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Which of the following class addresses is reserved for multi

题目
单选题
Which of the following class addresses is reserved for multicast？（）
A

 Class A

B

 Class B

C

 Class C

D

 Class D

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相似问题和答案

第1题：

Ezonexam has a Class C network and you need ten subnets. You wish to have as many addresses available for hosts as possible. Which one of the following subnet masks should you use?

A．255.255.255.192

B．255.255.255.224

C．255.255.255.240

D．255.255.255.248

E．None of the above


正确答案：C
解析：Explanation:Usingthe2n-2formula,wewillneedtouse4bitsforsubnetting,asthiswillprovidefor24-2=14subnets.Thesubnetmaskfor4bitsisthen255.255.255.240.IncorrectAnswers:A.Thiswillgiveusonly2bitsforthenetworkmask,whichwillprovideonly2networks.B.Thiswillgiveus3bitsforthenetworkmask,whichwillprovideforonly6networks.D.Thiswilluse5bitsforthenetworkmask,providing30networks.However,itwillprovideforonlyfor6hostaddressesineachnetwork,soCisabetterchoice.

第2题：

A Class C network address has been subnetted with a /27 mask.Which of the following addresses is a broadcast address for one of the resulting subnets?（）

  • A、201.57.78.33
  • B、201.57.78.64
  • C、201.57.78.97
  • D、201.56.78.97
  • E、201.57.78.159
  • F、201.57.78.254

正确答案:E

第3题：

Which of the following TCP／IP addresses is a Class C address?()

A.10.0.0.1

B.12.78.1.1

C.172.16.1.1

D.192.168.1.1


参考答案：D

第4题：

Which of the following printers prints multi-part forms at once？ （）

  • A、ink jet
  • B、thermal
  • C、impact
  • D、laser

正确答案:C

第5题：

A network administrator provides an IP address of 128.135.0.142 and a subnet mask of 255.0.0.0.  Once a ping is attempted， it fails.  Which of the following options is the most probable cause of the failed ping？（）

  • A、0 is not valid in an IP address
  • B、128 is a reserved network
  • C、The subnet mask should be 255.255.0.0. since it is a class B
  • D、A network problem has occurred since IP and subnet are valid

正确答案:C

第6题：

A Class C network address has been subnetted with a ／27 mask.Which of the following addresses is a broadcast address for one of the resulting subnets?()

A.201.57.78.33

B.201.57.78.64

C.201.57.78.97

D.201.56.78.97

E.201.57.78.159

F.201.57.78.254


参考答案：E

第7题：

Which of these is a valid differentiated services PHB？ （）

  • A、Guaranteed PHB
  • B、Class-Selector PHB
  • C、Reserved Forwarding PHB
  • D、Discard Eligible PHB
  • E、Priority PHB

正确答案:B

第8题：

Which of the following protocols is responsible for the resolution of IP addresses to MAC addresses?()

A. DHCP

B. ARP

C. DNS

D. RARP


参考答案：B

第9题：

Which three IP multicast related statements are true？ （Choose three.）  （）

  • A、 Multicast addresses 224.0.1.0 through 238.255.255.255 are called globally scoped addresses. They are used to multicast data between organizations and across the Internet
  • B、 The multicast address 224.0.0.1 is a globally scoped address that has been reserved for the Network  Time Protocol （NTP） by the IANA
  • C、 Multicast addresses 239.0.0.0 through 239.255.255.255 are called limited scope addresses. They are  constrained to a local group or organization
  • D、 Multicast addresses 224.0.0.5 and 224.0.0.6 are limited scoped addresses that have been reserved for  OSPF
  • E、 Multicast addresses 224.0.0.0 through 224.0.0.255 are used for network protocols on local LAN segments. Because they are always transmitted with a Time to Live （TTL） of 1， they are never forwarded  by a router

正确答案:A,C,E

第10题：

A server has a processor that allows it to calculate two applications at the same time. Which of the following describes this capability of the processor?（）

  • A、Dual processing
  • B、Multi-processing
  • C、Multi-tasking
  • D、Multi-threading

正确答案:D

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