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The Data flow diagram (DFD) example "Payment for goods using UPS code scanner" shows data flow in process of payment for goods in the shop using the MaxiCode scanner.
"MaxiCode is a public domain, machine-readable symbol system originally created and used by United Parcel Service. Suitable for tracking and managing the shipment of packages, it resembles a barcode, but uses dots arranged in a hexagonal grid instead of bars. MaxiCode has been standardised under ISO/ IEC 16023.
A MaxiCode symbol (internally called "Bird's Eye", "Target", "dense code", or "UPS code") appears as a 1 inch square, with a bullseye in the middle, surrounded by a pattern of hexagonal dots. It can store about 93 characters of information, and up to 8 MaxiCode symbols can be chained together to convey more data. The centered symmetrical bullseye is useful in automatic symbol location regardless of orientation, and it allows MaxiCode symbols to be scanned even on a package traveling rapidly." [MaxiCode. Wikipedia]
This example of data flow diagram (Gane & Sarson notation) was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park.
DFD
DFD, process, external entity, data store,
The vector stencils library "Rack diagrams" contains 33 rack design elements for drawing the computer network server rack diagrams.
"A 19-inch rack is a standardized frame or enclosure for mounting multiple equipment modules. Each module has a front panel that is 19 inches (482.6 mm) wide, including edges or ears that protrude on each side which allow the module to be fastened to the rack frame with screws. ...
Equipment designed to be placed in a rack is typically described as rack-mount, rack-mount instrument, a rack mounted system, a rack mount chassis, subrack, rack mountable, or occasionally simply shelf. The height of the electronic modules is also standardized as multiples of 1.75 inches (44.45 mm) or one rack unit or U (less commonly RU). The industry standard rack cabinet is 42U tall. ...
19-inch racks in 2-post or 4-post form hold most equipment in modern data centers, ISP facilities and professionally designed corporate server rooms. They allow for dense hardware configurations without occupying excessive floorspace or requiring shelving." [19-inch rack. Wikipedia]
The clip art example "Rack diagrams - Vector stencils library" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Rack Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
19 inch Rack with Rails
19 inch Rack with Rails, 19 inch rack,
Rack
Rack, rack,
Rack rails
Rack rails, rack rails,
Rack rails (half-width)
Rack rails (half-width), rack rails,
Single rack rail
Single rack rail, single rack rail,
Xserve RAID
Xserve RAID, Xserve RAID, Apple Xserve Raid 3U,
XServe
XServe, XServe, Apple XServe 1U,
1U tray
1U tray, 1U tray,
1U spacer
1U spacer, 1U spacer,
2U server
2U server, 2U server,
1U Ethernet Switch/Hub
1U Ethernet Switch/Hub, 1U ethernet switch hub,
2U Ethernet Switch/Hub
2U Ethernet Switch/Hub, 2U ethernet switch hub,
1U power strip
1U power strip, 1U power strip,
1U KVM switch
1U KVM switch, 1U KVM switch,
1U patch panel
1U patch panel, patch panel,
Rackmount UPS
Rackmount UPS, UPS, rackmount UPS,
Cisco switch (WS-C3560-24PS-S)
Cisco switch (WS-C3560-24PS-S), Cisco switch, WS-C3560-24PS-S,
Cisco switch (WS-C3560-48TS-S)
Cisco switch (WS-C3560-48TS-S), Cisco switch, WS-C3560-48TS-S,
Cisco switch (WS-C2960-48TT-L)
Cisco switch (WS-C2960-48TT-L), Cisco switch, WS-C2960-48TT-L,
Cisco switch (WS-C2960-48TC-L)
Cisco switch (WS-C2960-48TC-L), Cisco switch, WS-C2960-48TC-L,
Cisco switch (WS-C2960-24TT-L)
Cisco switch (WS-C2960-24TT-L), Cisco switch, WS-C2960-24TT-L,
Cisco switch (WS-C2960-24TC-L)
Cisco switch (WS-C2960-24TC-L), Cisco switch, WS-C2960-24TC-L,
7U rackmount LCD monitor
7U rackmount LCD monitor, 7U rackmount LCD monitor,
8U rackmount LCD monitor
8U rackmount LCD monitor, 8U rackmount LCD monitor, 8U rack LCD display,
Fiber optic patch panel (type A)
Fiber optic patch panel (type A), fiber optic patch panel,
Fiber optic patch panel (type B)
Fiber optic patch panel (type B), fiber optic patch panel,
Fiber optic patch panel (type C)
Fiber optic patch panel (type C), fiber optic patch panel,
3U server
3U server, 3U server,
2U RAID array
2U RAID array, 2U RAID array,
3U RAID array
3U RAID array, 3U RAID array,
Managed UPS
Managed UPS, managed UPS,
1U 19'' LCD monitor keyboard
1U 19'' LCD monitor keyboard, LCD monitor keyboard, KVM,
1U server
1U server, 1U server,
Rack Diagrams visualize the rack mounting of computer hardware and network equipment as the drawing of frontal view of the rack with equipment installed.
They are used for choosing the equipment or racks to buy, and help to organize equipment on the racks virtually, without the real installation.
"A server is a system (software and suitable computer hardware) that responds to requests across a computer network to provide, or help to provide, a network service. Servers can be run on a dedicated computer, which is also often referred to as "the server", but many networked computers are capable of hosting servers. In many cases, a computer can provide several services and have several servers running. ...
Servers often provide essential services across a network, either to private users inside a large organization or to public users via the Internet. Typical computing servers are database server, file server, mail server, print server, web server, gaming server, application server..." [Server (computing). Wikipedia]
This network server rack diagram example was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Rack Diagrams solution from the Computer and Networks area of ConceptDraw Solution Park.
Rack diagram
Rack diagram, power strip, patch panel, managed UPS, RAID array, LCD monitor keyboard, KVM, KVM switch, Fibre patch panel, type A, Ethernet, switch, hub, Cisco switch, WS-C3560-48TS-S, Cisco switch, WS-C2960-48TT-L, Cisco switch, WS-C2960-48TC-L, 3U server, 2U server, 1U tray, 1U spacer, 19 inch, rack, rails,  Ethernet, switch, hub,