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Which one of the following protocols uses both UDP and TCP p

题目
单选题
Which one of the following protocols uses both UDP and TCP ports for the transport layer operation?（）
A

FTP

B

TFTP

C

SMTP

D

Telnet

E

DNS

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1题：

Which of the following protocols uses port 119, by default?()

A.NNTP

B.NTP

C.TFTP

D.FTP


参考答案：A

第2题：

Which of the following protocols use both TCP and UDP ports?()

A. FTP

B. SMTP

C. Telnet

D. DNS

E. All of the above


参考答案：D

第3题：

Which one of the following protocols uses both UDP and TCP ports for the transport layer operation?

A．FTP

B．TFTP

C．SMTP

D．Telnet

E．DNS


正确答案：E
解析：Explanation:TCPandUDPmustuseportnumberstocommunicatewiththeupperlayers.Portnumberskeeptrackofdifferentconversationscrossingthenetworksimultaneously.Originating-sourceportnumbersaredynamicallyassignedbythesourcehost,whichwillbesomenumberstartingat1024.1023andbelowaredefinedinRFC1700,whichdiscusseswhatiscalledwell-knownportnumbers.Virtualcircuitsthatdonotuseanapplicationwithawell-knownportnumberareassignedportnumbersrandomlychosenfromwithinaspecificrangeinstead.TheseportnumbersidentifythesourceanddestinationhostintheTCPsegment.OnlyDNSusesbothUDPandTCPport53.

第4题：

Which one of the following protocols uses both UDP and TCP ports for the transport layer operation?（）

  • A、FTP
  • B、TFTP
  • C、SMTP
  • D、Telnet
  • E、DNS

正确答案:E

第5题：

Which of the following protocols use both TCP and UDP ports?（）

  • A、FTP
  • B、SMTP
  • C、Telnet
  • D、DNS
  • E、All of the above

正确答案:D

第6题：

Which of the following protocols uses UDP to transfer files?()

A.FTP

B.SFTP

C.SMTP

D.TFTP


参考答案：D

第7题：

Which of the following protocols uses both TCP and UDP ports?()

A. SMTP

B. Telnet

C. FTP

D. DNS


参考答案：D

第8题：

Which of the following protocols can be found at the application layer?()

A.Telnet

B.TCP

C.SNMP

D.UDP


参考答案：A

第9题：

Which of the following protocols utilize UDP as the layer 4 transport mechanism?（）

  • A、TACACS
  • B、Telnet
  • C、SMTP
  • D、SNMP
  • E、HTTP
  • F、TFTP

正确答案:D,F

第10题：

NBAR supports all of these with the exception of which one？（）

  • A、HTTP
  • B、IP multicast
  • C、TCP flows with dynamically assigned port numbers
  • D、non-UDP protocols

正确答案:B

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