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N10-004單項(xiàng)選擇題每日一練(2019.01.18)

單項(xiàng)選擇題
Which of the following WAN technologies has the GREATEST latency and is not recommended for VoIP?（）
A. ISDN
B. DSL
C. Satellite
D. Cable
單項(xiàng)選擇題
Which of the following is an invalid subnet mask?（）
A.255.0.0.0
B.255.256.255.0
C.255.255.255.255
D.255.255.00
單項(xiàng)選擇題
Which of the following network cable types requires grounding?（）
A.STP
B.UTP
C.Fiber
D.Serial
單項(xiàng)選擇題
Which of the following regulates the amount of network traffic a single node receives in a servercluster?（）
A. Load balancer
B. Proxy server
C. Content filter
D. Quality of service
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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