LAN network design and infrastructure of Computer Centre

 

i) Networking devices  

The main network will be using the same Cisco Three Layer Hierarchical Model as explained before.

The networking devices used for the Computer Center will consist of:

 

1 Router

2 Highspeed Core Layer Switches 

3 Distribution Layer Switches

3 Access Layer Switches

2 Access Points


ii) Topology


This is the Logical Lan network design for Computer Center. The other 4 routers will connect to the Computer Center Router, which will in turn connect to the ISP and gaining internet access.

This is the extended LAN network design. As shown in the diagram, the 2nd Floor will be dedicated to managing the servers which will handle the email, SMP, SMSM, SMKB and ULearn services. There are also wireless access services on the ground and 1st floors. 


iii) Communication media

For the network design based on the Cisco Three Layer Hierarchical Model, the recommended communication media would be a combination of wired and wireless media, depending on the specific requirements of different devices and locations within the network. Here's a detailed explanation of the communication media that would be best suited for this design:

  1. Wired Communication Media:

    • Fiber Optic Cabling: Fiber optic cabling is ideal for high-speed and long-distance connections between the core, distribution, and access layer switches. It provides excellent bandwidth, low latency, and resistance to electromagnetic interference. Fiber optic cables are suitable for interconnecting the core and distribution layer switches, as well as connecting the distribution and access layer switches.

    • Ethernet Copper Cabling (e.g., Cat6a or Cat7): Ethernet copper cabling is commonly used for connecting devices within the access layer. It provides reliable and high-speed connections for desktop computers and servers. Cat6a or Cat7 cables are recommended to support Gigabit Ethernet and potentially higher data rates in the future.

  2. Wireless Communication Media:

    • Wi-Fi (IEEE 802.11 standard): For the wireless access points on the ground and 1st floors, Wi-Fi technology based on the IEEE 802.11 standard is suitable. It allows laptops and smartphones to connect wirelessly to the network. The specific version of Wi-Fi (e.g., 802.11ac, 802.11ax) should be chosen based on the required coverage, capacity, and compatibility with client devices.

Now let's examine the communication media for each specific part of the network design:

  • Core Layer: The core layer switches are connected using high-speed fiber optic cabling to ensure fast and reliable communication between the switches.

  • Distribution Layer: The distribution layer switches can be interconnected with fiber optic cabling to handle the traffic between the core and access layers effectively.

  • Access Layer: For the access layer switches, Ethernet copper cabling (such as Cat6a or Cat7) is recommended for the desktop computers and servers. This provides reliable and high-speed connectivity for these devices.

  • Wireless Access Points: The wireless access points on the ground and 1st floors should utilize Wi-Fi technology to provide wireless connectivity for laptops and smartphones. The specific wireless standard and frequency bands (e.g., 2.4 GHz, 5 GHz) should be chosen based on the expected number of devices and coverage requirements.

By combining fiber optic cabling for high-speed wired connections and Wi-Fi technology for wireless access, this network design can provide reliable and efficient communication across the three layers (core, distribution, access) as well as accommodate the wireless connectivity needs of laptops and smartphones in the designated areas.

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