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This project includes three phases. You need to complete Phase I before moving on to Phase II. Likewise, you need to complete Phase II before moving on to Phase III or the final phase in the project. Hi-tech Net Corp. is operating in three locations in the United States. Their main office is located in New York, NY. They have two branch offices located in Chicago, IL and Sacramento, CA. You have just been hired as Hi-tech Net Corp.’s consulting engineer to implement their network infrastructure. Both branch offices will be directly connected to the main office in NY via a leased line circuit (point-to-point serial connection).

New York’s Office IP Information

The main office has four LAN segments: Executive, Engineering, Services, and Native&Management. Each LAN segment is identified by a VLAN number as seen below.

• Executive: VLAN 15
• Engineering: VLAN 25
• Services: VLAN 35
• Native&Management: VLAN 99

The organization is using the following network address in NY: 10.150.0.0/16.

• Executive: 60 computers including future growth
• Engineering: 80 computers including future growth
• Services: 115 computers including future growth
• Native&Management: 12 computers including future growth

Illinois’ Office IP Information

The IL branch has three LAN subnets with 45 IP addresses each. They use the network address 10.150.100.0 /24 to obtain the required subnets.

California’s Office IP Information

The CA branch has three LAN subnets with 25 IP addresses each. They use the network address 10.150.200.0 /25 to obtain the required subnets.

Tasks to Do

Task 1

Subnet the 10.150.0.0/16 network for NY and assign the first subnets to Services followed by Engineering. Re-subnet only the first unused subnet to allocate IPs for Executive and Native&Management. Assign subnets to these VLANs accordingly.

Task 2

Subnet the 10.150.100.0 /25 network for IL and assign the last IP to Loopback 1, Loopback 2, and Loopback 3 interfaces of the router, respectively.

Task 3

Subnet the 10.150.200.0 /25 network for CA and assign the last IP of each subnet to Loopback 1, Loopback 2, and Loopback 3 interfaces of the router.

Task 4

Use the network address 10.1.255.0/25 to find WAN subnets between NY and IL and NY and CA, respectively. Assign the first WAN subnet for NY to IL and the second for NY to CA, with only two IP addresses per subnet.

Task 5

Design the current network topology using Microsoft Visio, including Loopback interfaces, point-to-point connections, and WAN IPs. Replace “IP Address” placeholders with actual IPs for each interface.

Sample Paper For Above instruction

The architecture and subnetting plans for Hi-tech Net Corp. are critical for establishing a flexible and scalable network infrastructure across its three U.S. locations. The careful division of IP address space ensures efficient utilization of available addresses, simplifies network management, and prepares the organization for future growth, especially considering the specific VLAN assignments and IP requirements specified in the project.

Beginning with the New York office, the organization employs the 10.150.0.0/16 network. To subnet this large network suitably, especially for the VLANs assigned to different departments such as Executive, Engineering, Services, and Native&Management, a precise subnetting approach is necessary. The subnets must accommodate current and future host requirements without excessive IP waste. Implementing Variable Length Subnet Masking (VLSM) allows the organization to assign subnet sizes effectively aligning with each VLAN’s host count, including future growth considerations.

For the Services VLAN with 115 hosts, a /25 subnet provides 126 usable addresses (2⁷-2), suitable for this VLAN without significant IP wastage. Similarly, the Engineering VLAN with 80 hosts requires a /25 subnet, which supplies 126 usable addresses, offering ample space for future growth. The Executive VLAN, with 60 hosts, can be efficiently assigned a /26 subnet, providing 62 usable IP addresses, again including room for expansion. The Native&Management VLAN, with fewer hosts, only needs a /28 subnet, offering 14 usable addresses, properly aligned with the current needs and future considerations.

The process of subnetting also involves re-assigning leftover address space for the Executive and Native&Management subnets, optimizing IP address space utilization. The re-subnetting process necessitates only the first unused subnet to efficiently utilize the existing address space, preventing unnecessary wastage. This approach ensures each VLAN's subnet is correctly sized for current needs and anticipated future growth, thereby bolstering the scalability of the overall network infrastructure.

Turning to the IL office, the subnetting uses the 10.150.100.0 /24 network. Each subnet with 45 IP addresses corresponds to a /26 prefix (since 2⁶ = 64 addresses), ensuring adequate room for current hosts and future expansion. Assigning the last IP address in each subnet to loopback interfaces improves network management and testing capacity without requiring additional subnets or rewiring. These loopback interfaces serve as virtual interfaces for network troubleshooting, routing protocols, and management traffic, contributing to network reliability and ease of maintenance.

The CA office’s network, 10.150.200.0 /25, with three subnets of 25 IP addresses each, corresponds to a /27 prefix, which supplies 30 usable addresses for each subnet. These subnets accommodate current host counts while leaving room for future needs. Similar to the IL office, the last IP addresses are assigned to virtual loopback interfaces, streamlining configuration and testing processes without physical rewiring. This virtual segmentation enhances the flexibility of network topology design while maintaining simplicity and clarity in IP allocation.

The WAN links between NY and IL and NY and CA are critical links in the entire architecture. The 10.1.255.0/25 network provides two IP addresses per subnet, which are assigned respectively to WAN interfaces. These small subnets ensure point-to-point connectivity through the use of only two IPs, reducing unnecessary IP address consumption and simplifying routing configurations.

The design process requires creating an accurate network topology diagram that depicts the virtual LANs, WAN links, loopback interfaces, and associated IP addresses. Visio is traditionally used for this purpose due to its clarity and diagramming capabilities. A clear visualization allows network administrators and stakeholders to understand the physical and logical structure of the network, assess scalability, and troubleshoot effectively during deployment and future expansion.

In summary, the detailed subnetting effort provides a solid foundation for the scalable, manageable, and resilient network infrastructure for Hi-tech Net. Proper IP planning aligned with VLAN assignments, loopback configurations, and WAN connectivity ensures the network meets current demands and is adaptable for future growth, ultimately supporting business operations across all offices with efficiency and reliability.

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