Meaning: This quote by Jon Postel, a prominent computer scientist and one of the early architects of the internet, succinctly captures the fundamental concepts of addressing and routing in the context of computer networks. Let's break down the quote and explore each component in more detail.

First, Postel mentions "A name indicates what we seek." In the context of the internet and computer networks, this refers to the concept of naming resources. A name, in this context, could be a domain name, a uniform resource locator (URL), or any other identifier that allows us to refer to a specific resource. Domain names, for example, provide a human-readable way to identify and access resources on the internet. When we type a domain name into a web browser, it indicates what we are seeking, such as a website, a file, or a service.

Next, Postel discusses how "An address indicates where it is." In the realm of computer networks, addressing is crucial for identifying the location of resources. This can include IP addresses, which are used to uniquely identify devices on a network, or physical addresses in the case of networking hardware. IP addresses, in particular, play a critical role in directing data packets to their intended destinations across the internet. They serve as the "where" of network communication, allowing data to be routed to the correct destination based on its address.

Finally, Postel states that "A route indicates how we get there." Routing is the process of determining the path that data packets should take from the source to the destination across a network. In the context of the internet, this involves complex algorithms and protocols that guide data through a series of interconnected networks and devices. Routers, which are key components of network infrastructure, use routing tables and protocols to make decisions about the most efficient paths for data to travel. By determining the best route for data packets, networks can ensure timely and reliable delivery of information.

In essence, Postel's quote encapsulates the essential components of network communication: naming, addressing, and routing. These concepts are foundational to the functioning of the internet and other computer networks, enabling users to access resources, identify their locations, and facilitate the efficient transfer of data.

Jon Postel's contributions to the development of the internet, including his work on the Internet Protocol (IP) and the Domain Name System (DNS), have had a lasting impact on the way we communicate and interact in the digital age. His insights into the fundamental principles of network communication continue to be relevant as we navigate the complexities of modern information technology.

In summary, Jon Postel's quote eloquently captures the core elements of network communication, shedding light on the importance of naming, addressing, and routing in enabling the seamless exchange of data across computer networks. These concepts form the backbone of the internet and are essential for understanding the underlying mechanisms that drive our interconnected world.