题目内容

SMTP的默认端口为 (47) ,其作用是 (48) 。
(47)

A. 21
B. 23
C. 25
D. 80

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(2)

A. =COUNT(E3:E10,>=60)和=COUNT(E3:E10,<60)
B. =COUNT(E3:E10,">=60")和=COUNT(E3:E10,"<60")
C. =COUNTIF(E3:E10,>=60)和=COUNTIF(E3:E10,<60)
D. =COUNTIF(E3:E10,">=60")和=COUNTIF(E3:E10,"<60")

(18)

A. F9
B. F0
C. 89
D. 80

(33)

A. Dhcpdiscover
B. Dhcpoffer
C. Dhcprequest
Dhcpack

IPv6 地址FF05::B3 的完整形式是______。

A. FF05:0000:B300
B. FF05:0:0:0:0:0:0:B300
C. FF05:0000:00B3
D. FF05:0:0:0:0:0:0:00B3 TFTP ICMP TCP TP TELNET TCP IP Ethernet SMTP UDP IP ICMP FTP TCP ARP IP

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