CN209657230U - A kind of computer network security course teaching computer based on virtualization technology - Google Patents

A kind of computer network security course teaching computer based on virtualization technology Download PDF

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Publication number
CN209657230U
CN209657230U CN201920875338.XU CN201920875338U CN209657230U CN 209657230 U CN209657230 U CN 209657230U CN 201920875338 U CN201920875338 U CN 201920875338U CN 209657230 U CN209657230 U CN 209657230U
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China
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part body
network security
heat dissipation
computer
virtualization technology
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Expired - Fee Related
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CN201920875338.XU
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Chinese (zh)
Inventor
秦燊
劳翠金
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Individual
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Abstract

The utility model discloses a kind of computer network security course teaching computer based on virtualization technology, including top body and lower part body, the lower part body is internally provided with main frame, the main frame is connect with high speed network transmission channel, the main frame is connected to network storage server by high speed network transmission channel, door-plate is radiated with good mosquito barrier effect by the side of setting, mosquito is effectively avoided to enter the damage to inner body, lower part body built-in computer host is convenient for carrying out dilatation operation with hard-disc storage to calculator memory and be upgraded to hardware, lower part body connects high speed network transmission channel, convenient for derived EVE-NG experiment compressed package is classified in high-speed transfer and storage to server, and it is downloaded from server high speed and imports EVE-NG Experiment compressed package is tested into EVE-NG virtual platform, is also convenient in interim upload backup VMware virtual machine snapshot to server.

Description

A kind of computer network security course teaching computer based on virtualization technology
Technical field
The utility model belongs to the technical field of the computer network of respective fictional technology, and in particular to one kind is based on virtual The computer network security course teaching computer of change technology.
Background technique
Computer network security guard technology relate to the hardware security of computer network, software security, LAN safety, The every aspects such as wide area network safety.Implement computer network security protection related experiment, it is necessary to set up Small-scale LAN, The hardware environment of large-scale wide area network, and be equipped with windows server target drone, Linux server target drone, Web server target drone etc. It is soft by the software environment of object of attack, and to the Kali linux system of these target drones implementation network security penetration testing attack Part environment.The environment for constructing such scale on one computer is being unrealistic, past virtualization technology in the past Can only independent emulating server, or the individually simulation network equipments such as router, or the individually safety equipments such as simulation firewall will They interconnect one project environment of composition, and there are bigger difficulty.We, which pass through, uses newest virtualization technology, passes through Integrate VMware Workstation, EVE-NG, Kali Linux network security Permeation Test System, Metasploit network peace Full penetration testing tool, windows server target drone, Linux server target drone, the website DVWA target drone, realize and count at one On calculation machine, the implementation environment of the computer network security prevention of various scales is simulated.
Since network attack and guard technology are quickly grown, it is often necessary to carry out dilatation to calculator memory and hard-disc storage It operates and hardware is upgraded, in addition, it is necessary to carry out the management such as additions and deletions change to network security attacking and defending case, need to the stage Property VMware virtual machine state carry out snapshot shooting, for this purpose, it is proposed that a kind of computer network based on virtualization technology The safe course teaching computer of network.On the one hand, by the improvement in structure, convenient for being carried out to calculator memory and hard-disc storage Dilatation operates and upgrades to hardware, avoids mosquito from being easy to enter inside from heat dissipation hole, computer hardware is caused to damage Bad problem;On the other hand, by high speed network transmission channel, convenient for derived EVE-NG is tested compressed package, classification high speed In transimission and storage to server, and is downloaded from server high speed and import EVE-NG experiment compressed package to EVE-NG virtualization It is tested, is also convenient in high-speed uploading VMware virtual machine snapshot to server in platform.
Utility model content
The computer network security course teaching that the purpose of this utility model is to provide a kind of based on virtualization technology is used Computer, to solve existing computer network security course teaching computer mentioned above in the background art in placement When, it is not easy to carry out dilatation operation with hard-disc storage to calculator memory and hardware is upgraded, mosquito is easy from heat dissipation Inside is entered in hole, thus the problem of causing computer-internal damage of components, while high speed network transmission channel is used, Convenient for derived EVE-NG is tested compressed package, classification high-speed transfer and storage on network storage server, and from network High-speed downloads import EVE-NG experiment compressed package and are tested into EVE-NG virtual platform in storage server, are also convenient for rank In the upload VMware virtual machine snapshot to network storage server of section property, and obtain at a high speed from network storage server VMware virtual machine snapshot.
To achieve the above object, the utility model provides the following technical solutions:
A kind of computer network security course teaching computer based on virtualization technology, including top body and lower part Body, the top body are fixed on the upper end position of lower part body, and the lower part body is internally provided with calculating Machine host is provided with exented memory slot on the main frame, and is provided with heat on main frame and dials slotting high speed hard-disk Interface, the main frame are connect with high speed network transmission channel, and the main frame passes through high speed network transmission channel It is connected to network storage server, the upper end of the top body is provided with top arm-rest frame, the top arm-rest frame and top Body junction is provided with hollow out barrier plate, and computer screen, the top are provided among the front end of the top arm-rest frame Input operating device is provided on the inside of arm-rest frame, blissful something that gives the game away wheel, the lower part body is arranged in the lower end of the lower part body Both ends be provided with side protection board, maintenance heat dissipation door-plate is provided on the right side of the front end of the lower part body, the maintenance is radiated The left side of door-plate, which is located on the body of lower part, is provided with side heat dissipation door-plate, and the side heat dissipation door-plate includes right angle stopper, turns Moving axis column, heat dissipation hole, closure door lock and metal panels, the both ends of the metal panels are provided with rotation jack-post, the metal The centre of door-plate is provided with closure door lock, and the outside of the closure door lock, which is located in metal panels, is provided with heat dissipation hole, described The outside of heat dissipation hole, which is located in metal panels, is provided with right angle stopper, and the rotation jack-post is connected on the body of lower part, institute It states lower part body and external power supply is electrically connected.
Preferably, the good fortune something that gives the game away wheel includes rolling wheel case, Metal Contact Rollers, is fixedly connected with block and support housing, described solid The lower end for determining link block is provided with support housing, and the support housing is internally provided with rotation adjustable column, the support housing Outside be provided with rolling wheel case, the rolling wheel case is internally provided with Metal Contact Rollers, and the block that is fixedly connected is connected to down On portion's body.
Preferably, the top arm-rest frame includes fixed-length block, grafting pillar and handrail side block, the fixed-length block Lower end is provided with grafting pillar, and the both ends of the fixed-length block are provided with handrail side block, and the fixed-length block is convex by grafting Column is connected on the body of top.
Preferably, there are four the good fortune something that gives the game away wheel is arranged altogether, and the good fortune something that gives the game away wheel is fixed on lower part body in parallel In the corner of lower end four.
Preferably, the top arm-rest frame and top body be by being plugged and fixed connection, and the top arm-rest frame and upper On the outside of the junction of portion's body on same straight line.
Preferably, the side protection board is weldingly fixed on the body of lower part, and the side protection board and lower part body Outside be on same straight line.
Preferably, there are two the hollow out barrier plate is arranged altogether, and the hollow out barrier plate is fixed on top handrail in parallel Between frame and top body.
Compared with prior art, the utility model provides a kind of computer network security course based on virtualization technology Teaching use computer, have it is following the utility model has the advantages that
1, the utility model computer network security course teaching computer passes through right angle stopper, rotation jack-post, dissipates Side heat dissipation door-plate composed by hot hole hole, closure door lock and metal panels has good mosquito barrier effect, when mosquito is logical When crossing the heat dissipation holes of metal panels and enter, it will be stopped by the right angle stopper on rear side of heat dissipation hole, and right angle stops Block and metal panels gap are smaller, so that mosquito is not easily accessible, so that mosquito is turned one's head, so when in use, effectively avoid Mosquito enters the damage to inner body.
2, the utility model computer network security course teaching with computer when in use, open side radiate door Plate, to open top body power switch, so that computer can be very good to carry out to use and top body and lower part body Inside chip can be very good operation based on the virtualization technologies such as VMware, EVE-NG, and incorporate Kali Linux, A kind of network security attacking and defending training platform that PhpStudy, DVWA, windows and Linux target target drone etc. constructs, so that It can be used on the attack and defense training that computer network security is imparted knowledge to students, so that the Integral computer can be virtualized The rehearsal and simulation of technology use.
3. the utility model computer network security course teaching when in use, opens side heat dissipation door with computer Plate can be carried out the dilatation of memory by the exented memory slot that built-in computer host is matched, can pass through built-in computer host The heat matched dials slotting high speed hard-disk interface and carries out dilatation to hard-disc storage, quickly grows band to adapt to network attack and guard technology The update and upgrading of the Network Security Teaching experiment come.
4. the utility model computer network security course teaching computer is connect with high speed network transmission channel, can incite somebody to action Derived EVE-NG tests compressed package, in classification high-speed transfer and storage to network storage server, and takes from network storage High-speed downloads import EVE-NG experiment compressed package and are tested into EVE-NG virtual platform on business device, can be to network security Attacking and defending experiment carries out the management such as additions and deletions change.
5. the utility model computer network security course teaching computer is connect with high speed network transmission channel, just It is obtained at a high speed in high-speed uploading VMware virtual machine snapshot to network storage server, and from network storage server VMware virtual machine snapshot.The snapshot functions that can use virtual machine are not easy to build, are not easy to reuse to solution real training scene And real equipment can not for real training different phase be arranged breakpoint the problem of.Scene is built using virtual machine, is different scenes Make snapshot, it can be achieved that different real training scene rapid simulation.Use prototype equipment may be due to operation error during real training And need to spend a lot of time and build scene again, and virtual machine only need to be simply restored at certain breakpoint with the very short time and can be continued Real training.
6. past virtualization technology is also only at the dummy run phase, still there is certain difference with true environment, especially The Network Security Devices such as firewall, from version to functionally, there is difference compared with real equipment.As virtualization technology exists Extensive use in cloud computing, the network and safety equipment product of all big enterprises' production not only have hardware version, also there is virtualization Version, virtualization product was both sold as product, can also be run in EVE simulated virtual environment.Enable student completely manipulate with The consistent experimental situation of true production circumstances, realization are docked with enterprise work environment zero;Increase the learning interest of student, enhancing is learned Raw manipulative ability;Have more potential for development student and competitiveness.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention, in the accompanying drawings:
Fig. 1 be the utility model proposes a kind of computer network security course teaching based on virtualization technology calculate Machine structural schematic diagram;
Fig. 2 be the utility model proposes good fortune something that gives the game away wheel construction schematic diagram;
Fig. 3 be the utility model proposes top arm-rest frame structural schematic diagram;
Fig. 4 be the utility model proposes side radiate door panel structure schematic diagram;
Fig. 5 be the utility model proposes computer mainframe structure schematic diagram;
In figure: 1, computer screen;2, top arm-rest frame;21, fixed-length block;22, grafting pillar;23, handrail side block; 3, input operating device;4, top body;5, lower part body;6, radiate door-plate for side;61, right angle stopper;62, rotation axis Column;63, radiate hole;64, it is closed door lock;65, metal panels;7, good fortune something that gives the game away wheel;71, rolling wheel case;72, Metal Contact Rollers;73, It is fixedly connected with block;74, support housing;75, adjustable column is rotated;8, maintenance heat dissipation door-plate;9, hollow out barrier plate;10, side is protected Plate;11, main frame;12, exented memory slot;13, heat dials slotting high speed hard-disk interface.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-5 is please referred to, the utility model provides a kind of technical solution:
A kind of computer network security course teaching computer based on virtualization technology, including top body 4 is under Portion's body 5, top body 4 are fixed on the upper end position of lower part body 5, and lower part body 5 is internally provided with computer Host 11 is provided with exented memory slot 12 on main frame 11, and is provided with heat on main frame 11 and dials that insert high speed hard Disk interface 13, main frame 11 are connect with high speed network transmission channel, and main frame 11 passes through high speed network transmission channel It is connected to network storage server, the upper end of top body 4 is provided with top arm-rest frame 2, top arm-rest frame 2 and top body 4 By the way that connection is plugged and fixed, and on the outside of the junction of top arm-rest frame 2 and top body 4 on same straight line, top handrail Frame 2 includes fixed-length block 21, grafting pillar 22 and handrail side block 23, and the lower end of fixed-length block 21 is provided with grafting pillar 22, The both ends of fixed-length block 21 are provided with handrail side block 23, and fixed-length block 21 is connected on top body 4 by grafting pillar 22. When in use, because outside is fixedly mounted on same straight line in top body 4 and lower part body 5 so that use when Time will not hinder, and top arm-rest frame 2 and top body 4 be by being plugged and fixed connection, in this way when installing more It is convenient, and outside is on same straight line, will not be hindered when in use in this way, and top arm-rest frame 2 passes through admittedly The handrail side block 23 at 21 both ends of fixed-length block, plays good booster action, hand can be very good to hold when such personnel stand It firmly supports, so that more comfortable when imparting knowledge to students use.
A kind of computer network security course teaching computer based on virtualization technology, including 2 He of top arm-rest frame Body 4 junction in top is provided with hollow out barrier plate 9, and there are two the total settings of hollow out barrier plate 9, and hollow out barrier plate 9 is solid in parallel It is scheduled between top arm-rest frame 2 and top body 4.When in use, it is fixed, is made by the pulling force of two hollow out barrier plates 9 It obtains top arm-rest frame 2 and the fixation of top body 4 is more stable, and when in use, hollow out barrier plate 9 plays good resistance Gear effect rolls so that avoiding placing object, and the problem of fallen from side.
A kind of computer network security course teaching computer based on virtualization technology, including top arm-rest frame 2 It is provided with computer screen 1 among front end, the inside of top arm-rest frame 2 is provided with input operating device 3, under lower part body 5 Blissful something that gives the game away wheel 7 is arranged in end, and there are four the total settings of good fortune something that gives the game away wheel 7, and good fortune something that gives the game away wheel 7 is fixed under lower part body 5 in parallel It holds in four corners, good fortune something that gives the game away wheel 7 includes rolling wheel case 71, Metal Contact Rollers 72, is fixedly connected with block 73 and support housing 74, Gu The lower end for determining link block 73 is provided with support housing 74, and support housing 74 is internally provided with rotation adjustable column 75, support housing 74 outside is provided with rolling wheel case 71, and rolling wheel case 71 is internally provided with Metal Contact Rollers 72, is fixedly connected with block 73 and is connected to On lower part body 5.When in use, it can be very good to carry out information input use by input operating device 3, and placing Or when mobile, made by four good fortune something that gives the game away wheels 7 more convenient when placement or movement, when placing, led to The rotation adjustable column 75 crossed inside support housing 74 carries out rotation decline, so that rotation adjustable column 75 and ground face contact, make Metal Contact Rollers 72 and ground is obtained to separate, so that it is more stable when support, and when mobile, pass through and rotates adjustable column 75 carry out rotation contraction, so that 71 interior metal idler wheel 72 of rolling wheel case and ground face contact, and rotate adjustable column 75 and ground distributor From so that more convenient when mobile, and rolling wheel case 71 and 74 activity of support housing are fixed, so as to well into Row turns to, more convenient when mobile in this way.
A kind of computer network security course teaching computer based on virtualization technology, two including lower part body 5 End is provided with side protection board 10, and side protection board 10 is weldingly fixed on lower part body 5, and side protection board 10 and lower part machine The outside of body 5 is on same straight line, and maintenance heat dissipation door-plate 8 is provided on the right side of the front end of lower part body 5.When in use, Lower part body 5 is protected by the side protection board 10 on the outside of both ends, thus be less likely to occur to damage, and side protection board 10 It is on same straight line, will not hinder when in use in this way, so that when in use with the outside of lower part body 5 It is more convenient.
A kind of computer network security course teaching computer based on virtualization technology, including maintenance heat dissipation door-plate 8 Left side be located on lower part body 5 be provided with side heat dissipation door-plate 6, side radiate door-plate 6 include right angle stopper 61, rotation axis Column 62, heat dissipation hole 63, closure door lock 64 and metal panels 65, the both ends of metal panels 65 are provided with rotation jack-post 62, metal The centre of door-plate 65 is provided with closure door lock 64, and the outside of closure door lock 64, which is located in metal panels 65, is provided with heat dissipation hole 63, the outside of heat dissipation hole 63, which is located in metal panels 65, is provided with right angle stopper 61, and rotation jack-post 62 is connected to lower part machine On body 5, lower part body 5 and external power supply are electrically connected.When in use, lower part body 5 passes through side heat dissipation door-plate 6 and inspection Heat dissipation door-plate 8 is repaired to radiate, so that when in use, the damage of 5 internal part of lower part body is effectively avoided, and side dissipates Popular plate 6 and maintenance heat dissipation door-plate 8 are using identical mosquito-proof mode, so that mosquito is directly entered when avoiding placing, and side dissipates The rotation jack-post 62 of popular plate 6 is connected on lower part body 5, when allowing to be rotated well, and be closed, is passed through Closure door lock 64 in metal panels 65 allows to be fixed well, when mosquito passes through the heat release hole of metal panels 65 When hole 63 enters, it will be stopped by the right angle stopper 61 of 63 rear side of heat dissipation hole, and right angle stopper 61 and metallic door 65 gap of plate is smaller, so that mosquito is not easily accessible, so that mosquito is turned one's head, so when in use, effectively mosquito is avoided to enter Damage to inner body, and right angle stopper 61 is high efficiency and heat radiation metal, is radiated in this way by the hole 63 that radiates, So that more efficient when heat dissipation.
The working principle and process for using of the utility model: after the utility model installs, so that it may by computer network The safe course teaching of network is moved on designated position place with computer and be used.And when movement or placement, lead to The good fortune something that gives the game away wheel 7 of lower part body 5 lower end four corner is crossed, so that more convenient when movement or placement stablize.And good fortune Something that gives the game away wheel 7 is by rolling wheel case 71, Metal Contact Rollers 72, is fixedly connected with block 73 and support housing 74 is formed, and is being placed in this way When, rotation decline is carried out by the rotation adjustable column 75 inside support housing 74, so that rotation adjustable column 75 and ground Face contact thus can be very good to be supported placement use so that Metal Contact Rollers 72 and ground will be made to separate.And When mobile, rotation contraction is carried out by rotating adjustable column 75, so that 71 interior metal idler wheel 72 of rolling wheel case connects with ground Touching can thus to rotate adjustable column 75 and surface separation, allow to pass through Metal Contact Rollers 72 well and be moved.This After sample movement places, the electric connection of lower part body 5 Yu external power supply is connected.
When use, opens side heat dissipation door-plate 6 and allow to well to open 4 power switch of top body Carry out using.And top body 4 and 5 inside chip of lower part body can be very good operation and be based on VMware, EVE-NG etc. virtually Change technology, and incorporate Kali Linux, PhpStudy, DVWA, windows and Linux target target drone etc. and construct A kind of network security attacking and defending training platform, allows to the attack and defense training for imparting knowledge to students in computer network security.
When use, the high speed network transmission channel that lower part body 5 connects is compressed for testing derived EVE-NG Packet, classification high-speed transfer and storage on server, and download from server high speed import EVE-NG test compressed package to It is tested in EVE-NG virtual platform, is also convenient for uploading in VMware virtual machine snapshot to server.
When upgrading, side heat dissipation door-plate 6, the exented memory slot 12 matched by built-in computer host 11 are opened Internally deposit into row upgrade expanding, the heat matched by built-in computer host 11 dial slotting high speed hard-disk interface 13 to hard-disc storage into Row upgrade expanding, cooperation network attack and guard technology quickly grow update and the liter of bring Network Security Teaching experiment content Grade.
And when placing, because side heat dissipation door-plate 6 has good anti-mosquito functions, so that when in use more Increase effect.And side heat dissipation door-plate 6 is by right angle stopper 61, rotation jack-post 62, heat dissipation hole 63, closure door lock 64 and gold Belong to door-plate 65 to be formed, it, will be by heat dissipation hole in this way when mosquito is entered by the heat dissipation hole 63 of metal panels 65 The right angle stopper 61 of 63 rear sides stops, and right angle stopper 61 and 65 gap of metal panels are smaller, so that mosquito is not easily accessible, To which mosquito is turned one's head, so when in use, mosquito is effectively avoided to enter the damage to inner body.And side heat dissipation door Plate 6 and maintenance heat dissipation door-plate 8 are using identical mosquito-proof mode, so that mosquito is directly entered when avoiding placing, so that improving meter The service life of calculation machine network security course teaching computer.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (7)

1. a kind of computer network security course teaching computer based on virtualization technology, including top body (4) and under Portion's body (5), it is characterised in that: the top body (4) is fixed on the upper end position of lower part body (5), under described Portion's body (5) is internally provided with main frame (11), is provided with exented memory slot on the main frame (11) (12), it and on main frame (11) is provided with heat and dials slotting high speed hard-disk interface (13), the main frame (11) and high speed Network transmission channels connection, the main frame (11) are connected to network storage server by high speed network transmission channel, The upper end of the top body (4) is provided with top arm-rest frame (2), the top arm-rest frame (2) and top body (4) junction It is provided with hollow out barrier plate (9), is provided with computer screen (1) among the front end of the top arm-rest frame (2), the top is helped It is provided on the inside of hand cradle (2) input operating device (3), blissful something that gives the game away wheel (7), institute is arranged in the lower end of the lower part body (5) The both ends for stating lower part body (5) are provided with side protection board (10), and maintenance is provided on the right side of the front end of the lower part body (5) and is dissipated Popular plate (8), the left side of maintenance heat dissipation door-plate (8), which is located on lower part body (5), is provided with side heat dissipation door-plate (6), institute State side heat dissipation door-plate (6) include right angle stopper (61), rotation jack-post (62), heat dissipation hole (63), closure door lock (64) and Metal panels (65), the both ends of the metal panels (65) are provided with rotation jack-post (62), the centre of the metal panels (65) It is provided with closure door lock (64), the outside of closure door lock (64), which is located on metal panels (65), is provided with heat dissipation hole (63), the outside of heat dissipation hole (63), which is located on metal panels (65), is provided with right angle stopper (61), the rotation axis Column (62) is connected on lower part body (5), and the lower part body (5) and external power supply are electrically connected.
2. a kind of computer network security course teaching computer based on virtualization technology according to claim 1, It is characterized by: the good fortune something that gives the game away wheel (7) includes rolling wheel case (71), Metal Contact Rollers (72), is fixedly connected with block (73) and support Shell (74), the lower end for being fixedly connected with block (73) are provided with support housing (74), and the inside of the support housing (74) is set It is equipped with rotation adjustable column (75), is provided with rolling wheel case (71) on the outside of the support housing (74), the rolling wheel case (71) Be internally provided with Metal Contact Rollers (72), the block (73) that is fixedly connected is connected on lower part body (5).
3. a kind of computer network security course teaching computer based on virtualization technology according to claim 1, It is characterized by: the top arm-rest frame (2) includes fixed-length block (21), grafting pillar (22) and handrail side block (23), institute The lower end for stating fixed-length block (21) is provided with grafting pillar (22), and the both ends of the fixed-length block (21) are provided with handrail side block (23), the fixed-length block (21) is connected on top body (4) by grafting pillar (22).
4. a kind of computer network security course teaching computer based on virtualization technology according to claim 1, It is characterized by: there are four the total settings of the good fortune something that gives the game away wheel (7), and the good fortune something that gives the game away wheel (7) is fixed on lower part body in parallel (5) in the corner of lower end four.
5. a kind of computer network security course teaching computer based on virtualization technology according to claim 1, It is characterized by: the top arm-rest frame (2) and top body (4) are by being plugged and fixed connection, and the top arm-rest frame (2) It is on same straight line on the outside of the junction of top body (4).
6. a kind of computer network security course teaching computer based on virtualization technology according to claim 1, It is characterized by: the side protection board (10) is weldingly fixed on lower part body (5), and the side protection board (10) and under The outside of portion's body (5) is on same straight line.
7. a kind of computer network security course teaching computer based on virtualization technology according to claim 1, It is characterized by: there are two the total settings of the hollow out barrier plate (9), and the hollow out barrier plate (9) is fixed on top in parallel and helps Between hand cradle (2) and top body (4).
CN201920875338.XU 2019-06-12 2019-06-12 A kind of computer network security course teaching computer based on virtualization technology Expired - Fee Related CN209657230U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111168211A (en) * 2020-02-24 2020-05-19 夸夫曼(上海)智能科技发展有限公司 Intelligent virtual welding training device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111168211A (en) * 2020-02-24 2020-05-19 夸夫曼(上海)智能科技发展有限公司 Intelligent virtual welding training device and method

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CF01 Termination of patent right due to non-payment of annual fee