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單項(xiàng)選擇題

Which of the following protocols requests membership to a multicast group?（）

A.IGMP
B.SNMP
C.SMTP
D.ICMP

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單項(xiàng)選擇題

A user receives an email slating that their account was compromised and there is a need to verify
account credentials by submitting the correct information on a website.
Which of the following security threats is occurring?（）

A. Phishing
B. Smurf attack
C. Denial of service
D. Man-in-the-middle

單項(xiàng)選擇題

Which of the following protocols should be used to monitor network performance?（）

A.SNTP
B.SMTP
C.HTTP
D.SNMP

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