For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the dest

题目

For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to. 空白（1）处应选择（）

  • A、connectionless
  • B、connection-oriented
  • C、datagram
  • D、telegram
相似考题

1.() the way we had come, we could see the whole valley spread out behind us.A、Looking backB、Having looked backC、To look backD、Being looked back

2.For (71) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (72) for every packet sent. Instead, when a connection is established, a route from the (73)machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (74) That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (75) telling which virtual circuit it belongs to.A．connectionlessB．connection-orientedC．datagramD．telegram

3.It is very kind ( ) you to let us use your running machine.Actually, it is good ( ) us to do some physical exercise every day.A、of/ ofB、of/ forC、for/ ofD、for/ for

4.● For （71） service, we need a virtual-circuit subnet. Let us see how that works. Theidea behind virtual circuits is to avoid having to choose a new （72） for every packet sent.Instead, when a connection is established, a route from the （73） machine to the destinationmachine is chosen as part of the connection setup and stored in tables inside the （74） . Thatroute is used for all traffic flowing over the connection, exactly the same way that thetelephone system works. When the connection is released, the virtual circuit is alsoterminated. With connection-oriented service, each packet carries an （75） telling whichvirtual circuit it belongs to.（71）A. connectionless B. connection-oriented C. datagram D. telegram（72）A. processor B. device C. route D. terminal（73）A. source B. route C. destination D. host（74）A. connections B. resources C. bridges D. routers（75）A. address B. identifier C. interface D. element

参考答案和解析
正确答案:B
更多“For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the dest”相关问题

  • 第1题：

    When a packet is sent from Host 1 to Server 1, in how many different frames will the packet be encapsulated as it is sent across the internetwork()。

    A.0

    B.1

    C.2

    D.3

    E.4


    参考答案：C

  • 第2题：

    We experience a burst of pleasure when we share our thoughts,and this drives us to communlcate.It is a useful feature of our brain,because it ensures that knowledge,experience and ideas do not get buried with the person who first had them,and that as a society we benefit from the products of many minds.Of course,in order for that to happen,merely sharing is not enough.We need to cause a reaction.Each time we share our opinions and knowledge,it is with the intention of having an impact on others.Here's the problem,though:we approach this task from inside our own heads.When attempting to create impact,we reflect on what is persuasive to us,our state of mind.our desires and our goals.But if we want to affect the behaviours and beliefs of the person in front of us,we need to understand what goes on inside their head.


    答案：
    解析：
    我们在分享自己的想法时会感到一阵愉悦．正是这种感觉驱使我们进行交流。我们大脑的这个特点非常有用．因为它保证了知识、经验和想法不会随着它们最初的拥有者而遭到埋没；我们作为一个社会，则能从许多聪明人的成果中受益。当然，要使这种情况发生，单纯的分享是不够的。我们需要引起一个反应。我们每次分享自己的意见和知识时，正是抱着对他人施加影响的目的。但这正是问题所在：我们从自己的内心出发处理这件事情。当我们试图造成影响时，我们回想对我们具有说服力的东西．我们的精神状态，我们的渴望以及我们的目标。但我们如果想影响我们面前这个人的行为和想法，却需要理解他们的脑子里在想什么。

  • 第3题：

    共用题干
    One Good Reason to Let Smallpox Live
    It's now a fair bet that we will never see the total extinction of the smallpox virus. The idea was to cap the glorious achievement of 1980,when smallpox was eradicated in the wild,by destroying the killer vims in the last two labs that are supposed to have it one in the US and one in Russia. if smallpox had truly gone from the planet,what point was there in keeping these reserves?
    _______(51)reality,of course,it was naive to _______(52)that everyone would let ________(53)of such a potent potential weapon. Undoubtedly several nations still have _______(54)vials._______(55)the last“official”stocks of live virus bred mistrust of the Us and Russia,_______ (56)no obvious gain.
    Now American researchers have________(57)an animal model of the human disease,opening the________(58)for tests on new treatments and vaccines.So once again there's a good reason to_______(59)the virusjust in_______(60)the disease puts in a reappearance.
    How do we_______(61)with the mistrust of the US and Russia?_______(62).Keep the virus________(63)international auspices in a well-guarded UN laboratory that's open to all countries. The US will object,of course,just at it rejects a multilateral approach to just about everything. But it doesn't_______(64)the idea is wrong. If the virus_______(65)useful, then let's make it the servant of all humanity—not just a part of it.

    61._________
    A:. handle
    B: tackle
    C: deal
    D: treat

    答案：C
    解析：
    in reality意为“实际上，事实上”，这是固定搭配。


    此处应填入一个非事实性动词。imagine是非事实性动词。know , realize和be aware都是事实性动词，所以不合适。属于非事实性动词的还有believe , think等。


    let跟动词原形，go符合这一原则。


    vials是复数，much不合适。另外，本句和上文都没有比较的意思，因此more和most也都不合适。


    上一句句末的标点符号表明本句是一个独立的句子。只有and可用于一个独立的句子，其他的选项都不可以。


    整个句子说的是美俄“官方”保存的最后的活病毒储备由于不能带来明显的好处而引起大家对这两个国家的不信任。no obvious gain是名词短语。for可跟名词短语，表示原因。because不跟名词短语。since可跟名词短语，但跟表示时间的名词短语。of 可跟名词短语，但常表示“所属”关系。


    opening the way for tests on new treatments and vaccines:“为试验新的治疗方法和新的疫苗开辟了道路”。这是句子的下半部分。可以看出，上半部分所描写的model应该是实际上存在的。此处应该用found。它是外延动词，表示model是存在的。looked for和sought是内涵动词。它们引起的名词短语并不一定有外延。因此是不合适的。talked about是“谈论”的意思。用在这里，也是不妥的。


    open the way是一种固定的说法，意思是“为某事的发生创造了条件”。类似的说法还有：clear the way , prepare the way等。


    keep the virus是“保存病毒”的意思。put the virus是不正确的，后面必须有地点状语。如：You can put the virus in a bottle. destroy the virus和eradicate the virus都是“消灭病毒”的意思，跟后半句话在意思上是矛盾的。


    incase是固定的说法，意思是“万一”。整个句子说的是：因此，又有了一个保存病毒的理由——万一这种病卷土重来。


    这几个选项意思差不多，但只有deal可跟with搭配。


    从紧随其后的句子来看，用simple是正确的。difficult , hard和safe都跟后面的句子在意思上不连贯。


    under the auspice。是固定的说法，意思是“赞同”、“支持”。


    It doesn't mean that…是一种固定的表达法。也可以说：It doesn't mean to saythat…


    本句是个条件句。从句中动词一般用现在时表示“未来”。这就排除了will be和would be。 virus是单数，因此D也不正确。

  • 第4题：

    For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to. 空白（2）处应选择（）

    • A、processor
    • B、device
    • C、route
    • D、terminal

    正确答案:C

  • 第5题：

    You have a server that runs Windows Server 2008. The server has the Windows Server virtualization roleservice installed and has one virtual machine. The virtual machine runs Windows Server 2008. You plan to install a new application on the virtual machine. You need to ensure that you can restorethe virtual machine to its original state in the event the application installation fails. What should you do？（）

    • A、Log on to the virtual host and enable the Remote Differential Compression Features.
    • B、Log on to the virtual host and enable the Windows Recovery Disk feature.
    • C、From Virtualization Management Console， create a snapshot.
    • D、From Virtualization Management Console， save the state of the virtual machine.

    正确答案:C

  • 第6题：

    When using VSD， traffic flow goes from the virtual machine to which of these？（）

    • A、 Upstream switch
    • B、 Virtual Supervisor Module
    • C、 VMware distributed switch
    • D、 VMware vSwitch
    • E、 Service virtual machine

    正确答案:E

  • 第7题：

    You create a virtual machine （VM） named Server1. You export the VM to the C:///VM folder. You need to import the VM from the correct folder. Which folder should you choose？（）

    • A、C:///VM
    • B、C:///VM/Server1
    • C、C:///VM/Server1/Virtual Hard Disks
    • D、C:///VM/Server1/Virtual Machines

    正确答案:B

  • 第8题：

    You have a server that runs Windows Server 2008. The server has the Windows Server virtualization role service installed and has one virtual machine. The virtual machine runs Windows Server 2008. You plan to install a new application on the virtual machine.  You need to ensure that you can restore the virtual machine to its original state in the event the application installation fails. What should you do？（）

    • A、Log on to the virtual host and enable the Remote Differential Compression Features.
    • B、Log on to the virtual host and enable the Windows Recovery Disk feature.
    • C、From Virtualization Management Console， create a snapshot.
    • D、From Virtualization Management Console， save the state of the virtual machine.

    正确答案:C

  • 第9题：

    Your virtual environment includes Hyper-V host servers and VMware ESX Server hosts. You manage the environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You need to enable non-administrative users to manage snapshots or checkpoints for virtual machines （VMs） that are hosted on either host system. What should you do？（）

    • A、Create checkpoints in VMM.
    • B、Create snapshots by using Hyper-V Manager.
    • C、Create checkpoints by using the VMM Self-Service Portal.
    • D、Create snapshots from within the Virtual Machine Connection console.

    正确答案:C

  • 第10题：

    单选题
    For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to. 空白（3）处应选择（）
    A

    source

    B

    route

    C

    destination

    D

    host


    正确答案： A
    解析： 对于面向连接的服务，我们需要一个虚拟电路子网。让我们看看它是如何工作的。虚电路的核心思想是避免在发送每个数据时为它们选择一个新的路由。相反，当建立一个连接，将从源计算机向目标计算机选择一条路由作为连接设置的一部分并且存储到内部的路由器表中。这条路由承载着所有连接带来的流量，就跟电话系统的工作原理一样。当连接被释放时，虚电路也终止。在面向连接的服务中，每个数据包携带一个标识符，该标识符告诉它所属的虚电路。

  • 第11题：

    单选题
    You have a server that runs Windows Server 2008. The server has the Windows Server virtualization role service installed.  You create a new virtual machine and perform an installation of Windows Server 2008 on the virtual machine. You configure the virtual machine to use the physical network card of the host server. You notice that you are unable to access network resources from the virtual machine. You need to ensure that the virtual host can connect to the physical network. What should you do？（）
    A

    On the host server， install the MS Loopback adapter.

    B

    On the host server， enable the Multipath I/O feature.

    C

    On the virtual machine， install the MS Loopback adapter.

    D

    On the virtual machine， install Windows Server virtualization Guest Integration Components.


    正确答案： A
    解析： 暂无解析

  • 第12题：

    In our comparison-soaked culture, it′s hard to avoid slipping into "Why can′t I" mode. When one of my colleagues (51)__________I think is not better than me published a new book, I couldn′t help (52) __________ (complain) how (53) __________ (achieve) it seemed to me and what bad luck I had. Negative feelings like this made life dark for us. How to get rid of the harmful effects of comparison needs exploring. Here′ s what I learned:
    Don′ t compare your insides to someone else′ s outsides.
    The first time I heard this excellent advice, I (54)__________(suffer) from terrible envy. My professor′s warning shocked me that "You have no idea what it (55) __________ (take) for them to get there". Don′t just owe it to pure luck. Instead, you should fad out what′s really going on behind the scenes.
    She was absolutely right, yet it′s much (56) __________ (easy) to envy what they′ve got than it is to ask the serious question: What are they modeling for me? What have they done to get (57) __________ they are today? When we reflect (58)__________ these questions, we shift immediately out of comparison mode and turn inwards.
    Transform comparison into celebration.
    Admiration and envy are responses pointing us toward what we value most. And once we become aware of what we value, we are much better positioned (59)__________ (create) a richly satisfying life. If you notice yourself admiring people who take creative risks, bring your full attention to the part of you that wants to be braver.
    Use the success of others as a mirror.
    Next time you catch yourself admiring or envying someone′s success, take a moment to consider: What qualities in them inspire me? Where do I presently display these qualities? Remember the light we see in (60) __________ can help us see our own.
    第（53）题答案


    答案：
    解析：
    unachievable。解析：考查seem的用法。seem可用作连系动词，意为“似乎，好像”，可用于“it seems+形容词+to sb．”结构中。根据后一句中的negative feelings可知此处需填入表示消极意义的词，故填 unachievable(难以实现的)。

  • 第13题：

    It's almost impossible to go through life without experiencing some kind of failure.People who do so probably live so cautiously that they go nowhere.Put simply,they’re not real living at all.But,the wonderful thing about failure is that it's entirely up to us to decide how to look at it.We can choose to see failure as"the end of the world,"or as proof of just how inadequate we are.Or,we can look at failure as the incredible learning experience that it often is.Every time we fail at something,we can choose to look for the lesson we're meant to learn.These lessons are very important;they're how we grow,and how we keep from making that same mistake again.Failures stop us only if we let them.Failure can also teach us things about ourselves that we would never have learned otherwise.For instance,failure can help you discover how strong a person you are.Failing at something can help you discover your truest friends,or help you find unexpected motivation to succeed.


    答案：
    解析：
    人的一生几乎不可能不经历某种失败。但是，失败的妙处就在于，完全由我们来决定如何看待它。我们可以选择将失败看作是“世界末日”。或者像以往一样，把它看作令人难以置信的学习经历。每当我们在某件事上失败时，我们会选择寻找应学习的教训。这些教训非常重要；他们教会我们如何成长，如何避免再次犯相同的错误。如果失败阻止我们前进，那么唯一的条件就是我们允许它的发生。失败还可以教会我们认识自己，那是我们在别处永远无法学习到的。例如，失败可以帮助你发现自己的能力。失败可以帮助你发现最真实的朋友，或者帮助你找到预料之外的成功动力。

  • 第14题：

    For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to. 空白（5）处应选择（）

    • A、address
    • B、identifier
    • C、interface
    • D、element

    正确答案:B

  • 第15题：

    What are two instances when a WX device route carves? （）(Choose two.)

    • A、It occurs every 29 hours.
    • B、Packet interception mode is enabled.
    • C、The host is unreachable on the local subnet.
    • D、The subnet is unreachable using the advertised router.

    正确答案:C,D

  • 第16题：

    Which connection type is available on a virtual switch?（）

    • A、service console port
    • B、ESX machine port group
    • C、virtual machine port group

    正确答案:A

  • 第17题：

    When a packet is sent from Host 1 to Server 1, in how many different frames will the packet be  encapsulated as it is sent across the internetwork?（）

    • A、0
    • B、1
    • C、2
    • D、3
    • E、4

    正确答案:D

  • 第18题：

    Your network consists of a single Active Directory domain.You implement a new subnet. On the new subnet， you install a new DHCP server that runs Windows Server 2003 Service Pack 2 （SP2）. You create a scope for the 192.168.10.0/24 network ID. You connect a new client computer named Client1 to the subnet. Client1 runs Windows XP Professional Service Pack 3 （SP3）. You discover that Client1 has an IP address of 169.254.10.22 and is configured to receive IP configurations automatically.You need to ensure that Client1 receives an IP configuration from Server1. What should you do？（）

    • A、Activate the DHCP scope.
    • B、Create a reservation for Client1.
    • C、Enable BOOTP forwarding on the router.
    • D、Configure a DHCP Relay Agent on the subnet.

    正确答案:A

  • 第19题：

    You have a server that runs Windows Server 2008 and has the Windows Server Virtualization （WSv）server role installed. You create a new virtual machine. You need to configure the virtual machine to meet the following requirements： Allow network communications between the virtual machine and the host system. Prevent communications with other network servers. What should you do first？（）

    • A、Install the Microsoft Loopback Adapter.
    • B、Create a new Virtual Network Switch.
    • C、Enable Internet Connection Sharing （ICS）.
    • D、Set the Connection to None for the network interface card.

    正确答案:B

  • 第20题：

    单选题
    When using VSD， traffic flow goes from the virtual machine to which of these？（）
    A

     Upstream switch

    B

     Virtual Supervisor Module

    C

     VMware distributed switch

    D

     VMware vSwitch

    E

     Service virtual machine


    正确答案： E
    解析： 暂无解析

  • 第21题：

    单选题
    For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to. 空白（1）处应选择（）
    A

    connectionless

    B

    connection-oriented

    C

    datagram

    D

    telegram


    正确答案： D
    解析： 对于面向连接的服务，我们需要一个虚拟电路子网。让我们看看它是如何工作的。虚电路的核心思想是避免在发送每个数据时为它们选择一个新的路由。相反，当建立一个连接，将从源计算机向目标计算机选择一条路由作为连接设置的一部分并且存储到内部的路由器表中。这条路由承载着所有连接带来的流量，就跟电话系统的工作原理一样。当连接被释放时，虚电路也终止。在面向连接的服务中，每个数据包携带一个标识符，该标识符告诉它所属的虚电路。

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