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網(wǎng)絡(luò)工程師每日一練試題(2024/11/29)

網(wǎng)絡(luò)工程師當(dāng)天每日一練試題地址:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8

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網(wǎng)絡(luò)工程師每日一練試題內(nèi)容(2024/11/29)

  • 試題1

    在Linux系統(tǒng)通過( )命令,可以拒絕IP地址為192.168.0.2的遠(yuǎn)程主機(jī)登錄到該服務(wù)器。
    A.iptables-A input-p tcp-s 192.168.0.2-source-port 22-j DENY
    B.iptables-A input-p tcp-d 192.168.0.2-source-port 22-j DENY
    C.iptables-A input-p tcp-s 192.168.0.2-destination-port 22-j DENY
    D.iptables-A input-p tcp-d 192.168.0.2-destination-port 22-j DENY

    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=2024/11/29

  • 試題2

    在 Linux 系統(tǒng)中,使用 Apache 服務(wù)器時(shí)默認(rèn)的 Web 根目錄是( )。
    A...\htdocs
    B./var/www/html
    C./var/www/usage
    D...\con

    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=2024/11/29

  • 試題3

    實(shí)現(xiàn)VPN的關(guān)鍵技術(shù)主要有隧道技術(shù)、加解密技術(shù)、  (1)  和身份認(rèn)證技術(shù)。如果需要在傳輸層實(shí)現(xiàn)VPN,可選的協(xié)議是  (2)  。
    (1)A、入侵檢測(cè)技術(shù)
    B、病毒防治技術(shù)
    C、安全審計(jì)技術(shù)
    D、密鑰管理技術(shù)
    (2)A、L2TP
    B、PPTP
    C、TLS
    D、IPSec

    查看答案

    試題參考答案:D、C

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/11/29

  • 試題4

    下列存儲(chǔ)器類型中,掉電后所存儲(chǔ)數(shù)據(jù)會(huì)丟失的是()。
    A.HDD
    B.eMMC
    C.SDRAM
    D.SSD

    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=2024/11/29

  • 試題5

    網(wǎng)絡(luò)192.21.136.0/24 和192.21.143.0/24匯聚后的地址是(   )。
    A.192.21.136.0/21
    B.192.21.136.0/20
    C.192.21.136.0/22
    D.192.21.128.0/21

    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=2024/11/29

  • 試題6

    在ATM網(wǎng)絡(luò)中,AAL5用于LAN仿真,以下有關(guān)AAL5的描述中不正確的是 ( ) 。
    A、AAL5提供面向連接的服務(wù)
    B、AAL5提供無連接的服務(wù)
    C、AAL5提供可變比特率的服務(wù)
    D、AAL5提供固定比特率的服務(wù)

    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=2024/11/29

  • 試題7

    在SNMP各項(xiàng)功能中屬于網(wǎng)絡(luò)控制功能的是 ( )。
    A.性能管理
    B.計(jì)費(fèi)管理
    C.配置管理
    D.故障管理

    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=2024/11/29

  • 試題8

    Network Addrees Translation(NAT) is an Internet standard that enables a local-area network to use one set of IP addresses for internet traffic and another set of ( ) IP addresses for external traffic. The main use of NAT is to limit the number of public IP addresses that an organization or company must use, for both economy and ( ) purposes. NAT remaps an IP address space into another by modifying network address information in the ( ) header of packets while they are in transit across a traffic routing device. It has become an essential tool in conserving global address space in the face of ( ) address exhaustion. When a packet traverses outside the local network, NAT converts the private IP address to a public IP address. If NAT runs out of public addresses,the packets will be dropped and ( )"host unreachable"packets will be sent.
    (1) A. local
    B. private
    C. public
    D. dynamic
    (2) A. political
    B. fairness
    C. efficiency
    D. security
    (3) A.MAC
    B. IP
    C.TCP
    D. UDP
    (4) A. IPv4
    B. IPv6
    C. MAC
    D. logical
    (5) A. BGP
    B. IGMP
    C. ICMP
    D. SNMP

    查看答案

    試題參考答案:C、D、B、A、C

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/11/29

  • 試題9

    ARP病毒通過()影響網(wǎng)絡(luò)通信。
    A.?dāng)r截和篡改IP數(shù)據(jù)包
    B.SYN泛紅占用大量網(wǎng)絡(luò)帶寬導(dǎo)致網(wǎng)絡(luò)擁塞
    C.偽造ARP請(qǐng)求或應(yīng)答來欺騙網(wǎng)絡(luò)中的設(shè)備
    D.加密網(wǎng)絡(luò)流量使其無法被正常解析

    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=2024/11/29

  • 試題10

    If two communicating entities are in different hosts connected by a network,there is a risk that PDUs will not arrive inthe order inwhich theywere sent , becausethey may traverse(70)paths through the network. If each PDUs is given a uniquenumber,andnumbersareassigned(71),thenit isa logicallysimpletaskforthereceivingentityto reorder(72 )PDUsonthebasisofsequence number.Aproblem with this scheme is that,with a(73)sequence number field, sequence number will repeat.Evidently , the maximumsequence numbermustbe(74)thanthemaximumnumber ofPDUsthatcouldbe outstandingat anytime.
    (70)A.same
    B.different
    C.single
    D.Unique
    (71)A.randomly
    B.equally
    C. uniformly
    D. Sequentially 
    (72)A.received
    B.sent
    C.transmitting
    D.Forwarding
    (73)A.various
    B.diverse
    C.finite
    D.infinite 
    (74)A.smaller
    B.greater
    C.less
    D.More

    查看答案

    試題參考答案:B、D、A、C、B

    試題解析與討論:m.xiexiliangjiufa.com/exam/ExamDay.aspx?t1=8&day=2024/11/29

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