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Firewall between LAN and WAN

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. Read more
Computer security diagram
Computer security diagram, monitor, firewall, elbow connector, without arrows, elbow connector, display, direct connector, without arrows,
"A computer network diagram is a schematic depicting the nodes and connections amongst nodes in a computer network or, more generally, any telecommunications network. ...
Readily identifiable icons are used to depict common network appliances e.g. Router, and the style of lines between them indicate the type of connection. Clouds are used to represent networks external to the one pictured for the purposes of depicting connections between internal and external devices, without indicating the specifics of the outside network. ...
At different scales diagrams may represent various levels of network granularity. At the LAN level, individual nodes may represent individual physical devices, such as hubs or file servers, while at the WAN level, individual nodes may represent entire cities. In addition, when the scope of a diagram crosses the common LAN/MAN/WAN boundaries, representative hypothetical devices may be depicted instead of showing all actually existing nodes." [Computer network diagram. Wikipedia]
The computer network diagram template for the ConceptDraw PRO diagramming and vector drawing software is included in the Computer and Networks solution from the Computer and Networks area of ConceptDraw Solution Park. Read more
Computer network diagram template
Computer network diagram template, wireless router, switch, server, laptop computer, notebook, PC, Internet, 1U server,
The vector stencils library "Cisco WAN" contains 15 symbols of wide area network (WAN) devices and equipment: CSU/DSU (Channel Service Unit/Data Service Unit), WAN, MUX (multiplexer), PBX switch, Hub, NAT (network address translation), distributed and local directors, PBX (private branch exchange), Network clouds, DPT (dynamic packet transport).
Create the computer network topology diagrams using the ConceptDraw PRO diagramming and vector drawing software with the design elements library "Cisco WAN".
"A wide area network (WAN) is a network that covers a broad area (i.e., any telecommunications network that links across metropolitan, regional, or national boundaries) using private or public network transports. Business and government entities utilize WANs to relay data among employees, clients, buyers, and suppliers from various geographical locations. In essence, this mode of telecommunication allows a business to effectively carry out its daily function regardless of location. The Internet can be considered a WAN as well, and is used by businesses, governments, organizations, and individuals for almost any purpose imaginable.
Related terms for other types of networks are personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively." [Wide area network. Wikipedia]
The example "Design elements - Cisco WAN" is included in the Cisco Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park. Read more
Cisco WAN symbols
Cisco WAN symbols, network cloud, local director , hub, distributed director, cloud, WAN, PBX switch , PBX, NAT, MUX, DPT, CSU, DSU ,
The vector stencils library "Cisco WAN" contains 15 symbols of wide area network (WAN) devices and equipment for drawing Cisco WAN diagrams.
"A wide area network (WAN) is a network that covers a broad area (i.e., any telecommunications network that links across metropolitan, regional, or national boundaries) using leased telecommunication lines. Business and government entities utilize WANs to relay data among employees, clients, buyers, and suppliers from various geographical locations. ...
Related terms for other types of networks are personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively.
... it may be best to view WANs as computer networking technologies used to transmit data over long distances, and between different LANs, MANs and other localised computer networking architectures. ...
WANs are often built using leased lines. At each end of the leased line, a router connects the LAN on one side with a second router within the LAN on the other. Leased lines can be very expensive. Instead of using leased lines, WANs can also be built using less costly circuit switching or packet switching methods. Network protocols including TCP/IP deliver transport and addressing functions. Protocols including Packet over SONET/SDH, MPLS, ATM and Frame relay are often used by service providers to deliver the links that are used in WANs." [Wide area network. Wikipedia]
The symbols example "Cisco WAN - Vector stencils library" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Cisco Network Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
www.conceptdraw.com/solution-park/computer-networks-cisco Read more
CSU/DSU
CSU/DSU , CSU, DSU ,
WAN
WAN, WAN,
MUX
MUX, MUX,
PBX switch
PBX switch , PBX switch ,
Hub
Hub, hub,
Hub, blue
Hub, blue, hub,
NAT
NAT, NAT,
Network cloud, dark
Network cloud, dark, network cloud,
Network cloud, gold
Network cloud, gold, network cloud,
Network cloud, white
Network cloud, white, cloud,
Network cloud, standard color
Network cloud, standard color, cloud,
Distributed director
Distributed director, distributed director,
Local director
Local director, local director ,
PBX
PBX, PBX,
DPT
DPT, DPT,