Chapter 1, Problem 7RQ

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Client-server model is the networking model that cannot be supported or used without upgrading it.

Hence, the correct answer is option “B”.

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Explanation of Solution

Client-server:

• Client-server model is a distributed application structure that includes the processes between the client and the server.
• The client transmits a request to server via a wireless network.
• The server processes the request of the client and returns the result via a wireless network.

Explanation for incorrect options:

Hybrid:

• A hybrid topology is a combination of two or more topologies to form a new topology.
• In hybrid topology, the different topologies are connected by the controller of the network.

Hence, option “A” is wrong...