Q.Infotainment Ltd. is an event management company with its prime office located in Bengaluru. The company is planning to open its new division at three different locations in Chennai named as - Vajra, Trishula and Sudershana. You, as a networking expert need to suggest solutions to the questions in part

Establishing a robust and efficient communication network for an organization like Helping Hands, with its head office and multiple branches spread across significant geographical distances, requires careful consideration of several networking fundamentals. The goal is to ensure seamless data exchange, reliability, and optimal performance.

Understanding Network Connectivity

A network allows different computer systems to communicate and share resources. When designing a network, especially one spanning vast distances, we must consider how the different locations will be physically connected (topology), where central resources like servers will reside, the overall geographical scope of the network, and the most effective medium for data transmission.

(i) Best Cable Layout for Effective Network Connectivity

The "cable layout" refers to the network topology, which describes the physical or logical arrangement of nodes (computers, offices) in a network. For connecting geographically dispersed offices, the choice of topology impacts reliability, manageability, and cost.

• Star Topology: In a star topology, each branch office is connected directly to a central hub, which in this case would be the Mumbai Head Office. Data from any branch office must pass through the central hub to reach another branch or the head office.
• Bus Topology: All nodes are connected to a single main cable. This is generally not suitable for wide-area connections due to the difficulty of managing a single long cable across vast distances and its vulnerability to a single point of failure along the bus.
• Ring Topology: Nodes are connected in a closed loop, with data passing from one node to the next. While it can offer redundancy with dual rings, it is complex to implement and manage over long distances and for adding/removing nodes.
• Mesh Topology: Every node is connected to every other node. This offers high redundancy and fault tolerance but is extremely expensive and complex to implement for many nodes, especially over long distances, due to the sheer number of connections required.

For Helping Hands, with its Head Office in Mumbai and branches in Delhi, Kolkata, and Chennai, a Star topology is the most suitable choice for connecting the different locations.

• Description of Layout: Imagine Mumbai H.O. at the geographical center of this network. Direct communication links (cables) would extend from Mumbai H.O. to Delhi, from Mumbai H.O. to Kolkata, and from Mumbai H.O. to Chennai. This means each branch office communicates directly with the Head Office. If Delhi needs to communicate with Kolkata, the data would typically route through Mumbai H.O.
• Advantages of Star Topology for this scenario:
  • Centralized Management: All inter-branch communication can be monitored and managed from the Head Office.
  • Easier Troubleshooting: If a link to one branch fails, it does not affect the connectivity of other branches to the Head Office.
  • Scalability: Adding a new branch simply involves connecting it to the central Head Office, without disrupting existing connections.
  • Security: Centralized control allows for better security implementation at the hub.

(ii) Most Suitable Location to Install the Main Server

The main server is a critical resource that stores and processes data for the entire organization. Its placement significantly impacts performance, accessibility, and security.

When deciding on the server's location, we consider:

• Number of Users: Placing the server closer to the largest group of users minimizes latency and improves response times.
• Infrastructure: The location should have reliable power, cooling, and physical security.
• Management and Maintenance: Ease of access for IT staff to perform maintenance, upgrades, and troubleshooting.
• Bandwidth: The location should have sufficient network bandwidth to handle traffic from all connected offices.

Given the data:

• Mumbai H.O.: 2500 computers
• Kolkata branch: 1300 computers
• Delhi branch: 1200 computers
• Chennai branch: 1100 computers

Mumbai H.O. has the largest number of computers (2500), indicating it is the primary operational hub and likely has the highest data traffic and user base. Placing the main server at the Head Office offers several advantages:

• Optimal Performance for Most Users: The largest user base in Mumbai will experience the lowest latency when accessing the server.
• Centralized Control and Security: As the Head Office, Mumbai likely has the best infrastructure, security measures, and dedicated IT personnel for server management and maintenance.
• Reduced Latency for Inter-Branch Communication: If the star topology is used, all inter-branch data passes through Mumbai H.O. anyway. Having the server there means data doesn't have to travel an extra hop to a different server location.

(iii) Type of Network Formed

Network types are classified based on their geographical spread.

• LAN (Local Area Network): Connects devices within a small, confined area like a single building, office, or home.
• MAN (Metropolitan Area Network): Spans a larger area than a LAN, typically covering a city or a large campus.
• WAN (Wide Area Network): Connects networks over vast geographical distances, such as across cities, states, or even countries. It often uses public telecommunication infrastructure. …

The given data

(i) Server location — Admin Block

Two standard criteria, and both point the same way:

1. 80/20 (maximum-traffic) rule: place the server where the most computers are, so most traffic stays local. Admin Block has 150 of the 290 computers — by far the most.
2. Cable economy: connecting the server block to the other three blocks directly costs, per candidate location:

Admin Block combines a near-minimal cable total with the maximum computer count, so it is the most suitable server location.

(ii) Device inside each building — Switch

• Switch — connects the computers within one building into a LAN and forwards frames only to the intended port. This is the correct choice.
• Modem — converts digital signals for a telephone/broadband line; it is for internet access, not for wiring a LAN.
• Gateway — joins two networks that use different protocols; unnecessary inside one building.
• Router — routes traffic between different networks; not needed to connect computers within a single building.

(iii) Best cable layout — star from the server block

Management ──60 m── ADMIN (SERVER) ──40 m── Medicine
                        │ …