Part I Creation of Internet
Dec 10, 2014
Part ICreation of Internet
Cold War
ARPA / DARPAJ.C.R LickliderThe Computer as a
Communication Device
Robert TaylorThree Terminals
Packet switching
network communications method that groups all transmitted data, irrespective of content, type, or structure into suitably-sized blocks, called packets.
The network over which packets are transmitted is a shared network which routes each packet independently from all others and allocates transmission resources as needed.
ARPAnetIMPs
Up to 4 local hosts & six remote IMPs NCP
First networkFirst message
Other packet switched networksCYCLADESNPLSNA
X.25 standard.First international packet switched network (IPSS).
Unifying the network methods
TCP versions TCP/IPFirst: ARPAnet, Packet Radio Network in the
SF Bay area NASA (NSN), NSF (CSnet) , DOE (ESnet).NSF backbone
TCP/IP world wideFirst ARPAnet connection outside US to
Norway then to Great Britain.CERN roleAustraliaAsia ( Japan, Singapore, Thailand).
Opening Internet to commerceCommercial use of the Internet becomes a
debate topic.First ISPs ( PSInet, UUnet, Netcom) :
service to the regional research networks and email and usenet news to the public.
First dial-up ISP was Verio 1986.Educational use / price trade-offWeb
Part IIAddressing
IP AddressLogical address.32 bitsIANA
Classful Addressing
Subnetting Classful Network Motivation for subnetting
explosion in size of IP routing tablesIf more address space was neededAny changes to the internal structure of a
company's network
CIDR
توتة توتة والحدوتة فرغت
؟ ملتوتة ولال حلوة