What is the first 24 bits in a MAC address called?（）A、NICB、BIAC、OUID、VAI

题目

What is the first 24 bits in a MAC address called?（）

  • A、NIC
  • B、BIA
  • C、OUI
  • D、VAI
相似考题

1.What date is it?()A.July twentieth-firstB.of July twenty-firstC.the twenty-first of JulyD.the twentieth-first of July

2.Embedded systems always require the user to manipulate bits inregisters or variables. Given an integer variable a, write two code fragments.The first should set bit 5 of a. The second shnuld clear bit 5 of a. In bothcases, the remaining bits should be unmodified.

3.What is the first 24 bits in a MAC address called?()A. NICB. BIAC. OUID. VAI

4.What should we read while previewing an article().A、Titles and subtitlesB、The first paragraphC、The first paragraphD、The first sentence of each remaining paragraph

更多“What is the first 24 bits in a M”相关问题

  • 第1题：

    What is the effect of the following access list condition access－list 101 permit ip 10.25.30.0 0.0.0.255 any()。

    A.permit all packets matching the first three octets of the source address to all destinations

    B.permit all packets matching the last octet of the destination address and accept all source addresses

    C.permit all packets from the third subnet of the network address to all destinations

    D.permit all packets matching the host bits in the source address to all destinations

    E.permit all packets to destinations matching the first three octets in the destination address


    参考答案：A

  • 第2题：

    What is jitter？（）

    • A、The total end-to-end delay
    • B、The variations of delay.
    • C、The delay caused by placing the bits on the wire.
    • D、The time it takes for the bits to transit the physical media.

    正确答案:B

  • 第3题：

    Which two QoS classification and marking statements are true？（）

    • A、 In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.
    • B、 In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field
    • C、 In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.
    • D、 The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.
    • E、 The 802.10 standard uses a three bitfield referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

    正确答案:B,E

  • 第4题：

    In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）

    • A、The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application
    • B、The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
    • C、To calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0
    • D、The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

    正确答案:C,D

  • 第5题：

    Which of the following are true regarding a network using a subnet mask of 255.255.248.0?（）

    • A、It corresponds to a Class A address with 13 bits borrowed.
    • B、It corresponds to a Class B address with 4 bits borrowed.
    • C、The network address of the last subnet will have 248 in the 3rd octet.
    • D、The first 21 bits make the host portion of the address.
    • E、This subnet mask allows for 16 total subnets to be created.
    • F、The subnetwork numbers will be in multiples of 8.

    正确答案:A,C,F

  • 第6题：

    What is the effect of the following access list condition access-list 101 permit ip 10.25.30.0 0.0.0.255 any（）。

    • A、permit all packets matching the first three octets of the source address to all destinations
    • B、permit all packets matching the last octet of the destination address and accept all source addresses
    • C、permit all packets from the third subnet of the network address to all destinations
    • D、permit all packets matching the host bits in the source address to all destinations
    • E、permit all packets to destinations matching the first three octets in the destination address

    正确答案:A

  • 第7题：

    单选题
    All units of the first batch were to be recalled due to the design flaws in ______.
    A

    its color.

    B

    its shape.

    C

    its quality.

    D

    All of the above.


    正确答案： C
    解析：
    录音中给出Apple召回第一批所有产品的原因是：表面容易破裂；黄白色粘稠体外渗；长期使用后机器内部出现咯咯的声音。上述都属于质量的问题。
    【录音原文】
    Apple released its first mobile phone in August. It’s plain white, has no buttons and looks like an egg. All units of the first batch had to be recalled due to design flaw: the surface cracks easily, and white and yellow goo leaks out. Long-term users complained of hearing clucking noises from inside.

  • 第8题：

    单选题
    Both TCP and UDP use port numbers of what length? TCP和UDP协议所使用到端口范围有多大（）
    A

    4bits.4比特

    B

    16bits.16比特

    C

    8bits8.比特

    D

    32bits.32比特


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    What will probably be the first stage of change as the sun becomes a red giant?
    A

    Its core will cool off and use less fuel.

    B

    Its surface will become hotter and shrink.

    C

    It will use up its thermonuclear energy.

    D

    Its center will grow smaller and hotter.


    正确答案： A
    解析：
    细节题。题干中的the first stage of change为关键信息，从而定位到文章第二段，该段第二句指出“距今大约五十亿年后，太阳的核会缩小并且会变得更热”，由此可知选项D为正确答案。

  • 第10题：

    单选题
    What is the effect of the following access list condition?  access-list 101 permit ip 10.25.30.0 0.0.0.255 any（）。
    A

    permit all packets matching the first three octets of the source address to all destinations

    B

    permit all packets matching the last octet of the destination address and accept all source addresses

    C

    permit all packets from the third subnet of the network address to all destinations

    D

    permit all packets matching the host bits in the source address to all destinations

    E

    permit all packets to destinations matching the first three octets in the destination address


    正确答案： A
    解析： 暂无解析

  • 第11题：

    问答题
    What is the first element for a child in his learning by imitation?

    正确答案： The need to find a way to achieve the certain result.
    解析：
    通过第三段首句“There is a second element at work in this situation.”可知儿童通过模仿学习的第一要素应在第二段中，即“He is seeking a response which will gain certain ends.”。

  • 第12题：

    多选题
    Which of the following are true regarding a network using a subnet mask of 255.255.248.0?（）
    A

    It corresponds to a Class A address with 13 bits borrowed.

    B

    It corresponds to a Class B address with 4 bits borrowed.

    C

    The network address of the last subnet will have 248 in the 3rd octet.

    D

    The first 21 bits make the host portion of the address.

    E

    This subnet mask allows for 16 total subnets to be created.

    F

    The subnetwork numbers will be in multiples of 8.


    正确答案： A,C
    解析： 暂无解析

  • 第13题：

    Both TCP and UDP use port numbers of what length? TCP和UDP协议所使用到端口范围有多大（）

    • A、4bits.4比特
    • B、16bits.16比特
    • C、8bits8.比特
    • D、32bits.32比特

    正确答案:B

  • 第14题：

    Which two QoS classification and marking statements are true？ （）

    • A、 In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.
    • B、 In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field.
    • C、 In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.
    • D、 The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.
    • E、 The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

    正确答案:B,E

  • 第15题：

    What is the minimum key size to enable SSH v2？（）

    • A、512 bits
    • B、768 bits
    • C、1024 bits
    • D、2048 bits

    正确答案:B

  • 第16题：

    After Effects 6、0可以用以下哪些通道量化指标来处理影片？（）

    • A、8 bits per channel
    • B、10 bits per channel
    • C、16 bits per channel
    • D、24 bits per channel
    • E、32 bits per channel

    正确答案:A,B,C

  • 第17题：

    The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.0 0.0.0.255 any What is the effect of this access list configuration?（）

    • A、permit all packets matching the first three octets of the source address to all destinations
    • B、permit all packet matching the last octet of the destination address and accept all source addresses
    • C、permit all packet matching the host bits in the source address to all destinations
    • D、permit all packet from the third subnet of the network address to all destinations

    正确答案:A

  • 第18题：

    What are two purposes of a forwarding class?（）

    • A、to rewrite the ToS bits in the IP header
    • B、to classify traffic
    • C、to identify traffic that should receive commom treatment
    • D、to assign traffic to output queues

    正确答案:C,D

  • 第19题：

    单选题
    What is jitter？（）
    A

    The total end-to-end delay

    B

    The variations of delay.

    C

    The delay caused by placing the bits on the wire.

    D

    The time it takes for the bits to transit the physical media.


    正确答案： C
    解析： 暂无解析

  • 第20题：

    问答题
    There is a word of 7 letters. The first 3 letters is for female, the first 4 is for a brave man, and the whole is for a brave woman. What word is this?

    正确答案： Heroine
    解析：
    Heroine意为“女英雄”。

  • 第21题：

    问答题
    What’s the meaning of “humor” in the first paragraph?

    正确答案： A good or bad mood.
    解析：
    词义理解题。由题干定位到文章第一段。首句提到，每当作者in serious humor时就会去威斯敏斯特教堂走走。之后又谈到，那里的一切使他忧郁，让他思绪万千，但是并不会让他不愉快。由此可以推测，humor指的是心情。

  • 第22题：

    单选题
    Before writing a book, the first thing is considering what to say.
    A

    you must first ponder what to say and what not to be said carefully

    B

    it’s extremely necessary that you know what to say

    C

    the first thing is to consider what to say

    D

    you must first ponder what to say and what not to say


    正确答案： B
    解析：
    该题考查的是主语“一致关系”。当before，when，while，if，unless，after等引导分词短语作状语时，这些状语的逻辑主语必须和主句的主语保持一致。因此D为正确答案。

  • 第23题：

    多选题
    In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）
    A

    The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application

    B

    The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

    C

    To calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0

    D

    The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application


    正确答案： D,A
    解析： 暂无解析

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