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CCN/Ex02/Exercise 2.md
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@@ -308,3 +308,26 @@ In summary, the main problem with a hub sending all network data to all connecte
## 12
The problem of unnecessary network traffic caused by a hub sending all network data to all connected network hosts can be addressed by using a switch instead of a hub. Switches are designed to selectively forward network data only to the connected hosts that need to receive it, based on the destination MAC (Media Access Control) address in the data packet.
Some ways switches solve this problem include:
1. Reduced Network Congestion:
Since a switch only forwards data to the host that needs to receive it, it reduces unnecessary network traffic and improves network performance. This reduces network congestion and can result in better overall network efficiency.
2. Lower Error Rates:
Switches use a store-and-forward mechanism to process packets, which can help reduce the likelihood of packet collisions and result in lower error rates.
3. Increased Security:
Switches can be configured with features such as port security, VLANs, and access control lists (ACLs) to improve network security and prevent unauthorized access to network resources.
4. Improved Quality of Service (QoS):
Switches can prioritize network traffic based on the type of application or service being used, allowing for more efficient use of network bandwidth and improving overall network performance.
5. Better Use of Available Bandwidth:
By selectively forwarding network data only to the connected hosts that need to receive it, switches make more efficient use of available network bandwidth.
6. Scalability:
Switches can support a larger number of connected devices than hubs, making them more scalable for larger networks.
In summary, using a switch instead of a hub can solve the problem of unnecessary network traffic caused by a hub sending all network data to all connected network hosts, by selectively forwarding data only to the connected hosts that need to receive it, improving network performance, security, QoS, bandwidth utilization, and scalability.