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網(wǎng)絡(luò)工程師每日一練試題（2024/5/8）

來(lái)源：信管網(wǎng) 2024年05月09日【所有評(píng)論】

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網(wǎng)絡(luò)工程師每日一練試題內(nèi)容（2024/5/8）

試題1
一臺(tái)16口的全雙工千兆交換機(jī)，至少需要（）的背板帶寬才能實(shí)現(xiàn)線速轉(zhuǎn)發(fā)。
A．1.488Gbps
B．3.2Gbps
C．32Gbps
D．320Gbps
查看答案
試題參考答案：C
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題2
IP地址塊112.56.80.192/26包含了（1）個(gè)主機(jī)地址，不屬于這個(gè)網(wǎng)絡(luò)的地址是（2）。
（1）A.15
B.32
C.62
D.64
（2）A.112.56.80.202
B.112.56.80.191
C.112.56.80.253
D.112.56.80.195
查看答案
試題參考答案：C、B
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題3
關(guān)于IGMP協(xié)議的描述中，正確的是：
A.IGMPv1具有組成員快速離開(kāi)機(jī)制
B.IGMP決定數(shù)據(jù)報(bào)文在路由器之間如何轉(zhuǎn)發(fā)
C.IGMP組播成員管理機(jī)制是針對(duì)第2層設(shè)計(jì)的
D.IGMP監(jiān)聽(tīng)可解決第2層環(huán)境中的組播報(bào)文泛濫問(wèn)題
查看答案
試題參考答案：C
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題4

以下IP地址中，既能作為目標(biāo)地址又能作為源地址，且以該地址為目的地址的報(bào)文在Internet上通過(guò)路由器進(jìn)行轉(zhuǎn)發(fā)的是( )。
A.0.0.0.0
B.127.0.0.1
C.100.10.255.255/16
D.202.117.112.5/24
查看答案
試題參考答案：D
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題5

公鑰體系中，私鑰用于?。?）　，公鑰用于?。?）　。
（1）A、解密和簽名
B、加密和簽名
C、解密和認(rèn)證
D、加密和認(rèn)證
（2）A、解密和簽名
B、加密和簽名
C、解密和認(rèn)證
D、加密和認(rèn)證
查看答案
試題參考答案：A、D
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題6
DHCP（）報(bào)文的目的IP地址為255．255．255．255。
A．DhcpDisover
B．DhcpOffer
C．DhcpNack
D．DhcpAck
查看答案
試題參考答案：A
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題7

IPv6地址分為3種類型，它們是( )。
A、A類地址、B類地址、 C類地址
B、單播地址、組播地址、任意播地址
C、單播地址、組播地址、廣播地址
D、公共地址、站點(diǎn)地址、接口地址
查看答案
試題參考答案：B
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題8

The usual way to ensure reliable delivery is to provide the （1） with some feedback about what is happening at the other end of the line. Typically, the protocol calls for the receiver to send back special （2） frame bearing positive or negative （3） about the incoming frames. If the sender receives a positive acknowledgement about a frame, it knows the the frame has arrived safely. On the other hand, a negative acknowledgement means that something has gone wrong, and the frame must be transmitted again.
An additional complication comes from the possibility that hardware troubles may cause a frame to （4） completely. In this case, the receiver will not react at all, since it has no any reason to react. It should be clear that a protocol in which the sender transmits a frame and then waits for an acknowledgement, positive or negative, will hang forever if a frame is ever lost due to, for example, （5） hardware.。
（1）A、receiver
B、controller
C、sender
D、customer
（2）A、data
B、controll
C、request
D、session
（3）A、application
B、connection
C、stream
D、acknowledgement
（4）A、vanish
B、vary
C、appear
D、incline
（5）A、acting
B、working
C、malfunctioning
D、functioning
查看答案
試題參考答案：C、B、D、A、C
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題9
關(guān)于Internet域名服務(wù)系統(tǒng)的描述中，正確的是：
A．域名解析的兩種方式為重復(fù)解析和反復(fù)解析
B．域名解析可以從根域名服務(wù)器開(kāi)始
C．“非權(quán)威”的解析結(jié)果是由解析器造成的
D．使用高速緩沖技術(shù)可提高域名解析的準(zhǔn)確性
查看答案
試題參考答案：B
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8
試題10
Network firewalls are security devices used to stop or mitigate() access to private networks connected to the lnternet, especially intranets. The only traffic allowed on the network is defined via firewall ()-any other traffic attempting to access the network is blocked. Network firewalls sit at the () line of a network, acting as a communications liaison between internal and external devices, When properly configured, a firewall allows users to access any of the resources they need while simultaneously keeping out unwanted accesses. In addition to limiting access to a protected computer and network, a firewall can () all traffic coming into or leaving a network, and manage remote access to a private network through secure authentication certificates and logins. () firewalls examine every packet that passes through the network and then accept or deny it as defined by rules set by the user.
A．Unauthorized
B．a(chǎn)uthorized
C．normal
D．frequent

A．Ports
B．policies
C．commands
D．status

A．Front
B．back
C．second
D．last

A．Reply
B．block
C．log
D．encrypt

A．Application-layer
B．Packet filtering
C．Circuit-level
D．Proxy server

查看答案
試題參考答案：A、B、A、A、B
試題解析與討論：www.xcpkj.com/exam/ExamDay.aspx?t1=8&day=2024/5/8

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