Meaning: This quote by Jon Postel, a prominent computer scientist and one of the key figures in the development of the Internet, provides insights into the functioning of routers in computer networks. Postel's quote sheds light on how routers manage the allocation of bandwidth and prioritize data transmission within a network. Let's break down the quote to understand its significance and implications in the context of computer networking.

Firstly, Postel mentions that "the routers get involved in this," indicating that routers play a crucial role in managing the flow of data within a network. Routers are devices that form the backbone of computer networks, directing data packets from the source to the destination based on the most efficient paths available. In this context, "this" refers to the allocation and prioritization of bandwidth, highlighting the active involvement of routers in this process.

Postel goes on to explain that routers are aware of the allocation of bandwidth along the path between two routers. This points to the dynamic nature of network traffic management, where routers continuously monitor and adapt to the varying bandwidth requirements of different data streams. By being cognizant of the bandwidth allocation, routers can make informed decisions about how to route and prioritize data packets to ensure efficient and reliable transmission.

The quote further delves into the concept of bandwidth reservation and prioritization within a network. Postel mentions that a certain percentage of the bandwidth is reserved for specific purposes. This reserved bandwidth may be allocated for critical network functions, such as voice or video communication, where consistent and reliable transmission is essential. By setting aside a portion of the bandwidth for these purposes, routers can ensure that these applications receive the necessary resources to operate smoothly.

Additionally, Postel notes that a certain percentage of the bandwidth is allowed on a first-come, first-served basis. This reflects the principle of fair access to network resources, where data packets are transmitted based on their arrival time. In a first-come, first-served approach, routers prioritize data packets in the order they are received, ensuring that all data streams have the opportunity to utilize the available bandwidth.

In the context of computer networking, the concepts highlighted in Postel's quote are fundamental to the efficient and equitable distribution of network resources. Bandwidth reservation and prioritization mechanisms are essential for ensuring that critical applications receive the necessary resources while also providing fair access to non-time-sensitive data streams.

Overall, Jon Postel's quote provides valuable insights into the intricate workings of routers in managing bandwidth allocation and prioritization within computer networks. It underscores the dynamic and adaptive nature of network traffic management, where routers play a pivotal role in ensuring efficient and equitable utilization of network resources. Postel's contributions to the development of the Internet and his understanding of network protocols continue to have a lasting impact on the field of computer networking.