Computer Networking
When a group of computers is connected together in a small area without the help of telephone lines, it is called

Remote communication network (RCN)
Local area network(LAN)
Value added network (VAN)
Wide area network (WAN)
None of these

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Computer Networking
The main difference between synchronous and asynchronous transmission is

the clocking is mixed with the data in asynchronous transmission
the clocking is derived from the data in synchronous transmission
the bandwidth required is different
the pulse height is different.
None of these

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