nThe first Internet was ARPANET in 1969’s with
 four nodes
 nPresent TCP/IP version
 4 has problems especially in 
 nlacking of address capacity
 nsecurity
 nIn 1997 ipV6 was initiated - However
 not too much used yet due to compatibility problems
 nTCP/IP does not have any general advance
 (except that it is so widespread)
 when compared to IPX, AppleTalk, DECnet etc.
 nEssential high level network functions 
 nrouting management 
 nname servers 
 nnetwork management protocols
 nNetwork consists of 
 nhardware as workstations, networks, routers, bridges
 nsoftware as applications and protocols
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