Autosave: 2024-10-22 16:47:58

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thomasabishop 2024-10-22 16:47:58 +01:00
parent 82b4b4e1d8
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@ -5,7 +5,7 @@ created: Tuesday, October 22, 2024
# 385af4b4-43ea-4a5f-85a3-5791d95109aa # 385af4b4-43ea-4a5f-85a3-5791d95109aa
### _Paul Baran's concept of a distributed network and influence on architecture of the ARPANET_ ### Paul Baran's concept of a distributed network and influence on architecture of the ARPANET
Baran worked for RAND not ARPA and his work predated the commencement of the Baran worked for RAND not ARPA and his work predated the commencement of the
ARPANET. However his model of a distributed network was highly influential on ARPANET. However his model of a distributed network was highly influential on
@ -21,7 +21,7 @@ If we think of the nodes of the phone network as being loci for the transferral
of data, the phone network was highly centralised. The message would go from its of data, the phone network was highly centralised. The message would go from its
transmitter to a central switch which would route it to the intended receiver: transmitter to a central switch which would route it to the intended receiver:
// Diagram ![Centralised network](static/centralised.png)
The problem is obvious: if the central switch went down, all data transferance The problem is obvious: if the central switch went down, all data transferance
stop. stop.
@ -29,7 +29,7 @@ stop.
In fact this is an over-simplification. The phone network at the time was In fact this is an over-simplification. The phone network at the time was
actually decentralised: actually decentralised:
// Diagram ![Decentralised network](static/decentralised.png)
This system is an improvement because each region has a switch and not all nodes This system is an improvement because each region has a switch and not all nodes
are dependent on the central switch at all times. If the central switch goes are dependent on the central switch at all times. If the central switch goes
@ -43,7 +43,7 @@ Baran conceived a _distributed_ network as his model for the most resiliant
communications network. Instead of centralised or decentralised switches, nodes communications network. Instead of centralised or decentralised switches, nodes
would connect to eachother in aggregate: would connect to eachother in aggregate:
// Diagram ![Distributed network](static/distributed.png)
Under this system, every node can eventually access every other node through Under this system, every node can eventually access every other node through
intermediary nodes, without going through a main switch that establishes the intermediary nodes, without going through a main switch that establishes the

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@ -11,9 +11,9 @@ is a [Zettelkasten](https://en.wikipedia.org/wiki/Zettelkasten) work in progress
comprising notes from my self-directed study of software engineering and comprising notes from my self-directed study of software engineering and
computer science. computer science.
**Build ID:** 8e6dee36-9f5f-47c8-b9f6-5160559ef056 **Build ID:** 3962ef80-32e3-49b8-8e16-d14a26e9787a
**Published:** Tue 22 Oct 2024 16:25:47 **Published:** Tue 22 Oct 2024 16:47:58
### Recent edits ### Recent edits

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@ -5,7 +5,7 @@ created: Tuesday, October 22, 2024
# 385af4b4-43ea-4a5f-85a3-5791d95109aa # 385af4b4-43ea-4a5f-85a3-5791d95109aa
### _Paul Baran's concept of a distributed network and influence on architecture of the ARPANET_ ### Paul Baran's concept of a distributed network and influence on architecture of the ARPANET
Baran worked for RAND not ARPA and his work predated the commencement of the Baran worked for RAND not ARPA and his work predated the commencement of the
ARPANET. However his model of a distributed network was highly influential on ARPANET. However his model of a distributed network was highly influential on
@ -21,7 +21,7 @@ If we think of the nodes of the phone network as being loci for the transferral
of data, the phone network was highly centralised. The message would go from its of data, the phone network was highly centralised. The message would go from its
transmitter to a central switch which would route it to the intended receiver: transmitter to a central switch which would route it to the intended receiver:
// Diagram ![Centralised network](../img/centralised.png)
The problem is obvious: if the central switch went down, all data transferance The problem is obvious: if the central switch went down, all data transferance
stop. stop.
@ -29,7 +29,7 @@ stop.
In fact this is an over-simplification. The phone network at the time was In fact this is an over-simplification. The phone network at the time was
actually decentralised: actually decentralised:
// Diagram ![Decentralised network](../img/decentralised.png)
This system is an improvement because each region has a switch and not all nodes This system is an improvement because each region has a switch and not all nodes
are dependent on the central switch at all times. If the central switch goes are dependent on the central switch at all times. If the central switch goes
@ -43,7 +43,7 @@ Baran conceived a _distributed_ network as his model for the most resiliant
communications network. Instead of centralised or decentralised switches, nodes communications network. Instead of centralised or decentralised switches, nodes
would connect to eachother in aggregate: would connect to eachother in aggregate:
// Diagram ![Distributed network](../img/distributed.png)
Under this system, every node can eventually access every other node through Under this system, every node can eventually access every other node through
intermediary nodes, without going through a main switch that establishes the intermediary nodes, without going through a main switch that establishes the