CN1185585C - Method of constructing office work application network and its device - Google Patents
Method of constructing office work application network and its device Download PDFInfo
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- CN1185585C CN1185585C CNB021396590A CN02139659A CN1185585C CN 1185585 C CN1185585 C CN 1185585C CN B021396590 A CNB021396590 A CN B021396590A CN 02139659 A CN02139659 A CN 02139659A CN 1185585 C CN1185585 C CN 1185585C
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Abstract
The present invention relates to a method for constructing an office work application network and a device thereof. The method comprises that (1) one or more servers of a working platform of an internal network system are respectively built by using the diskless networking technique, and each work station is connected into an internal network by the servers of the internal network platform by the mode of diskless (or terminals); (2) one or more servers of the working platform of an external network system are respectively built by using the diskless networking technique, and each work station is connected into an external network by the servers of the internal network platform by the mode of diskless (or terminals); (3) a user installs and uses devices related to the present invention, and the internal and the external networks are respectively connected to the same pc work station (or terminal). The present invention simultaneously provides a networking device which can make the internal network and the external network physically disconnected. The device is composed of a network interface switching module, an external memory interface switching module and a switching control module, if necessary, and a five-class line shared connector can be added. The device can be made into a plate card form to be inserted in an expansion slot of a main board of a computer, can be made into a box form to be installed on an installing frame of a CD-ROM driver or a floppy driver, and can be bound with a network card to be made to make the network card as the multifunctional network card with the device.
Description
Technical field
The present invention relates to a kind of computer networking technology, particularly relate to a kind of method and device that makes up the office application network.
Background technology
Along with the widespread use of computer network, the safety problem of network data is more and more outstanding, from various enterprise, commercial field, to key areas such as government, finance, national defence, all is faced with the threat of network data security problem.These threats mainly contain two reasons, and the one, from the malicious attack and the invasion of extranets; The 2nd, or objectively error subjective from the internal staff.Thereby, make up a kind of internal network (INTRANET) security of system that can guarantee and move reliably, can guarantee the computer network that the resource of extranets (as Internet INTERNET etc.) is fully used again, be the requirement during computer network makes up.
At present, known solution has: (1) adopts two cover network systems, disposes two computers simultaneously and joins Intranet and outer net respectively.But so not only increased cost of investment, and used inconvenience and need take bigger working space.(2) isolate with software firewall, this type of is based on the protection of software safety inadequately.(3) can connect the computing machine that Intranet and outer net and assurance are perfectly safe simultaneously, but it to comprise plural main frame, only shared keyboard, mouse, display etc., this scheme, the cost height, production and upgrading computer are all pretty troublesome simultaneously.(4) adopt two hard-disk systems, be equipped with network security separate card and handle, this scheme will increase complexity that the user operates on it and maintenance workload and reach the message exchange aspect more greatly and have leak.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of method and device that makes up the office application network of high security high reliability, realize above-mentioned about making up the requirement of office application network.
The innovation invention solves the technical scheme that its technical matters adopted: (1) utilizes no dish networking technology, setting up one or more internal network workbench server respectively (is called for short: the Intranet Platform Server, provide the service of non-disk startup, emulation terminal, application program), according to the requirement of different user the required application software of user is installed thereon, and carry out authority work is set, each workstation that connects with Intranet is connected into internal network in no dish (or terminal) mode by the Intranet Platform Server.(2) utilize no dish networking technology, setting up one or more external network workbench server respectively (is called for short: the outer net Platform Server, provide the service of non-disk startup, emulation terminal, application program), according to the requirement of different user the required application software of user is installed thereon, and carry out authority work is set, each workstation is connected into extranets (as Internet INTERNET etc.) in the mode of no dish (or terminal) by the outer net Platform Server.(3) user installation is used device involved in the present invention, goes up at same pc workstation (or terminal) and realizes being connected respectively with intranet and extranet.(4) information of the information of extranets (comprising media such as extranets, CD or floppy disk) and in-house network exchanges by the safety management post is set and realizes, be that the information of extranets is when entering in-house network, to pass to the safety officer earlier, through after safety officer's the examination, just information is put into in-house network by the safety officer; When the information of in-house network will output to extranets, pass to the safety officer earlier,, just information be issued extranets and use by the safety officer through after safety officer's the examination.That summarizes says, this method is exactly that in-house network and extranets are disconnected, and on authority the user is carried out control effectively.
The present invention provides a kind of interconnection device that in-house network and extranets are disconnected simultaneously, this interconnection device is made up of network interface handover module, external memory interface handover module, switching controls module, can increase a category-5 cable in case of necessity and share connector.Can make the integrated circuit board form, be inserted in the expansion slot of computer motherboard; Also can make box-packed form, be installed on the erecting frame of CD-ROM drive or floppy drive; Also can make, network interface card be become possess the multi-functional network interface card of said apparatus with network card binding.
The network interface handover module comprises that in one group of change-over switch, this group change-over switch is used to connect the interface of teller work station network interface card, one or two interfaces that are used to connect intranet and extranet.The change-over switch group can be relay switch or electronic switch (as four bidirectional analog switch CD4066, three group of two path analoging switch CD4053 etc.) or tri-state switch.The interface that connects intranet and extranet can be two stand-alone interfaces, also can unite two into one, and when comprehensive wiring system had two category-5 cables, two of the interface configuration of connection intranet and extranet were connected to outer net, Intranet hub (or switch) respectively by two category-5 cables; When comprehensive wiring system only had a category-5 cable, one of the interface configuration of connection intranet and extranet was shared being connected of connector realization and inside and outside net by category-5 cable and is shared a category-5 cable.
The external memory interface handover module comprises that several connect the interface (data-interface or power interface) of external storage, the interface (data-interface of mainboard or the output interface of power supply) of several connection user job station hosts in one group of change-over switch, this group change-over switch.This change-over switch group can be relay switch or electronic switch (as four bidirectional analog switch CD4066, three group of two path analoging switch CD4053 etc.) or tri-state switch.When the teller work station was connected with in-house network, the change-over switch group disconnected the interface of storer and the interface of main frame.When main frame was connected with extranets in no dish mode, the change-over switch group disconnected the interface of storer and the interface of main frame; When main frame was connected with extranets so that the dish mode to be arranged, the change-over switch group made the interface of storer be communicated with the interface of main frame.
The switching controls module comprises triggering combined switch, status indicator lamp.This module can be caused host panel or be caused the outside shaping separately of mainframe box by lead-in wire.Triggering combined switch can be mechanical combined switch, it also can be electronic combination switch, when being connected with network interface handover module, external memory interface handover module, this triggering combined switch also joins with (RESET) signal pin that resets of mainboard, when producing switch-over control signal, also produce (RESET) signal that resets to computer motherboard, make the rapid zero clearings of memory device such as internal memory on the mainboard and high-speed cache, machine startup is connected into the another one network system.
Category-5 cable is shared connector and is used for when comprehensive wiring system only has a category-5 cable user and a shared category-5 cable of being connected of Intranet or outer net.Comprise a comprehensive joint, an Intranet joint, an outer net joint.Comprehensive joint is connected intranet and extranet with interconnection device of the present invention outer connector links to each other, and the Intranet joint links to each other with Intranet hub (or switch), and the outer net joint links to each other with outer net hub (or switch).
Advantage of the present invention is: from physically Intranet and outer net being isolated, guarantee the user can connect Intranet and outer net simultaneously and do not destroy physical isolation degree between these networks, thereby improved the security of network greatly, the user uses the machine just can realization and being connected of Intranet or outer net, and needn't spend substantial contribution again and set up a new Intranet or outer net again.Especially finish the system of comprehensive wiring, and when comprehensive wiring system only has a category-5 cable, the ingenious problem that how to connect Intranet and outer net simultaneously that solved of the present invention, under the situation of not changing existing comprehensive wiring system, just can realize that the user connects Intranet and outer net simultaneously, both simplified installation, cost is reduced greatly.Device involved in the present invention has simple in structure, makes easily, and is with low cost, easy for installation, the characteristics that simple operation is easy-to-use, and compatible fabulous, be easy to expand, if the computer hardware upgrading, this device still can use.The present invention adopts the no disk technology of present maturation to set up the office application network, and the maintenance of system software and application software only needs to carry out on the workbench server, and workstation of the same type only needs to handle once on server, and each workstation can both normally use; Intranet adopts no dish mode, and has increased the safety management link when inside and outside message exchange, has blocked from the inlet of client infective virus, has reduced the probability of Intranet infective virus; Server end carries out suitable authority setting, and unifies to carry out data backup, can stop misoperation of users or malicious sabotage effectively, and therefore the office application network that uses the present invention to make up has very high reliability and very low maintenance workload.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is that the network of method of the present invention connects topological diagram.
Fig. 2 is the block scheme that extranets information and internal network information exchange.
Fig. 3 is an interconnection device principle structure block diagram of the present invention.
Fig. 4 is the structural representation that category-5 cable of the present invention is shared connector.
Fig. 5 is the circuit theory diagrams of interconnection device embodiment 1 of the present invention.
Fig. 6 is the circuit theory diagrams of interconnection device embodiment 2 of the present invention.
Referring to Fig. 1,1 is interconnection device of the present invention, and 2 is the Intranet Platform Server, and 3 is the outer net Platform Server, and 4 is Intranet hub (or switch), and 5 is outer net hub (or switch), and 6 is the teller work station.
Embodiment: set up one or more Intranet Platform Server 2 respectively, each teller work station 6 is connected into Intranet hub (or switch) 4 by interconnection device 1 of the present invention, is connected into internal network in the mode of no dish (or terminal) by Intranet Platform Server 2.Set up one or more outer net Platform Server 3 respectively, teller work station 6 is connected into outer net hub (or switch) 5 by interconnection device 1 of the present invention, is connected into external network in the mode of no dish (or terminal) by outer net Platform Server 3; After interconnection device of the present invention 1 control, the user who possesses the autonomous ability of maintenance still can directly be connected with outer net by the dish mode is arranged, but the mode that can only adopt no dish that is connected of user and Intranet.
As shown in Figure 2, it is to realize by the safety management post is set that the information of extranets (comprising media such as extranets, CD or floppy disk) and the information of in-house network exchange, be that the information of extranets is when entering in-house network, to pass to the safety officer earlier, through after safety officer's the examination, just information is put into in-house network by the safety officer; When the information of in-house network will output to extranets, pass to the safety officer earlier,, just information be issued extranets and use by the safety officer through after safety officer's the examination.Safety officer's censorship content comprises that virus detects, whether meets in-house network administrative provisions, concerning security matters grade ... or the like.
Referring to Fig. 3,11 is the network interface handover module, and 12 is the external memory interface handover module, and 13 is the switching controls module.111 is the change-over switch group, and 112 is the network interface card interface, and 113,114 is outer connector; 121 is the change-over switch group, and 122 is interior connector, and 123 is outer connector; 131 for triggering combined switch, and 132 is status indicator lamp.
As shown in Figure 3, interconnection device of the present invention is made up of network interface handover module 11, external memory interface handover module 12, switching controls module 13; This interconnection device has at least one signal input end, in order to input control order; At least one network interface card interface 112 is arranged, in order to connect the teller work station network interface card; More than one outer connector 113,114 is in order to connect inside and outside network; More than one host interface 122 is in order to connect main frame; More than one external storage interface 123 is in order to connect external storage; Network interface card interface 112 is arranged in the network interface handover module 11, and outer connector 113,114 has host interface 122 and external storage interface 123 in the external memory interface handover module 12.
Change-over switch group 111,121 can be relay switch or electronic switch (as four bidirectional analog switch CD4066, three group of two path analoging switch CD4053 etc.) or tri-state switch.
The outer connector 113,114 that connects intranet and extranet can be two stand-alone interfaces, also can unite two into one, when comprehensive wiring system had two category-5 cables, the outer connector that connects intranet and extranet disposed two, is connected to outer net, Intranet hub (or switch) 4,5 respectively by two category-5 cables; When comprehensive wiring system only had a category-5 cable, one of the outer connector configuration that connects intranet and extranet got final product, and shares a category-5 cable with being connected of Intranet, outer net.When the teller work station was connected with in-house network, the change-over switch group 121 in the external memory interface handover module (12) made interface 122 disconnections of interface 123 with the main frame of external storage.When main frame was connected with extranets in no dish mode, the change-over switch group 121 in the external memory interface handover module (12) made interface 122 disconnections of interface 123 with the main frame of external storage; When main frame was connected with extranets so that the dish mode to be arranged, the change-over switch group 121 in the external memory interface handover module (12) made the interface 123 of external storage be communicated with the interface 122 of main frame.
As shown in Figure 4, category-5 cable of the present invention is shared connector 7 and is designed for the problem that solves the system that finishes comprehensive wiring and a category-5 cable is only arranged and should how to connect Intranet and outer net simultaneously, when comprehensive wiring system only has a category-5 cable, make a shared category-5 cable of user and being connected of Intranet or outer net.Comprise a comprehensive joint 71, Intranet joint 72, an outer net joint 73.1,2,3, the 6 pin difference correspondence of comprehensive joint 71 is linked to each other with 1,2,3,6 pin of Intranet joint 72,4,5,7,8 pin of comprehensive joint 71 are corresponding respectively to link to each other with 1,2,3,6 pin of outer net joint 73, comprehensive joint 71 is connected intranet and extranet with the interconnection device of the present invention outer connector 113 that unites two into one or 114 links to each other, Intranet joint 72 links to each other with Intranet hub (or switch) 4, and outer net joint 73 links to each other with outer net hub (or switch) 5.
As shown in Figure 5, in embodiments of the invention 1, the method according to this invention is according to network topological diagram building network system shown in Figure 1.Interconnection device design of the present invention is as follows: the triggering combined switch 131 of the switching controls module 13 in the interconnection device of the present invention adopts mechanical combined switch; The change-over switch group of two interface switching modules 11,12 in the interconnection device of the present invention adopts relay switch; External memory interface handover module 12 in the interconnection device of the present invention is used for controlling the power interface of external storage; Comprehensive wiring system only has a category-5 cable, and the outer connector of the connection intranet and extranet of the network interface handover module 11 in the interconnection device of the present invention unites two into one, and shares comprehensive joint 71 realizations of connector 7 and being connected of inside and outside net by category-5 cable.
When the drawing handle K that triggers combined switch 131 by next time, A, B connect once (loose one's grip back A, B disconnect), produce a RESET signal to mainboard, and main frame is restarted; E and G keep connection, F and H to keep connecting (can not disconnect after loosing one's grip, remain to next time drawing handle K presses always) simultaneously; At this moment, the relay adhesive of the change-over switch group of two interface switching modules 11,12,1,2,3,6 pin that connect the network interface card interface 112 of teller work station network interface card are connected with 4,5,7,8 pin of comprehensive joint 71 respectively, and each pin that connects the power interface 122 of user job station host is connected with each pin of the power interface 123 that is connected external storage respectively; At this moment, status indicator lamp 132 is bright, represents current being on the extranets.
When the drawing handle K that triggers combined switch 131 again by next time, A, B connect once (loose one's grip back A, B disconnect), produce a RESET signal to mainboard, and main frame is restarted; E keeps disconnection, F to keep disconnecting (can not be communicated with after loosing one's grip, remain to next time drawing handle K presses always) with H with G simultaneously; At this moment, the relay of the change-over switch group of two interface switching modules 11,12 can not adhesive, 1,2,3,6 pin that connect the network interface card interface 112 of teller work station network interface card are connected with 1,2,3,6 pin of comprehensive joint 71 respectively, each pin that connects the power interface 122 of user job station host disconnects with each pin of the power interface 123 that is connected external storage respectively, and external storage can not be worked; At this moment, status indicator lamp 132 goes out, and represents current being on the in-house network.
As shown in Figure 6, in embodiments of the invention 2, the method according to this invention is according to network topological diagram building network system shown in Figure 1.Interconnection device design of the present invention is as follows: the triggering combined switch 131 of the switching controls module 13 in the interconnection device of the present invention adopts mechanical combined switch; The change-over switch group of two interface switching modules 11,12 in the interconnection device of the present invention adopts relay switch; External memory interface handover module 12 in the interconnection device of the present invention is used for controlling the data-interface of external storage; Comprehensive wiring system has two category-5 cables, the outer connector of the connection intranet and extranet of the network interface handover module 11 in the interconnection device of the present invention has two, promptly 113,114, outer connector 113 is connected with outer net hub (or switch) 5, and interface 114 is connected with Intranet hub (or switch) 4.
When the drawing handle K that triggers combined switch 131 by next time, A, B connect once (loose one's grip back A, B disconnect), produce a RESET signal to mainboard, and main frame is restarted; E and G keep connection, F and H to keep connecting (can not disconnect after loosing one's grip, remain to next time drawing handle K presses always) simultaneously; At this moment, the relay adhesive of the change-over switch group of two interface switching modules 11,12,1,2,3,6 pin that connect the network interface card interface 112 of teller work station network interface card are connected with 1,2,3,6 pin of outer connector 113 respectively, be connected to outer net hub (or switch) 5, each pin that connects the data-interface 122 of user job station host is connected with each pin of the data-interface 123 that is connected external storage respectively; At this moment, status indicator lamp 132 is bright, represents current being on the extranets.
When the drawing handle K that triggers combined switch 131 again by next time, A, B connect once (loose one's grip back A, B disconnect), produce a RESET signal to mainboard, and main frame is restarted; E keeps disconnection, F to keep disconnecting (can not be communicated with after loosing one's grip, remain to next time drawing handle K presses always) with H with G simultaneously; At this moment, the relay of the change-over switch group of two interface switching modules 11,12 can not adhesive, 1,2,3,6 pin that connect the network interface card interface 112 of teller work station network interface card are connected with 1,2,3,6 pin of interface 114 respectively, each pin that connects the data-interface 122 of user job station host disconnects with each pin of the data-interface 123 that is connected external storage respectively, and external storage can not be worked; At this moment, status indicator lamp 132 goes out, and represents current being on the in-house network.
Claims (9)
1, a kind of method that makes up the office application network is characterized in that may further comprise the steps:
1. utilize no dish networking technology, set up one or more internal network system works Platform Server (2) respectively, each workstation (6) is connected into internal network in the mode of no dish or terminal by internal network system works Platform Server (2);
2. utilize no dish networking technology, set up one or more external network system works Platform Server (3) respectively, each workstation (6) is connected into extranets in the mode of no dish or terminal by external network system works Platform Server (3);
3. the user uses interconnection device (1) upward to realize being connected respectively with intranet and extranet at same workstation (6); Described interconnection device (1) is made up of network interface handover module (11), external memory interface handover module (12), switching controls module (13); This interconnection device has at least one signal input end, in order to input control order; At least one network interface card interface (112) is arranged, in order to connect the teller work station network interface card; More than one outer connector (113), (114) are in order to connect inside and outside network; More than one host interface (122) is in order to connect main frame;
More than one external storage interface (123) is in order to connect external storage; Switching controls module (13) has at least one input end in order to input control order, and at least 2 output terminals are arranged, and the input end with network interface handover module (11), external memory interface handover module (12) is connected respectively; Network interface card interface (112) is arranged in the network interface handover module (11), outer connector (113), (114), network interface handover module (11) has at least one input end to be connected with the output terminal of switching controls module (13), one group of change-over switch (111) is arranged, an interface (112) that is used to connect the teller work station network interface card in this group change-over switch, one or two outer connector (113) that is used to connect intranet and extranet, (114), change-over switch (111) has the output terminal of 2 groups of different conditions, can with the teller work station network interface card that is connected with network interface card interface (112) respectively with outer connector (113), (114) connection or disjunction; External memory interface handover module (12) has at least one input end to be connected with the output terminal of switching controls module (13), one group of change-over switch (121) is arranged, several connect the interface (122) of user job station host, several connect the interface (123) of external storage in this group change-over switch, after entering the external memory interface handover module from the control signal of switching controls module, the connection and the disjunction of control its switch group (121), thereby main control system interface (122) is communicated with and disjunction with external storage interface (123), the access of control external storage.
2, a kind of method that makes up the office application network according to claim 1, it is characterized in that: the information of extranets and the information of in-house network exchange by the safety management post is set and realize, be that the information of extranets is when entering in-house network, to pass to the safety officer earlier, through after safety officer's the examination, just information is put into in-house network by the safety officer; When the information of in-house network will output to extranets, pass to the safety officer earlier,, just information be issued extranets by the safety officer through after safety officer's the examination.
3, a kind of method that makes up the office application network according to claim 1 is characterized in that: after the control by interconnection device (1), workstation (6) still can be connected with extranets by the dish mode is arranged.
4, a kind of interconnection device that makes up the office application network is characterized in that this interconnection device is made up of network interface handover module (11), external memory interface handover module (12), switching controls module (13); This interconnection device has at least one signal input end, in order to input control order; At least one network interface card interface (112) is arranged, in order to connect the teller work station network interface card; More than one outer connector (113), (114) are in order to connect inside and outside network; More than one host interface (122) is in order to connect main frame; More than one external storage interface (123) is in order to connect external storage; Switching controls module (13) has at least one input end in order to input control order, and at least 2 output terminals are arranged, and the input end with network interface handover module (11), external memory interface handover module (12) is connected respectively; Network interface card interface (112) is arranged in the network interface handover module (11), outer connector (113), (114), network interface handover module (11) has at least one input end to be connected with the output terminal of switching controls module (13), one group of change-over switch (111) is arranged, a network interface card interface (112) that is used to connect the teller work station network interface card in this group change-over switch, one or two outer connector (113) that is used to connect intranet and extranet, (114), change-over switch (111) has the output terminal of 2 groups of different conditions, can with the teller work station network interface card that is connected with network interface card interface (112) respectively with outer connector (113), (114) connection or disjunction; External memory interface handover module (12) has at least one input end to be connected with the output terminal of switching controls module (13), one group of change-over switch (121) is arranged, several connect the interface (122) of user job station host in this group change-over switch, and several connect the interface (123) of external storage.
5, the interconnection device of structure office application network according to claim 4 is characterized in that, the change-over switch group (111) in the network interface handover module (11) can be relay switch or electronic switch, tri-state switch.
6, the interconnection device of structure office application network according to claim 4 is characterized in that, the change-over switch group (121) in the external memory interface handover module (12) can be relay switch or electronic switch, tri-state switch.
7, the interconnection device of structure office application network according to claim 4 is characterized in that, switching controls module (13) comprises triggering combined switch (131), status indicator lamp (132); This switching controls module (13) can be caused host panel or be caused the outside shaping separately of mainframe box by lead-in wire; Triggering combined switch (131) can be mechanical combined switch, also can be electronic combination switch, this triggering combined switch (131) and network interface handover module (11), external memory interface handover module (12) also join with the reset signal pin (14) of mainboard when being connected.
8, the interconnection device of structure office application network according to claim 4 is characterized in that this interconnection device can make the integrated circuit board form, is inserted in the expansion slot of office application mainboard; Also can make box-packed form, be installed on the erecting frame of CD-ROM drive or floppy drive; Also can make, network interface card be become possess the multi-functional network interface card of this interconnection device with network card binding.
9, the interconnection device of structure office application network according to claim 4, it is characterized in that, in this interconnection device, there is a category-5 cable to share connector (7), this connector (7) comprises a comprehensive joint (71), an Intranet joint (72), an outer net joint (73), and 1,2,3,6 pin of comprehensive joint (71) link to each other with 1,2,3,6 pin of Intranet joint (72) respectively; 4,5,7,8 pin of comprehensive joint (71) are corresponding respectively to link to each other with 1,2,3,6 pin of outer net joint (73); Comprehensive joint (71) links to each other with outer connector (113) or outer connector (114); Intranet joint (72) links to each other with Intranet hub (4); Outer net joint (73) links to each other with outer net hub (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021396590A CN1185585C (en) | 2002-09-27 | 2002-09-27 | Method of constructing office work application network and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021396590A CN1185585C (en) | 2002-09-27 | 2002-09-27 | Method of constructing office work application network and its device |
Publications (2)
| Publication Number | Publication Date |
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| CN1410897A CN1410897A (en) | 2003-04-16 |
| CN1185585C true CN1185585C (en) | 2005-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021396590A Expired - Fee Related CN1185585C (en) | 2002-09-27 | 2002-09-27 | Method of constructing office work application network and its device |
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| CN (1) | CN1185585C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375441C (en) * | 2005-01-18 | 2008-03-12 | 英业达股份有限公司 | Network connectivity backup system |
| CN100375440C (en) * | 2005-01-18 | 2008-03-12 | 英业达股份有限公司 | Network connectivity backup system |
| CN103049697B (en) * | 2012-11-26 | 2017-12-05 | 北京奇安信科技有限公司 | For the file test method and system of enterprise |
| CN106021156A (en) * | 2016-05-31 | 2016-10-12 | 国网江西省电力公司南昌供电分公司 | Device for fast switch of USB equipment between intranet computer and common computer |
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| Publication number | Publication date |
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| CN1410897A (en) | 2003-04-16 |
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