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[单选题]

当前表中有4个数值型字段：高等数学、英语、计算机网络和总分。其中，高等数学、英语、计算机网络的成绩均已录入，总分字段为空。要将所有学生的总分自动计算出来并填入总分字段中，使用命令______。

A.REPL 总分 WITH 高等数学＋英语＋计算机网络 FOR*

B.REPL 总分 WITH 高等数学＋英语＋计算机网络

C.REPL 总分 WITH 高等数学＋英语＋计算机网络 ALL

D.REPL 总分 WITH 高等数学＋英语＋计算机网络 FOR ALL

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更多“当前表中有4个数值型字段：高等数学、英语、计算机网络和总分。其中，高等数学、英语、计算机网络的成绩”相关的问题

第1题

Which of the following devices would allow a technician to utilize a single mouse, keyboard, and display to control numerous desktop PCs？（）

A. Port replicator

B. Docking station

C. USB hub

D. KVM switch

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第2题

Using network monitoring tools would allow an administrator to do which of the following？（）

A. Configure offline devices

B. Examine performance issues

C. Install additional software and updates

D. View syslog events

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第3题

Considering the following sentences, which one would the author most agree？A．Digital techn

Considering the following sentences, which one would the author most agree？

A．Digital technology is useless.

B．Digital divide will help poor countries becoming rich.

C．Poor people need more immediate concerns, such as food, health care and security.

D．Mobile phones should be promoted firstly.

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第4题

Which of the following devices will allow a technician to measure the amount of data that is capable of traversing the network？（）

A. Event logs

B. Throughput tester

C. Packet sniffers

D. OTDR

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第5题

Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices？（）

A. enable cdp

B. cdp enable

C. cdp run

D. run cdp

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第6题

Which of the following devices would MOST likely integrate a DHCP server？（）

A．Router

B．Hub

C．Switch

D．Bridge

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第7题

Which of the following security devices would MOST likely be used on a network to screen and prevent malicious traffic？（）

A．IDS

B．VPN

C．NIPS

D．HIDS

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第8题

Which of the following devices would need to be configured to block specific ports and protocols from entering the network？（）

A. Bridge

B. Firewall

C. Port replicator

D. Gateway

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第9题

Which of the following wiring standards would MOST likely be used to interconnect two devices without the use of a hub or switch？（）

A．568A

B．568B

C．Crossover

D．Loopback

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第10题

Which of the following would be the MINIMUM cable type that would allow a transmission speed of1GB between two locations 250 meters （820 feet) apart？（）

A. Multi-mode fiber

B. CAT6

C. CAT5e

D. Single-mode fiber

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