Long ago, two neighboring kingdoms each built a different way for their people to send messages.
The Hall of the Switchboard
In the first kingdom stood a great hall filled with village operators. Whenever a blacksmith wished to speak with a shepherd in another village, he walked to the hall and asked an operator for help.
The operator stretched a leather cord from the blacksmith's peg to the shepherd's peg, creating a private path between them. No one else could use that cord until their conversation was finished.

The chief operator often said, "A road reserved for two travelers keeps their words clear."

The system worked well for a few conversations. But during festivals, long lines formed outside the hall. Every operator became busy, and many villagers had to wait until a cord was free.

Lesson: A traditional telephone switchboard creates a dedicated connection between two callers. The path stays reserved for the entire conversation, even during moments of silence.

The Hall of the Swift Tokens
The second kingdom built no cords at all. Instead, every message was written on a small clay token bearing the sender's mark and the recipient's mark.
Messengers gathered the tokens and carried them from crossroads to crossroads. At each crossroads, the roadkeeper looked only at the destination mark and sent the token along the best available road.

Two tokens from the same sender might even travel different routes if one road was crowded. Yet they still reached the same destination.

The roadkeeper declared, "Each token finds its own way, and the roads remain busy with many travelers."

The kingdom found that thousands of messages could move at once because no single road belonged to only one pair of people.

Lesson: A switched network (such as most modern computer networks) forwards each packet independently. Network switches examine the destination and send data along available paths without reserving a dedicated route.

The King's Observation
The king visited both kingdoms and asked his wisest counselor which system was better.
The counselor replied,

"When two people need an uninterrupted road, the cords serve them well. But when an entire kingdom must share its roads wisely, the clay tokens allow everyone to travel together."

Moral of the Parable
Both kingdoms connected their people, but in different ways:
Traditional telephone switchboard — Like reserving one private road between two villages until the conversation ends.
Switched computer network — Like sending many small message tokens that each find the best route through the kingdom.
The wise builder knows that the best network is not the one with the most roads, but the one that uses its roads most effectively.