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kafka主要组成部分是source、sink和channel
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关于无缓冲和有冲突的channel,下面说法正确的是()
A. 无缓冲的channel是默认的缓冲为1的channelB. 无缓冲的channel和有缓冲的channel都是同步的C. 无缓冲的channel和有缓冲的channel都是非同步的D. 无缓冲的channel是同步的，而有缓冲的channel是非同步的
考题
In information theory, "information" is regarded as knowledge which reduces or removes(71) about the occurrence of a specific event from a given set of possible events. The concept "event" is to be understood as used in the theory of probability. For instance, an event may be the occurrence of a(72) character or word in a given message or in a given position of a message.In communication theory, channel is defined as that part of a communication system that connects the message source with the message sink. An encoder may be inserted between the message source and the input to the channel, and a(73) between the output of the channel and the message sink. Generally, these two units are not considered as being parts of the channel. In certain cases, however, they may be considered as pans of the message source and message sink,(74) In information theory(75) to Shannon, the channel can be characterized by the set of conditional probabilities of occurrence of all the messages received at the message sink when a given message emanates from the message source.A．uncertaintyB．unreliabilityC．randomnessD．inconsistency
考题
What should be done if Cisco Spectrum Expert Wi-Fi reports a channel utilization of 40 percent onchannel 36， from a source outside of the site？（）A、Report the problem to the FCCB、Report the problem to the FAAC、Remove channel 36 from the DCA channel listD、Configure channel 36 to bond to channel 40 for a 40Mhz 802.11n channel
考题
What is the result of entering the command port-channel load-balance src-dst-ip on an EtherChannel link？ （）A、Packets are distributed across the ports in the channel based on both the source and destination MAC addresses.B、Packets are distributed across the ports in the channel based on both the source and destination IP addresses.C、Packets are balanced across the ports in the channel based first on the source MAC address， then on the destination MAC address， then on the IP address.D、Packets are distributed across the access ports in the channel based first on the source IP address and then the destination IP addresses.
考题
Which statement about SAN port channels configured on Cisco Nexus 5000 Series Switches is true？（） A、 A single SAN port channel can have both Fibre Channel and virtual Fibre Channel interfaces. B、 SAN port channels can include up to 16 interfaces.C、 SAN port channels distribute traffic across all links in the port channel when source ID and destination ID load balancing are used.D、 The links in SAN port channels can be connected to different sets of switches.E、 The On mode of operation means ports only operate as part of a SAN port channel or remain inactive.
考题
单选题Communication is the process of _____ a message from a source to an audience via a channel.A
transmittingB
transformingC
submittingD
switching
考题
单选题Which of the following statements is correct concerning heat transfer?（）A
Heat is given off from a high temperature region known as a heat sinkB
Heat transfer rate is affected most by the size of the heat sink involvedC
Heat transfer rate is affected most by the temperature difference between the heat source and the heat sinkD
Heat transfer by radiation will occur only by mass motion of a fluid substance
考题
单选题Which statement about SAN port channels configured on Cisco Nexus 5000 Series Switches is true？（）A
A single SAN port channel can have both Fibre Channel and virtual Fibre Channel interfaces. B
SAN port channels can include up to 16 interfaces.C
SAN port channels distribute traffic across all links in the port channel when source ID and destination ID load balancing are used.D
The links in SAN port channels can be connected to different sets of switches.E
The On mode of operation means ports only operate as part of a SAN port channel or remain inactive.
考题
(难度：中等)Kafka是分布式发布-订阅消息系统
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