为了保障数据的存储和传输安全，需要对一些重要数据进行加密。由于对称密码算法（1），因此特别适合对大量的数据进行加密。国际数据加密算法（IDEA）的密钥长度是（2）位。空白（2）处填（）
A、56
B、64
C、128
D、256
在Windowsxp的窗口菜单命令中，呈灰色形式的命令表明（）。
A、该命令暂时不可用
B、Windows软件有问题
C、该命令一直不可用
D、该命令有差错
Companycom is currently using a p690 and has just ordered a p5 590. They prefer to run in full system partition mode, since their application will utilize all the resources in the machine, and they don't want the overhead of an LPAR. What is the best response to the customer about the POWER5 capabilities?（）
A、POWER5 runs in an SMP mode as default
B、POWER5 can run in a full system mode the same as the p690
C、POWER5 can run in full system mode with the purchase of PLM
D、POWER5 can run in a full system mode， but it is in LPAR mode
SuSe Linux Enterprise Server (SLES) has been installed on an LPAR on a p5 570, but the client is having problems directly after installation with slow network performance. What is the most probable cause?（）
A、SLES does not perform well with DHCP
B、SLES was installed with the default host name of Linux
C、Virtual Network Resources are being used, which is not supported in a SLES environment
D、The SLES instance was installed in 32-bit mode, where 64-bit should have been selected
Companycom has a system running AIX 5.2 and wants to upgrade to AIX 5.3. What method would provide the quickest recovery if the upgrade failed?（）
A、Use alt_disk_install
B、Backup image to NIM server
C、Backup using mksysb to DVD-RAM
D、Apply the upgrade and do not commit
敏感性因素是（）
A、使项目由可行变为不可行时的最大极限值
B、很少能为决策者提供经济投资替代方案发生反转的潜在可能性
C、考虑方案的成本或时间要素概率
D、一般将方案的可能结果分成“乐观”、“非常乐观”与“不乐观”