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網(wǎng)絡工程師每日一練試題內容(2025/8/14)
試題1
下圖中v0至v2的最短路徑長度為 ( ) 。
A、90
B、60
C、70
D、100
查看答案
試題參考答案:B
試題2
在SNMPv2中,一個實體發(fā)送一個報文,一般經過四個步驟:
加入版本號和團體名,構造報文;
把PDU、源和目標端口地址以及團體名傳送給認證服務,認證服務產生認證碼或對數(shù)據(jù)進行加密,返回結果;
根據(jù)要實現(xiàn)的協(xié)議操作構造PDU;
進行BER編碼,產生0/1比特串。
這四個步驟的正確次序是 ( ) 。
A、①③②④
B、③②①④
C、④①③②
D、②①③④
查看答案
試題參考答案:B
試題3
在防火墻域間安全策略中,不是outbound方向數(shù)據(jù)流的是( )。查看答案
試題參考答案:A
試題4
Software-defined networking(SDN)technology is an approachto(64)management that enables dynamic,progranmatically efficient network configuration in order to improve network performance and monitoring,in a manner more akin to(65)computing than to traditional network management. SDN archi tectures decouple network control and forwarding functions,enabling the network control to become directly(66)and the underlying infrastructure to be abstracted from applications and network services.SDN was commonly associated with the (67)protocol since the protocol's emergence in 2011. When using an SDN based model for transmitting multimedia traffic,an important aspect to take account is the(68)of Experience(QoE)estimation.To estimate theQoE,first we have to be able to classify the traffic and then,it's recommended that the system can solve critical problems on its own by analyzing the traffic.查看答案
試題參考答案:D、D、B、A、A
試題5
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6
4條路由:124.23.129.0/24,124.23.130.0/24,124.23.132.0/24和124.23.133.0/24經過匯聚后得到的網(wǎng)絡地址是( )。查看答案
試題參考答案:A
試題7
下面關于 VTP 修剪的論述中,錯誤的是( )。
A.靜態(tài)修剪就是手工剪掉中繼鏈路上不活動的 VLAN
B.動態(tài)修剪使得中繼鏈路上所有共享的 VLAN 都是活動的
C.靜態(tài)修剪要求在 VTP 域中的所有交換機都配置成客戶機模式
D.動態(tài)修剪要求在 VTP 域中的所有交換機都配置成服務器模式
查看答案
試題參考答案:C
試題8
以下關于以太網(wǎng)交換機的說法中,錯誤的是()。查看答案
試題參考答案:C
試題9
TCP是互聯(lián)網(wǎng)中的傳輸層協(xié)議,TCP協(xié)議進行流量控制的方式是 (1) ,當TCP實體發(fā)出連接請求(SYN)后,等待對方的 (2) 相應。
(1)A、使用停等ARQ協(xié)議
B、使用后退N幀ARQ協(xié)議
C、使用固定大小的滑動窗口協(xié)議
D、使用可變大小的滑動窗口協(xié)議
(2)A、SYN
B、FIN、ACK
C、SYN、ACK
D、RST
查看答案
試題參考答案:D、C
試題10
對一個新的QoS通信流進行網(wǎng)絡資源預約,以確保有足夠的資源來保證所請求的QoS,該規(guī)則屬于IntServ規(guī)定的4種用于提供QoS傳輸機制中的( )規(guī)則。查看答案
試題參考答案:A
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