Con guring the Oracle Network Environment in Software

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Con guring the Oracle Network Environment
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C The test connection will fail, because the connect string doesn t match the service name D There will be a port conflict on serv2, because prod and dev try to use the same port 7 Consider this line from a listenerora file:
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L1=(description=(address=(protocol=tcp)(host=serv1)(port=1521)))
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What will happen if you issue this connect string,
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connect scott/tiger@L1 (Choose the best answer)
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You will be connected to the instance L1 You will only be connected to an instance if dynamic instance registration is working You can t tell it depends on how the client side is configured If you are logged on to the server machine, IPC will connect you to the local instance The connection will fail if the listener is not started
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Use the Oracle Shared Server Architecture
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8 Which of these memory structures is not stored in the SGA for a shared server session (Choose the best answer) A Cursor state B Sort space C Stack space 9 Match the object to the function:
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a Common queue b Dispatcher c Large pool d Listener e Response queue f Shared server
Function
A Connects users to dispatchers B Stores jobs waiting for execution C Executes SQL statements D Stores results waiting to be fetched E Receives statements from user processes F Stores UGAs accessed by all servers
10 Which of the following is true about dispatchers (Choose all correct answers) A Dispatchers don t handle the work of users requests; they only interface between user processes and queues B Dispatchers share a common response queue
Lab Question
C Dispatchers load-balance connections between themselves D Listeners load-balance connections across dispatchers E You can terminate a dispatcher, and established sessions will continue 11 Which of the following statements about shared servers are true (Choose the best answer) A All statements in a multistatement transaction will be executed by the same server B If one statement updates multiple rows, the work may be shared across several servers C The number of shared servers is fixed by the SHARED_SERVERS parameter D Oracle will spawn additional shared servers on demand
LAB QUESTION
Use whatever tool you like (even a text editor) to create two listeners, one listening on address 127001, port 2521, the other listening on address 127002, port 2521 This will simulate a server with two network cards Start both listeners Use the Net Manager to create a tnsnames entry with both addresses, that will load-balance connections across them and, if one fails, try the other This is an option visible when you click the Advanced button after defining the second address, as shown in the illustration that follows
6:
Con guring the Oracle Network Environment
Save the configuration, and test the entry with tnsping If it works, adjust your instance to use your new tnsnames entry as the value for the local_listener parameter Test the configuration by connecting with SQL*Plus through the new tnsnames connect string Prove that there is fault tolerance by shutting down one listener and then the other: you will find that as long as one of them is working, you can still connect
Self Test Answers
SELF TEST ANSWERS
Configure and Manage the Oracle Network
1 A, D, E, and F TCP, SDP, TCPS, and NMP are the supported protocols with the current release B and H are wrong because UDP and NetBIOS/NetBEUI have never been supported, C and G are wrong because SPX and LU62 are no longer supported 2 D The client-server split is between user process and server process A, B, C, and E These all misrepresent the client-server architecture 3 C Many listeners can shared one address, if they use different ports A is wrong because one listener can launch sessions against many instances B is wrong because a listener can connect you to an registered service D is wrong because the local_ listener parameter controls which listener the instance will register with dynamically; it will also accept connections from any listener that has it statically registered 4 C This is the only required client-side file for local naming A is wrong because SQLNETORA is not essential B and D are wrong because they refer to server-side files E is wrong because some configuration is always necessary for local naming (though not for Easy Connect) 5 B The listener establishes connections but is not needed for their maintenance A, C, D, and E These are all incorrect because they assume that the listener is necessary for the continuance of an established session 6 A and B All three are valid but will only work if the services are registered with the listeners C is wrong because there need be no connection between the alias used in a connect string and the service name D is wrong because many services can be accessible through a single listening port 7 C Some client-side configuration is necessary, and without knowing what it is you have no idea what will happen A is wrong because the connect string could connect to any instance B is wrong because, while the listener L1 must use dynamic registration, this is not enough D is wrong because the use of IPC to bypass the listener is not relevant E is wrong because (while certainly true) you don t know if it is relevant
6:
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