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The followers is a web design study for Optichrome Ltd. , a company supplying computing machine animated particular effects for the movie and telecasting industries. The company presently, has a work force of 43 people, including 2 divisional directors and the CEO.
The company is divided into 3 managerial divisions: Selling, Gross saless and Administration ( using 10 people ) , Animation and Modeling ( using 20 people ) , Rendering and Production ( using 10 people ) .
The company intends to lease one complete floor of a three floor office where the design needs to be implemented.
The floor map of the office is shown farther in front in the study.
Two computing machines per employee in the Rendering and Production division where 1 computing machine would be dedicated to the undertaking of rendering beam traced animated frame and has package that requires it to work in a networked bunch with all the other rendering computing machines. The peak informations rate required between any two computing machines is estimated to be approximately 300Mbps.
One computing machine per employee in the Animation and Modeling division with an premise that 2 or 3 computing machines may necessitate to be linked for a undertaking with a peak information rate demand of 50Mbps.
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One computing machine per employee in the Administration, Gross saless and Marketing division where the upper limit expected information rate is 10Mbps.
One computing machine each, for the CEO and the divisional directors, with a maximal information rate of 10Mbps.
The design supports the company to spread out its work force by up to 50 % and the full web would be built around the netID 194.
45.67.0/24 with each division separated utilizing IP subnets and vLANs.
The Network design is based on the Ethernet Local Area Network ( LAN ) engineering and would necessitate the undermentioned internetworking equipments:
The justification for the use of the above mentioned equipments is given below and is evaluated subsequently in the study.
The edifice is equipped with CAT3 based distorted brace overseas telegram web. These overseas telegrams are by and large used for telephone and supply informations rates up to 10Mbps. However, the web demands suggest that the information transportation rates ranges from 10Mbps to 300Mbps across assorted divisions.
To run into these demands, the floor would necessitate to be networked utilizing Category 5 or Category 5e overseas telegrams ( same as CAT6 overseas telegrams ) . The general comparing of the CAT5 and CAT6 over CAT3 overseas telegrams is listed below:
Class
Type
Length
Local area network Applications
Speed
Notes
Cat3
UTP
100m
10Base-T, 4Mbps
Up to 10Mbps
Now chiefly for telephone overseas telegrams
CAT5
UTP
100m
100Base-Tx, ATM, CDDI
Up to 100Mbps
Common for current LANs
CAT5e/CAT6
UTP
100m
1000Base-T
Up to 1Gbps
Common for current LANs
( Anon, 2010 ; Hill and Linge, 2010 )
From the above comparing, the usage of CAT5 and CAT5e/6 overseas telegrams can be justified for the different sections on the floor.
For demands of up to 100Mbps ( i.e. Animation and Modeling division ; Administration, Gross saless and Marketing division ; CEO and the divisional directors ) CAT5 overseas telegrams would be laid out on the floor and for the Rendering and Production division, where the peak transportation rate is 300Mbps, CAT5e overseas telegrams would be laid out.
The full web would be divided into subnets and each division would be allotted a different subnet. The design would use IP subnets and vLANs to accomplish this. Each division would be in a separate vLAN, therefore enabling unity within divisions.
Inter-division communicating will take topographic point through a Layer 3 Switch, which acts as a router, on which assorted entree policies can be employed to guarantee safe informations transportation between divisions.
Therefore, the web would be divided in the undermentioned mode:
Animation and Modeling division would be allocated vLAN 1 ( comprising of 20 computing machines )
Rendering and Production division would be allocated vLAN 2 ( comprising of 20 computing machines )
Administration, Gross saless and Marketing division would be allocated vLAN3 ( consisting of 10 computing machines )
Divisional Directors would be allocated in vLAN 4 ( comprising of 2 computing machines )
CEO would be in independent subnet allocated in vLAN 5 ( 1 computing machine )
For vLAN 1, the 20 computing machines would be connected to a 24 port Layer 2 switch.
Of these each computing machine is operated independently and if needed some computing machines can be linked together for a undertaking.
For vLAN 2, the 20 computing machines would be connected to a 48 port Layer 2 switch.
Of these, 10 computing machines which would be dedicated for the rendition undertakings and demands to be in a web bunch, would be connected on even ports of the switch.
The staying 10 computing machines would be take parting in the rendition undertakings merely during the dark. Therefore, these computing machines would be connected on uneven ports of the switch, which would be inactive during the twenty-four hours and switched on during the dark.
The extra ports could be used in instance the company decides to spread out its work force.
For vLAN 3, the 10 computing machines would be connected to a 24 port Layer 2 switch which would be in a bunch to enable file sharing between office applications.
vLAN 4 and vLAN 5, with 2 computing machines and 1 computing machine severally, would be configured on the same switch on which the vLAN 3 is configured, to avoid wastage of ports on the switch.
This is besides convenient, as the cabling demands for vLAN 3, 4 and 5 are the same i.e. CAT5 overseas telegrams.
( The fresh ports on each of the switches may be utilized in the hereafter when the company plans the enlargement of its work force. )
A Layer 3 Switch, which acts as a router, to which the three L2 switches are connected, would be used to for inter-vLAN routing.
Therefore, all the intra-vLAN communicating would be handled by the Layer 2 Switches and any communicating between vLANs would be routed by the Layer 3 Switch.
The company may take to link the intranet to the external webs / internet if required.
The Layer 3 Switch is used as it relatively cheaper than a router.
Adequate firewalls and policies need to be employed on the L3 Switch, to guarantee assorted inter-vLAN entree limitations and entree regulations between the vLANs and WAN/internet and besides to guarantee that internal web is secure from external onslaughts.
The information transportation demands for vLAN 2 i.e. Rendering and Production division, is a peak rate of 300Mbps. To enable this, CAT5e/6 overseas telegrams are used to web these computing machines. Along with that, each computing machine and the switch ( S2 ) must be equipped with 1Gbps NICs ( Network Interface Cards ) to interface with the high velocity overseas telegrams.
While for the other vLANs, 100Mbps NICs can be used to interface with the CAT5 overseas telegrams ( i.e. for S1 and S3 ) . Each of these switches would be connected to a Layer 3 Switch ( S4 ) .
As per the above mentioned web division, the web design would look like a star topology web shown below:
Figure1: Topological Diagram of the designed web
The links from S2 are wired utilizing the CAT5e/CAT6 overseas telegrams. Whereas, the staying overseas telegrams in the web are CAT5 overseas telegrams.
The design shows how the switches are connected with each other and which vLAN is configured on which switch.
Based on the above topological design, the physical layout of the floor can be shown as per the floor program below:
Figure 2: Physical layout of the designed web
The switches S1, S2 and S3 would be located on the floor as shown in the program. The location of the switches is chosen such that the overseas telegram length demands ( maximal overseas telegram length is 100 metres ) meet the dimensions of the floor.
CAT5 overseas telegrams would be wired in the CEO 's office, the Admin section, the Gross saless and Marketing section, the Animation & A ; Modeling section and the two divisional director 's offices from switch S3.
CAT5e/CAT6 overseas telegrams would be wired in Rendering & A ; Production section from S2.
The location of the switches in the centre of the floor permits the design to run into the length demands of the CAT5 and CAT5e/CAT6 overseas telegrams.
The web is designed around the netID 194.45.67.0/24. The web design would use IP subnets to divide and separate between assorted divisions and sections in the company.
194.45.67.0/24 i? This IP scope would supply 255 functional references to be configured on the web, but all belonging to the same subnet, which does non let segregation of different divisions. Therefore, the technique of IP subnets and vLANs is employed to accomplish this.
As per the current demands, it is clear that the maximal figure of computing machines in any subnet would be 20 ( for Animation and Modeling division & A ; Rendering and Production division )
Therefore, it would be appropriate to utilize a mask of 27 spots ( /27 ) , leting in all 32 host reference to be configured on the subnet.
The 1st subnet would be from: 194.45.67.0 /27 to 194.45.67.31 /27
From the above scope, the first and the last references are the web reference and the broadcast reference of the subnet.
194.45.67.0 /27 i? Network Address
194.45.67.31 /27 i? Broadcast reference
These 2 references can non be used as host references i.e. they can non be configured on to the computing machines.
Therefore, this leaves 30 functional references get downing from 194.45.67.1 /27 to 194.45.67.30 /27.
One IP reference from the above scope demands to be allocated to the port linking S4 ( router ) and S1. This reference becomes the default gateway reference for this subnet on S1.
Let 194.45.67.1 /27 be the default gateway reference for the subnet and references from the scope 194.45.67.2 /27 to 194.45.67.30 /27 to be configured on the 20 computing machines.
Once the hosts are connected, the Switch is configured such that, the ports on which the 20 computing machines and S4 is connected is configured as vLAN 1.
In instance of work force enlargement in the hereafter, this subnet would hold 9 available IP references which can be used.
Similarly, the 2nd subnet would be from: 194.45.67.32 /27 to 194.45.67.63 /27
194.45.67.32 /27 i? Network Address
194.45.67.63 /27 i? Broadcast reference
Therefore, this leaves 30 functional references get downing from 194.45.67.33 /27 to 194.45.67.62 /27.
One IP reference from the above scope demands to be allocated to the port linking S4 and S2. This reference becomes the default gateway reference for this subnet on S2.
Let 194.45.67.33 /27 be the default gateway reference for the subnet and references from the scope 194.45.67.34 /27 to 194.45.67.62 /27 to be configured on the 20 computing machines.
Once the hosts are connected, the Switch is configured such that, the ports on which the 20 computing machines and S4 is connected is configured as vLAN 2.
In instance of work force enlargement, this subnet would hold 9 available IP references which can be used.
Note: As per the design, vLAN 2 is allotted for the Rendering and Production division, where in 10 computing machines, which needs to be in a web would be connected on even numbered ports on the S2 and the staying 10 computing machines would be connected on odd numbered ports on the S2. The uneven numbered ports would be active merely during the dark going a portion of the web.
The following demand is of a subnet to host 10 computing machines in the Administration, Marketing and Gross saless division. Using a mask of /27 would be unwise in such a scenario.
It would be appropriate to utilize a mask of 28 spots ( /28 ) , leting in all 16 host reference to be configured on the subnet.
The 3rd subnet would be from: 194.45.67.64 /28 to 194.45.67.79 /28
194.45.67.64 /28 i? Network Address
194.45.67.79 /28 i? Broadcast reference
This leaves 14 valid host references which get downing from 194.45.67.65 /28 to 194.45.67.78 /28.
One IP reference from the above scope demands to be allocated to the port linking S4 and S3. This reference becomes the default gateway reference for this subnet on S3.
Let the default gateway reference for the subnet be 194.45.67.65 /28 and references from the scope 194.45.67.66 /28 to 194.45.67.78 /28 to be configured on the 10 computing machines.
Once the hosts are connected, the S3 is configured such that, the ports on which the 10 computing machines and S4 is connected is configured as vLAN 3.
The following demand is of a subnet to host 2 computing machines for the 2 divisional directors. It would be appropriate to utilize a mask of 29 spots ( /29 ) , leting in all 8 host reference to be configured on the subnet.
The fourth subnet would be from: 194.45.67.80 /29 to 194.45.67.87 /29
194.45.67.80 /29 i? Network Address
194.45.67.87 /29 i? Broadcast reference
This leaves 6 useable references which can be used from 194.45.67.81 /29 to 194.45.67.86 /29.
One IP reference from the above scope demands to be allocated to the port linking S4 and S3. This reference becomes the default gateway reference for this subnet on S3.
Let the default gateway reference for the subnet be 194.45.67.81 /29 and references from the scope 194.45.67.82 /29 to 194.45.67.86 /29 to be configured on the 2 computing machines.
Once the hosts are connected, the Switch 3 is configured such that, the ports on which the 2 computing machines and S4 is connected is configured as vLAN 4.
The following demand is of a subnet to host merely 1 computing machine for the CEO. It would be appropriate to utilize a mask of 30 spots ( /30 ) , leting in all 4 host reference to be configured on the subnet.
The fifth subnet would be from: 194.45.67.88 /30 to 194.45.67.91 /30
194.45.67.88 /30 i? Network Address
194.45.67.91 /30 i? Broadcast reference
This leaves 2 valid host references which can be used: 194.45.67.89 /30 or 194.45.67.90 /30.
Off these, one IP reference becomes the default gateway reference for this subnet on S3.
Let the default gateway reference for the subnet be 194.45.67.89 /30 and 194.45.67.90 /30 to be configured on the computing machine.
Once the host is connected, the S3 is configured such that, the ports on which the host and the router is connected is configured as vLAN 5.
vLAN 1 ( S1 ) : Animation and Modeling division
Host Addresss: 194.45.67.2 /27 to 194.45.67.30 /27
Default Gateway: 194.45.67.1 /27
vLAN 2 ( S2 ) : Rendition and Production division
Host Addresss: 194.45.67.34 /27 to 194.45.67.62 /27
Default Gateway: 194.45.67.33 /27
vLAN 3 ( S3 ) : Administration, Gross saless and Marketing division
Host Addresss: 194.45.66.66 /28 to 194.45.67.78 /28
Default Gateway: 194.45.67.65 /28
vLAN 4 ( S3 ) : Divisional Directors
Host Addresss: 194.45.67.82 /29 to 194.45.67.86 /29
Default Gateway: 194.45.67.81 /29
vLAN 5 ( S3 ) : Chief executive officer
Host Address: 194.45.67.90 /30
Default Gateway: 194.45.67.89 /30
Hence there would be IP references from 194.45.67.92 /27 onwards at the company 's disposal ( apart from the fresh IPs available in subnets of each division ) to suit workforce enlargement in the hereafter, where each extra host can be included in the above designed vLANs to go a portion of the several section.
The rating of above mentioned design outputs the undermentioned strengths and drawbacks:
The design involves the division of the work force into vLANs, which enables logical separation between them.
The usage of CAT5 and CAT6 overseas telegrams enables the information transportation rates of the users to travel up to 100Mbps and 1Gbps severally. Besides, the functional lengths of these overseas telegrams ( up to 100 metres ) , meets the cabling demand.
Presently there are 53 connexions required and the company plans to turn by 50 % , which means extra port demand would be around 27 ( about ) . That means the entire port demand would be around 80. The usage of 24 and 48 port switches which would be easy accommodated by the current design.
Along with this, the design uses IP subnets which provided the company with adequate IPs which would their enlargement liberally.
The design uses a L3 switch which is cheaper than a router, therefore turn outing cost effectual. However, if the company budget licenses, so a router can be besides used for cyberspace.
The design separates the logical spheres of the CEO and the directors from their several sections by assigning different vLANs to them. Therefore, the communicating between the hierarchies can be controlled.
The design besides permits the company to get an cyberspace connexion, if required, which could be terminated at the L3 Switch.
In the design, the L2 switches are connected to a centrally located L3 switch in a star topology, which avoids formation of informations cringles, and unwanted conditions like 'Broadcast Storms ' in the web and provides cardinal entree control over the web. ( Hill and Linge, 2010 )
Sing the above mentioned strengths, the design besides has some drawbacks, which needs to be considered.
The design categorizes the company into hierarchies, with the CEO, directors and the sections being logically separated.
However, such a design causes the communicating between the directors and their several sections to travel through an extra hop ( doing a hold ) , which may be unfavourable in some state of affairss.
The web is based on a star topology design which may turn out unwanted as the full web depends on the position of the cardinal router/L3 switch.
If router fails, the full web would fall in. So attention must be taken that a stable router/L3 switch is installed for the web.
The web could besides be designed by utilizing three Layer 3 switches on which the different vLANs could hold been configured and interconnected with each other and there would n't hold been the demand of an extra switch in the web. However, this design could hold formed informations cringles and multiple waies in the web. ( Hill and Linge, 2010 )
Therefore sing the above factors, the designed web is stable and sufficient for the demands specified by the company with the flexibleness provided to spread out work force of the company.
The Data Networking Designs Computer Science Essay. (2020, Jun 02). Retrieved from https://studymoose.com/the-data-networking-designs-computer-science-new-essay
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