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網(wǎng)絡工程師每日一練試題(2024/6/14)

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網(wǎng)絡工程師每日一練試題內容(2024/6/14)

  • 試題1

    以下關于三重DES加密算法的描述中,正確的是(  )。
    A.三重DES加密使用兩個不同密鑰進行三次加密
    B.三重DES加密使用三個不同密鑰進行三次加密
    C.三重DES加密的密鑰長度是DES密鑰長度的三倍
    D.三重DES加密使用一個密鑰進行三次加密

    查看答案

    試題參考答案:A

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題2

    Windows Server 2003中能夠發(fā)送SNMP請求報文并能對SNMP報文進行解析的服務為  (1)  ;用以監(jiān)聽被管主機發(fā)送來的陷入報文的服務為  (2)  。
    (1)A、NMP Service
    B、Task Scheduler
    C、Terminal Services
    D、SNMP Trap Service
    (2)A、SNMP Service
    B、Task Scheduler
    C、Terminal Services
    D、SNMP Trap Service

    查看答案

    試題參考答案:A、D

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題3

    如果用戶網(wǎng)絡需要劃分成5個子網(wǎng),每個子網(wǎng)最多20臺主機,則適用的子網(wǎng)掩碼是 ( ) 。
    A、255.255.255.192
    B、255.255.255.240
    C、255.255.255.224
    D、255.255.255.248

    查看答案

    試題參考答案:C

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題4

    IEEE802.11MAC子層定義的競爭性訪問控制協(xié)議是(66) 。
    A.CSMA/CA
    B.CSMA/CB
    C.CSMA/CD
    D.CSMA/CG

    查看答案

    試題參考答案:A

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題5

    一個項目為了修正一個錯誤而進行了變更。這個變更被修正后,卻引起以前可以正確運行的代碼出錯。 ( ) 最可能發(fā)現(xiàn)這一問題。
    A、單元測試
    B、接受測試
    C、回歸測試
    D、安裝測試

    查看答案

    試題參考答案:C

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題6

    Let us now see how randomization is done when a collision occurs . After a (1), time is divided into discrete slots whose length is equal to the worst-case round-trip propagation time on ether. To accommodate the longest path allowed by Ethernet, the slot time has been set to 512 bit times, or 51.2us.
    After the first collision, each station waits either 0 or 1 (2) times before trying again. If two stations collide and each one picks the same random number, they will collide again. After the second collision, each one picks either 0,1,2 or 3 at random and waits that number of slot times. If a third collision occurs (the probability of this happening is 0.25), then the next time the number of slots to wait is chosen at (3) from the interval 0 to 23-1.
    In general, after I collisions, a random number between 0 and 2i -1 is chosen, and that number of slots is skipped. However, after ten collisions have been reached, the randomization (4) is frozen at a maximum of 1023 slots. After 16 collisions, the controller throws in the towel and reports failure back to the computer. Further recoveries up to (5) layers.

    (1)A.datagram
     B.collision
     C.connection
    D.service
    (2)A.slot
     B.switch
     C.process
     D.fire
    (3)A.rest
     B.random
     C.once
     D.odds
    (4)A.unicast
     B.multicast
     C.broadcast
     D.interval
    (5)A.local
     B.next
     C.higher
     D.lower

    查看答案

    試題參考答案:B、A、B、D、C

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題7

    IPv6鏈路本地單播地址的前綴為(   ).
    A.001
    B.1111 1110 10
    C.1111 1110 11
    D.1111 1111

    查看答案

    試題參考答案:B

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題8

    在CPU和主存之間設計Cache的目的是()。
    A.增大主存的帶寬
    B.擴大主存容量
    C.提升CPU訪問主存的效率
    D.提升DMA訪問主存的效率

    查看答案

    試題參考答案:C

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題9

    下列端口號中,()是電子郵件發(fā)送協(xié)議默認的服務端口號。
    A.23
    B.25
    C.110
    D.143

    查看答案

    試題參考答案:B

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

  • 試題10

    嗅探器可以使網(wǎng)絡接口處于雜收模式,在這種模式下,網(wǎng)絡接口 ( ) 。
    A、只能夠響應與本地網(wǎng)絡接口硬件地址相匹配的數(shù)據(jù)幀
    B、只能夠響應本網(wǎng)段的廣播數(shù)據(jù)幀
    C、只能響應組播信息
    D、能夠響應流經(jīng)網(wǎng)絡接口的所有數(shù)據(jù)幀

    查看答案

    試題參考答案:D

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/6/14

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