Understanding Network Overload and Data Delivery Issues

The question describes a situation where a network is receiving a very large amount of data from many connected computers. This excessive data traffic causes the network to struggle or fail in delivering the data successfully. We need to identify the correct term for this inability of the network to deliver data due to being overloaded.

Analyzing the Options

Let's look at the given options and see which one best fits the description of an overloaded network failing to deliver data:

• Access control: This refers to security measures that limit or control who can access network resources or data. It's about permissions, not about the network's capacity to handle traffic. So, this is not the correct term for the described problem of an overloaded network.
• Congestion: In networking, congestion occurs when the amount of data traffic on a network exceeds its capacity to handle that traffic efficiently. This leads to delays, packet loss (data not being delivered), and a general slowdown in network performance. The description in the question perfectly matches this definition.
• Error propagation: This term relates to how errors spread through a system, perhaps from one layer of a network protocol to another, or how a single error can cause further errors. While errors can increase in a congested network, "error propagation" itself doesn't define the state of being overloaded and unable to deliver data.
• Deadlock: Deadlock is a situation where two or more processes or nodes are stuck waiting for each other to release a resource, leading to a standstill. While resource contention (like buffer space in routers) contributes to network congestion, "deadlock" is a term often used in operating systems or distributed systems for resource waiting cycles, not the general state of network overload causing failed data delivery.

Identifying the Correct Term

Based on the analysis, the term that specifically describes a network being overloaded with data and consequently failing to deliver that data is Congestion. Network congestion is a major issue that network designers and administrators try to avoid or mitigate.

Conclusion

When a network is overloaded with enormous data sent by many computers, and this prevents the delivery of data, the situation is known as Congestion.

Revision Table

Additional Information: Dealing with Network Congestion

Network congestion is a common problem that can significantly impact performance. Networks use various mechanisms to manage or prevent congestion:

• Flow Control: Prevents a fast sender from overwhelming a slow receiver. This is typically end-to-end.
• Congestion Control: Aims to regulate the flow of data into the network when congestion is detected or anticipated. This is often a network-wide issue. Protocols like TCP use congestion control mechanisms (e.g., additive increase/multiplicative decrease) to adjust sending rates based on perceived network conditions.
• Quality of Service (QoS): Prioritizing certain types of traffic (like voice or video) over others to ensure they get through even when the network is busy.
• Buffering: Devices like routers use buffers to temporarily store incoming data packets during periods of high traffic. However, if buffers overflow, packets are dropped, contributing to the inability to deliver data.
• Traffic Shaping and Policing: Mechanisms used to manage network bandwidth and control the volume and rate of traffic being sent into the network.

Understanding congestion is crucial in network design and management to ensure reliable data delivery.