题目内容（请给出正确答案）

[单选题]

Which type if port is used by HTTP for the control connection？（)

A.Ephemeral

B.Well-known

C.Dynamic

D.UDP

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更多“Which type if port is used by …”相关的问题

第1题

下列各协议层数据报文头部中的标识字段，哪一个不能够标识该层所承载的上层数据类型？（)

A.TTL

B.TYPE

C.Protocol

D.Source Port

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第2题

Which service, command or tool discovers the IP addresses of all computers or routers

A.Whois

B.Port scanner

C.Traceroute

D.Nslookup

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第3题

Which port or ports are used for SMTP？（)

A.20 and 21

B.25

C.53

D.161 and 162

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第4题

Which of the following choices lists the ports that Microsoft internal networking uses

A.UDP 137 and 138, and TCP 139

B.Ports 11, 112, and 79

C.UDP 1028, 31337 and 6000

D.Port 80, 134 and 31337

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第5题

Which of the following effects the size of a cell？（)

A.The type of BSC that the BTS is connected to

B.Timing Advance

C.Number of cells in a cluster

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第6题

About judging whether MAC address entries of PTN device are normal according to networ

k situation on site, which of the following is wrong？()

A.Execute Show lacp sys-id to check MAC address of local device rack, which is just the static MAC used for basic configuration of the device

B.Execute command show mac to check service MAC of peer device.

C.Execute command show lldp neighbor to display MAC of local device port, interconnected peer device port and its rack.

D.Execute show arp to show arp entries, which mark mac address and interface.

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第7题

Which security feature does NNTP possess that SMTP does not？（)

A.Dynamic port assignment

B.Separate control and data ports

C.Usable in conjunction with SSL

D.Strict bounds checking on arrays

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第8题

Which command should you enter to configure a single port to bypass the spanning-tree

A.spanning-tree portfast bpdufiter default

B.spanning-tree portfast default

C.spanning-tree portfast

D.spanning-tree portfast bpduguard default

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第9题

Which type of English words does the word “four modernizations” belong to（)

A.Loanwords

B.Loan translations

C.Idioms

D.Hybrids

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第10题

If a system is being developed where the customers are not sure of what they want,the requirements are often poorly defined. Which of the following would be an qppropriate process model for this type

If a system is being developed where the customers are not sure of what they want,the requirements are often poorly defined. Which of the following would be an appropriate process model for this type of development？()

：A.prototyping

B.waterfall

C.V-model

D.spiral

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