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【单选题】
Companycom is installing a p5 590 with a HMC to manage LPARs. The customer is very concerned about security and wants to restrict network traffic that is not necessary. What is necessary for communication between the LPARs and the HMC?（）A.
An administrative VLAN with port 1808
B.
Port 657 which must remain open to TCP/IP and UDP traffic
C.
Network addresses are provided by DHCP services on the network
D.
DHCP on the HMC is required to be on to communicate between LPAR and HMC
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【简答题】Relational opposites
【单选题】设λ 0 是矩阵 A 的特征方程的 3 重根, A 的属于λ 0 的线性无关的特征向量的个数为 k ,则必有( )
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【多选题】设矩阵A为n阶实矩阵，n为奇数，则下列叙述正确的是________
A.
矩阵 A 一定有实特征值
B.
矩阵 A 可能有复特征值
C.
矩阵 A 有 n 个线性无关的特征向量
D.
矩阵 A 线性无关的特征向量个数可能少于n