Given that the enterprise has eight sites connected with each other in full-mesh topology which means that each two pair sites have one-to-one secure communication. For example, the site 1 and site 2 have securely communicated with each other, and also site 2 and site 3 have securely communicated with each other, and so on.   If CEO tell you that the network operation fees is costing us a lot of money, and that we want to change the topology of the network from full mesh to hub-spoke to save some costs of leased lines.in such case how many keys are required if we use a public key algorithm?

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Network transmission cabling

A network is a collection of devices connected by communication links. A device can be a computer or any instrument capable of sending and receiving data or information formed by other nodes toward the network. A channel that connects people or things is known as a network. It sends the data from one place to another. It is the basic concept of a computer, network, and data communications.