Computer Networking
Four routers have to be interconnected in a point-to-point Network. Each pair of root us may connected by a high-speed line, a medium speed line or a low speed line. Find the total number of topologies.

12
729
48
81
ARP.EXE

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Computer Networking
Modulation is the process of

converting analog signals to digital signals
Multiplexing various signals into high speed line signals
converting digital signals to analog signals
performing data encryption.

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