Which of the following customer requirements is the TS7650G Gateway designed to address?()
A、latency across a long distance network
B、high-speed backup of large video files
C、improve the throughput of tape backups
D、reduce cost and increase storage capacity utilization
Which of the following is the standard aspect ratio for HDTV?()
A、2.35:1
B、4:3
C、1.33:1
D、1.78:1
某公司采用100M宽带接入Internet,公司内部有15台PC机,要求都能够上网。另外有2台服务器对外分别提供Web和E-mail服务,采用防火墙接入公网,拓扑结构如下图所示。如果防火墙采用NAPT技术,则该单位至少需要申请()个可用的公网地址。
A、1
B、2
C、3
D、4
CPU中,除了内部总线和必要的寄存器外,主要的两大部件分别是运算器和( )。
A、控制器
B、存储器
C、Cache
D、编辑器
Which of the following printers would be the BEST choice for printing on multi-part forms?()
A、Impact printer
B、Thermal printer
C、Inkjet printer
D、Laser printer
Which two statements are true regarding B-tree indexs()
AThe leaf blocks in the index are doubly linked.
BThe leaf node stores a bitmap for each key value.
CThe rows with NULL value in key columns also have entries in the index.
DThe deletion of a row from the table causes a logical deletion in index leaf block and the space becomesavailable for the new leaf entry