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mustardpruneΔίκτυα και Επικοινωνίες

23 Οκτ 2013 (πριν από 4 χρόνια και 16 μέρες)

59 εμφανίσεις

1957

2010

Typical IBM mainframe


ARPANET


Founded by DARPA, Defence Advanced Research
Project


NPL


Founded by the National Physical Laboratory


RAND


Founded by the RAND corporation, a research
firm.


CYCLADES


French network developed by Louis
Pouzin

to
‘explore alternatives to the ARPANET’


(Wikipedia.org)

DARPA (Defence Advanced Research
Project)


Developed the ARPANET.


‘First operational packet switching network’


(Wikipedia)


Emphasis on security.


IMP computers, (Interface Message Processors)
connected to mainframes.


IMP’s connected together in an ‘IMP
-
Subnet’


NCP Protocol (Network Control Program)


NCP was soon replaced by the TCP due to
reliability. (Transmission Control Protocol)

NPL (National Physical Laboratory)


Largest applied physics organisation in the UK


Network developed with a heavy emphasis on
file transfer


Foundation of Packet Switching.


Due to UK researchers working closely with US
researchers, ideas and research was shared. This
lead to the development of Packet Switching


Leonard
Kleinrock

Donald Davies

RAND


‘Non
-
profit American think
-
tank’
-
Wikipedia


(In other words, a research firm.)



Paul Baran proposed the
Distributed Network

concept.


Paul Baran

Centralized




Distributed

CYCLADES


French packet switching network founded by
Louis
Pouzin
.


Intended to explore the other alternatives of the
ARPANET.


Heavy focus on connections between networks.


Computers were no longer to interfere with the
transfer of data, but simply transfer it.

X.25 Protocol


The x.25 protocol allowed transmission through
the phone companies servers for a set fee per
month.


Foundation of the modern day ISP

Open System Interconnection
Reference Model (OSI)


Attempt to make networks follow regulations
that would assure compatibility


Divides networks in seven
layers; Application,
Presentation, Session, Network,
Data
-
Link (Or ‘transport’) and
Physical layers.


OSI


OSI eventually
standardized the
networks, birthing the
TCP/IP protocol.
Allowing networks to be
merged together.
Creating the internet.