1. Read/write - used to specify whether CPU wants to red or write to RAM (or I/O)
2. Memory / I/O - used to specify whether address refers to RAM or some I/O device
3. Clock signal - to co-ordinate transmission
4. ACK - used to acknowledge that data was received (or otherwise)
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[object Object]
Different cities have different symbols so it is not possible to answer the question.
Ring, Star, Bus, Mesh.
bus topology
Bus topology
Bus Topology