Explanation:
Oracle Shared Server required Oracle Net Service even if the client and shared server processes reside on the same machine. To use shared servers, a user process must connect through Oracle Net Services or SQL*Net version 2, even if the process runs on the same machine as the Oracle instance. Incorrect Answer:
1: A dispatcher can support multiple client connects concurrently, but a shared server process can be dedicated to not only one dispatcher, but many.
2: Under the Oracle Shared Server architecture, client-user processes connect to dispatcher processes.
3: Dispatcher does not have its own request queue.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 100-102
Chapter 5: Usage and Configuration of the Oracle Shared Server

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