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●We have already covered the topic of network addresses. The first(71) in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a (72) to s

题目

●We have already covered the topic of network addresses. The first(71) in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a (72) to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a (73)address in an lP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B,and C.

In classes A,B,and C,an address with all Is for the netid and hostid (32 bits) defines a( 74) address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However,a router will block a packet having this type ofaddress to confine the broadcasting to the (75) network. Note that this address belongs to class E.

(71) A.datagram

B.function

C.address

D.service

(72) A.router

B.switch

C.hub

D.firewall

(73)A.source

B.destination

C.local

D.remote

(74) A.unicast

B.multicast

C.broadcast

D.anycast

(75) A.neighbor

B.next

C.remote

D.local

相似考题

1.So far we ______ the first two chapters.(A) had overviewed(B) have overviewed(C) overviewed(D) overview

2." ( )people have already joined our health club, and we haven’t started advertising yet."A. lotB.FewC. Too fewD. A few

3.●A( 71) is a dedicated storage network that provides access to consolidated, block level storage. It is primarily used to make storage devices accessible to servers so that the devices appear as locally attached to the operating system.(71) A. network-attached storageB. storage area networkC. direct attached storageD. computer cluster

4.We've already sent out the invitation cards, but we don't know how many people_________.A.comeB.are comingC.cameD.have come

参考答案和解析
正确答案：C,A,B,C,D
更多“●We have already covered the topic of network addresses. The first(71) in a block (in clas ”相关问题

  • 第1题：

    － What if he still doesn't pay up －()

    A、If it's a small amount we write it off as bad debt. For larger sums we…

    B、I've got to hurry.

    C、I have already done that.


    参考答案：A

  • 第2题：

    “ ( )people have already joined our health club, and we haven’t started advertising yet.“

    A. lot

    B. Few

    C. A few

    D. Too few


    参考答案：C

  • 第3题：

    Where shall we have the meeting?()

    A. The first conference room is spacious

    B. The first conference room isn't good

    C. In the first conference room


    参考答案：C

  • 第4题：

    We should very much like to help you in this matter, but we have already cut our prices down to the absolute minimum.We think you will find that our competitors are offering a product of considerably lower quality in order to compete at this price.(英译中)


    参考答案：我们很乐意帮助你们，但是我们已将价格降到最低限度。你们将会发现：本公司的竞争者是在以大幅度降低产品质量的方式来压低价格的。

  • 第5题：

    Networks can be interconnected by different devices in the physical layer networks can be connected by (71) or hubs．which just move the bits from one network to an identical network．One layer up we find bridges and switches which operate at data link layer．They can accept (72) ，examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process in me network layer，we have routers that can connect two networks，If two networks have (73) network layer，the router may be able to translate betweenthe packer formats．In the transport layer we find transport gateway，which can interface between two transport connections Finally，in the application layer，application gateways translate message (74) ．As an example，gateways between Internet e-mail and X，400 e-mail must (75) thee-mail message and change various header fields．

    (68)

    A．reapers

    B．relays

    C．packages

    D．modems


    正确答案：A

  • 第6题：

    While teaching, we should keep our clas running smoothly and

    A．thoroughly
    B．efficiently
    C．speedily
    D．directly

    答案：B
    解析：
    考查副词辨析。句意为“教学过程中，我们应该保持课堂活动流畅而又__________地进行”。thoroughly意为“彻底地”，efficiently意为“高效地”，speedily意为“迅速地”，directly意为“直接地”。根据句意，故选B。

  • 第7题：

    We have already covered the topic of network addresses. The first（） in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a.（72） to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a （73）address in an lP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B,and C.
    In classes A,B,and C,an address with all Is for the netid and hostid (32 bits) defines a（74） address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However,a router will block a packet having this type ofaddress to confine the broadcasting to the （75） network. Note that this address belongs to class E.

    A.datagram
    B.function
    C.address
    D.service

    答案：C
    解析：

  • 第8题：

    A:Where shall we have the meeting? B:（）

    AThe first conference room is spacious

    BThe first conference room isn't good

    CIn the first conference room


    C
    略

  • 第9题：

    翻译：Now that we have already made an inquiry on your articles, will you please make an offer before the end of this month?


    正确答案: 由于我们公司已经有个关于你们商品的询价，贵司能否在月底前提供下报价？

  • 第10题：

    There are 3 steps to confirm whether a range of IP address can be summarized. When of thefollowing is used in each of these 3 steps？（）

    • A、 The first number in the contiguous block of addresses
    • B、 The last number in the contiguous block of addresses
    • C、 The size of the contiguous block of addresses
    • D、 The subnet mask of the original network address

    正确答案:A

  • 第11题：

    单选题
    There are 3 steps to confirm whether a range of IP address can be summarized. When of thefollowing is used in each of these 3 steps？（）
    A

     The first number in the contiguous block of addresses

    B

     The last number in the contiguous block of addresses

    C

     The size of the contiguous block of addresses

    D

     The subnet mask of the original network address


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    What does the author mean by moms to be in the last paragraph?
    A

    Women who are pregnant, especially for the first time.

    B

    Women who dream of having babies for the first time.

    C

    Women who already have children.

    D

    Women who have just got babies for the first time.


    正确答案： A
    解析：

  • 第13题：

    － Where shall we have the meeting －()

    A、In the first conference room.

    B、The first conference room is spacious.

    C、The first conference room isn’t good.


    参考答案：A

  • 第14题：

    John and I ______ friends for eight years. We first went to know each other at a Christmas party. But we ______ each other a couple of times before that.

    A had been; have seen

    B have been; have seen

    C had been; had seen

    D have been; had seen


    参考答案：D

  • 第15题：

    ()separate cover, we have already sent you samples () various sizes of shoes.

    A、Below,of

    B、Under,of

    C、By,of

    D、By,including


    参考答案：B

  • 第16题：

    It is already twenty years ____ we ____ to know Mr. White in Paris.

    A. after … got

    B. after …have got

    C. since … got

    D. since …have got


    答案：C

  • 第17题：

    Refer to the above exhibit. Why are the EIGRP neighbors for this router not learning the routes redistributed from OSPF?()

    A. Redistribution must be enabled mutually (in both directions) to work correctly.

    B. auto - summary causes the OSPF routes redistributed into EIGRP to be summarized; thus the OSPF network 116.16.34 is summarized to 116.3 4.0.0, which is already covered by the EIGRP protocol.

    C. Default metrics are not configured under EIGRP.

    D. Both routing protocols must have unique autonomous system numbers for redistribution to function correctly.


    参考答案：C

  • 第18题：

    The villagers have already known __________ we'll do is to build the bridge.

    A.this
    B.that
    C.what
    D.which

    答案：C
    解析：
    分析句子结构可知，空格处引导主语从句并在从句中作do的宾语，四个选项中只有what有这种用法，故选C。

  • 第19题：

    We have already covered the topic of network addresses. The first（71） in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a.（72） to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a （73）address in an lP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B,and C.
    In classes A,B,and C,an address with all Is for the netid and hostid (32 bits) defines a（） address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However,a router will block a packet having this type ofaddress to confine the broadcasting to the （75） network. Note that this address belongs to class E.

    A.unicast
    B.multicast
    C.broadcast
    D.anycast

    答案：C
    解析：

  • 第20题：

    A:Where shall we have the meeting? B:（）

    • A、The first conference room is spacious
    • B、The first conference room isn't good
    • C、In the first conference room

    正确答案:C

  • 第21题：

    If business had been carried out to our satisfaction，we（）to renew the Agency Agreement.

    • A、had agreed
    • B、already agreed
    • C、shall agree
    • D、should have agreed

    正确答案:D

  • 第22题：

    单选题
    We usually have the first class ______ 8:00 in the morning.
    A

    of

    B

    in

    C

    on

    D

    at


    正确答案： D
    解析：
    句意：我们一般早上8点钟上第一堂课。本题考查时间介词。in表示时间时，意为“在……期间；在（一段时间）以内”。on后多接日期、星期。at后接几点。故正确答案为D项。

  • 第23题：

    问答题
    翻译：Now that we have already made an inquiry on your articles, will you please make an offer before the end of this month?

    正确答案： 由于我们公司已经有个关于你们商品的询价，贵司能否在月底前提供下报价？
    解析： 暂无解析

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