engineers and designers efficiently design, create and illustrate WAN network diagram of any complexity. The ConceptDraw DIAGRAM software helps users to quickly transit from an idea to the implementation of a Wireless Network WAN

Local area network (LAN). Computer and Network Examples

Local area network (LAN) diagram
Local Area Network (LAN) is a network which consists of computers and peripheral devices connected each other and to the local domain server, and covers a little territory or small number of buildings, such as home, school, laboratory, office, etc. LAN serves for few hundreds of users. It includes many cables and wires, and demands to design previously a Network diagram. All local area network devices can use the shared printers and disk storage. ConceptDraw DIAGRAM is a perfect network diagramming software with examples of LAN Diagrams, templates and predesigned vector objects. ConceptDraw DIAGRAM is the ideal choice for network engineers and network designers who need to draw fast and easy Local Area Network Diagrams, for IT specialists, developers and other IT professionals which need to visualize the communication schemes of LAN and visually document the LAN's physical structure and arrangement in houses, offices and other buildings. Ready-to-use vector objects from Computer Network Diagrams solution will help you design LAN diagrams in minutes.
How to Draw a Computer Network
How to Draw a Computer Network

Cisco WAN. Cisco icons, shapes, stencils and symbols

The ConceptDraw vector stencils library Cisco WAN contains equipment symbols for drawing the computer wide area network diagrams.

Wide area network (WAN) topology. Computer and Network Examples

Wide area network (WAN) is a type of telecommunication network, which is used to connect the computers on a wide geographical area. WANs are quite popular and widely used networks, the most known and bright example of WAN is the Internet. They offer exceedingly convenient and quick way of exchanging information and data between employees, suppliers, and clients that are geographically remote each other. WANs are often constructed from several smaller networks (LANs, MANs, etc.) and use effectively different packet switching and circuit switching technologies. ConceptDraw DIAGRAM is a powerful network diagramming software. Including Computer and Networks Area with extensive variety of solutions, ConceptDraw DIAGRAM offers a lot of ready-to-use predesigned vector stencils, wide set of examples and samples, helping the business and government entities effectively design professional-looking Wide area networks (WANs) and Wide area network topology diagrams of any complexity. Wide export capabilities of ConceptDraw DIAGRAM greatly extend your opportunities.

Cisco Network Design. Cisco icons, shapes, stencils, symbols and design elements

Cisco is the largest company, which specializes in the field of high technologies, develops and sells network equipment mainly for the large organizations and telecommunication companies. Cisco produces wide variety of devices and equipment, such as routers, switches, gateways, servers, network security devices (firewalls, VPN, IDs, etc.), ATM switches, cable modems and DSL equipment, access points Wi-Fi, products for IP telephony, etc. The first commercially successful multi-protocol router, which enabled for previously incompatible computers to communicate between themselves, is also developed by Cisco company. Cisco is a generally accepted standard, which uses globally recognized Cisco icons for all produced Cisco equipment. ConceptDraw DIAGRAM software extended with Cisco Network Diagrams solution from Computer and Network area contains a lot of predesigned Cisco network design elements for professional drawing Cisco network diagrams, visualization computer network topologies, equipment connections and arrangement.

Network Diagram Examples

Network diagram is a chart which represents nodes and connections between them in computer network or any telecommunication network, it is a visual depiction of network architecture, physical or logical network topology. There are used common icons for the Network diagrams design, such as icons of various network appliances, computer devices, routers, clouds, peripheral devices, digital devices, etc. Network diagrams can represent networks of different scales (LAN level, WAN level) and detailization. ConceptDraw DIAGRAM diagramming software enhanced with Computer Network Diagrams solution from Computer and Networks area includes huge collection of computer and network templates, design objects and stencils, and numerous quantity of Network diagram examples and samples, among them: Basic Computer Network Diagrams, Communication Network Diagram, Wireless Router Network Diagram, LAN Topology Diagram, Computer Network System Design Diagram, Mobile Satellite Communication Network, Web-based Network Diagram, Hybrid Network Diagram, and many others.

Personal area (PAN) networks. Computer and Network Examples

Personal area (PAN) networks
Personal area network (PAN) is a network organized on a limited area and used for data transmission between various personal devices, such as computers, tablets, laptops, telephones, different digital and mobile devices, etc. and also for connecting to higher level network and Internet. PAN is used to manage the interconnections of IT devices which surround a single user and generally contains such appliances, as cordless mice, keyboard, phone, and Bluetooth handsets. PANs can be wired with computer buses, or wirelessly connected to the Internet using such network technologies as Bluetooth, Z-Wave, ZigBee, IrDa, UWB, Body Area Network. PANs have a lot of pros and cons, they are expedient, lucrative and handy, but sometimes have bad connection with other networks on the same radio bands, Bluetooth has distance limits and slow data transfer speed, but is comparatively safe. ConceptDraw DIAGRAM diagramming software supplied with numerous solutions of Computer and Networks Area included to ConceptDraw Solution Park perfectly suits for designing the Personal Area Networks.
This example of cloud computing system architecture diagram was redesigned from the Wikimedia Commons file: Windows Azure Network and Computes Architecture.png. [commons.wikimedia.org/ wiki/ File:Windows_ Azure_ Network_ and_ Computes_ Architecture.png]
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 license. [creativecommons.org/ licenses/ by-sa/ 2.0/ ]
"Microsoft Azure (formerly Windows Azure before 25 March 2014) is a cloud computing platform and infrastructure, created by Microsoft, for building, deploying and managing applications and services through a global network of Microsoft-managed datacenters. It provides both PaaS and IaaS services and supports many different programming languages, tools and frameworks, including both Microsoft-specific and third-party software and systems." [Microsoft Azure. Wikipedia]
The diagram example "Microsoft Azure network and computes architecture" was created using ConceptDraw PRO diagramming and vector drawing software extended with the Azure Architecture solution from the Computer and Networks area of ConceptDraw Solution Park.
Cloud computing system architecture diagram
Cloud computing system architecture diagram, worker role, web role, storage, firewall, SQL database, Azure load balancer,
Used Solutions

Network diagrams with ConceptDraw DIAGRAM

Network diagram is effective tool for representing and description the network knots and connections between them in comprehensible graphic view, for studying and analysis them. The network administrators and engineers actively use Physical Network Diagrams and Logical Network Diagrams, which are both indispensable when developing and documenting new networks, and managing existing ones. Network diagrams let clearly represent the network configuration and structure, used protocols, addresses, and also names of network objects. Physical Network Diagrams depict the information about telecommunications data, servers, location of network equipment and number of network users. Logical Network Diagrams describe about logical network structure. It is useful to use the ready sets of network clipart, pictures and symbols for indication the network knots on a diagram, such as developed by professionals and offered in large quantity by Computer Network Diagrams solution from ConceptDraw Solution Park.