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/** * Returns a String representation of the specified byte array * using the charset from {@link EncryptionBeanBase#getCharset()}. Wraps * any {@link UnsupportedEncodingException} as a result of using an invalid * charset in a {@link RuntimeException}. * * @param bytes * @return * @throws RuntimeException If the charset was invalid, or some other unknown error occurred * @throws IllegalArgumentException If the byte array was not specified */ private String byteArrayToString(final byte[] bytes) throws RuntimeException, IllegalArgumentException { // Precondition check if (bytes == null) { throw new IllegalArgumentException("Byte array is required."); } // Represent as a String String result = null; final String charset = this.getCharset(); try

Remote Assistance can be controlled via the system applet properties or by using Group Policy. However, like the Remote Desktop for Administration utility, once Group Policy is in effect, changes cannot be made using system properties. A very sound security practice is to determine whether these models for administra tion should be used and by whom, and then document the process.

1. What command must you use to install Active Directory using the Active Directory Installation Wizard

Use the Dcpromo command to install Active Directory using the Active Directory Installation Wizard.

3

When a bean is in the Does Not Exist state, it is not an instance in the memory of the system. In other words, it has not been instantiated yet.

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If no gateway is present, the choice is either to create one or to configure IPSec policies. Gateway-to-gateway tunnels are discussed in 7.

2

Stateless bean instances enter the Method-Ready Pool as the container needs them. When the EJB server is first started, it may create a number of stateless bean instances and enter them into the Method-Ready Pool. (The actual behavior of the server depends on the implementation.) When the number of stateless instances servicing client requests is insufficient, more can be created and added to the pool.

2. What items are installed when you use the Active Directory Installation Wizard to install Active Directory

The choice of an IPSec policy has the following advantages:

The Active Directory Installation Wizard installs Active Directory, creates the full domain name, assigns the NetBIOS name for the domain, sets the Active Directory database and log folder location, sets the shared system volume folder location, and installs DNS and a preferred DNS server if you requested DNS installation.

Few ports need to be opened on the firewall. The data is tunneled not just across the border but from an Active Direc tory domain controller to an Active Directory domain controller. IPSec requires mutual authentication between the servers. IPSec configuration can be made more secure by the choice of key size, length of time a key is used, and the choice of authentication, integrity, and encryption algorithms.

An answer file that is used to install Windows Server 2003 can also include the installation of Active Directory. Or, you can create an answer file that installs only Active Directory and is run after Windows Server 2003 Setup is complete and you have logged on to the system.

When an instance transitions from the Does Not Exist state to the Method-Ready Pool, three operations are performed on it. First, the bean instance is instantiated by invoking the Class.newInstance() method on the stateless bean class. Second, the container injects any resources that the bean s metadata has requested via an injection annotation or XML deployment descriptor.

In this practice, you will design the Internet data center network for a fictitious company and restrict the ports used for Active Directory replication. Complete the following exer cises. If you are unable to answer a question, review the lesson materials and try the question again. You can find answers to the questions in the Questions and Answers section at the end of this chapter.

5. Which of the following commands is used to demote a domain controller a. Dcdemote b. Dcinstall c. Dcpromo d. Dcremove

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Tip Remember, the best design is not always the one that appears to provide the most security. Other factors such as risk, performance, and cost can affect the decision.

You must always provide a no-argument constructor. This is a constructor that accepts no parameters. The container instantiates instances of the bean class using Class.newInstance(), which requires a no-arg constructor. If no constructors are defined, the no-arg constructor is implicit.