QUESTION 4
Which command would correctly configure a serial port on a router with the last usable host address in the 192.216.32.32/29 subnet? A. Router(config-if)# ip address 192.216.32.38 255.255.255.240 B. Router(config-if )# ip address 192.216.32.39 255.255.255.224 C. Router(config-if)# ip address 192.216.32.63 255.255.255.248 D. Router(config-if)# ip address 192.216.32.39 255.255.255.248 E. Router(config-if)# ip address 192.216.32.63 255.255. 255.248 F. Router(config-if)# ip address 192.216.32.38 255.255.255.248 |
問題4
哪個指令會在路由器正確配置串列埠, 並擁有最後一個可用的主機地址在 192.216.32.32/29子網? A. Router(config-if)# ip address 192.216.32.38 255.255.255.240 B. Router(config-if )# ip address 192.216.32.39 255.255.255.224 C. Router(config-if)# ip address 192.216.32.63 255.255.255.248 D. Router(config-if)# ip address 192.216.32.39 255.255.255.248 E. Router(config-if)# ip address 192.216.32.63 255.255. 255.248 F. Router(config-if)# ip address 192.216.32.38 255.255.255.248 |
答:F
192.216.32.32/29它的塊大小為8,掩碼為255.255.255.248地址範圍為192.216.32.32-39 |
QUESTION 5
The network default gateway applying to a host by DHCP is 192.168.5.33/28. Which option is the valid IP address of this host? A. 192.168.5.55 B. 192.168.5.47 C. 192.168.5.40 D. 192.168.5.32 E. 192.168.5.14 |
問題5
適用於一台主機通過DHCP網絡的預設閘道是192.168.5.33/28。哪個選項是該主機有效的IP 地址? A. 192.168.5.55 B. 192.168.5.47 C. 192.168.5.40 D. 192.168.5.32 E. 192.168.5.14 |
答:C
192.168.5.33/28所在網段的範圍是192.168.5.32--192.168.5.47/28 A:超出範圍 B:廣播地址 C:正確 D:網絡號 E:超出範圍 |
QUESTION 6
Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0? (Choose two.) A. 113.10.4.0 B. 186.54.3.0 C. 175.33.3.255 D. 26.35.2.255 E. 17.35.36.0 |
問題6
哪兩個位址可以分配給主機,子網掩碼為255.255.254.0?(選擇兩項)。 A. 113.10.4.0 B. 186.54.3.0 C. 175.33.3.255 D. 26.35.2.255 E. 17.35.36.0 |
答:BD
B / D:正確 C:廣播位址 A / E:網路ID |
QUESTION 7
The network administrator has asked you to check the status of the workstation's IP stack by pinging the loopback address. Which address would you ping to perform this task? A. 10.1.1.1 B. 127.0.0.1 C. 192.168.0.1 D. 239.1.1.1 |
問題7
網絡管理員要求你ping環回地址來檢查工作站的IP堆棧的狀態。你應該選擇哪個位址以執行此任務? A. 10.1.1.1 B. 127.0.0.1 C. 192.168.0.1 D. 239.1.1.1 |
答:B
使用ping來檢測主機的IP。ping 127.0.0.1實現。 |
QUESTION 8
Workstation A has been assigned an IP address of 192.0.2.24/28. Workstation B has been assigned an IP address of 192.0.2.100/28. The two workstations are connected with a straight-through cable. Attempts to ping between the hosts are unsuccessful . What two things can be done to allow communications between the hosts? (Choose two.) A. Replace the straight-through cable with a crossover cable. B. Change the subnet mask of the hosts to /25. C. Change the subnet mask of the hosts to /26. D. Change the address of Workstation A to 192.0.2.15. E. Change the address of Workstation B to 192.0.2.111. |
問題8
工作站A被分配的IP地址為192.0.2.24/28。工作站B被分配的的IP地址為192.0.2.100/28。這兩個工作站與直通電纜連接。兩主機主機之間無法成功互ping。哪兩件事可以讓主機之間互通?(選擇兩項) A. 更換用交叉線直通電纜。 B. 改變主機/ 25的子網掩碼。 C. 更改/ 26的主機的子網掩碼。 D. 改變的工作站一個地址為192.0.2.15。 E. 改變的工作站一個地址為192.0.2.111。 |
答:AB
考點:同構設備使用交叉線,兩端的IP需要在同一個子網。 A:使用交叉線替換現有的直通線。正確。 B:修改掩碼為25位,正確。 C:修改掩碼為26為,錯誤。不能使他們在同一個子網。 D/E:錯誤,都不能使他們在同一個子網。 |
QUESTION 9
Your ISP has given you the address 223.5.14.6/29 to assign to your router's interface. They have also given you the default gateway address of 223.5.14.7. After you have configured the address, the router is unable to ping any remote devices. What is preventing the router from pinging remote devices? A. The default gateway is not an address on this subnet. B. The default gateway is the broadcast address for this subnet. C. The IP address is the broadcast address for this subnet. D. The IP address is an invalid class D multicast address. |
問題9
ISP提供給你的地址為223.5.14.6/29, 以分配為你的路由器的接口。他們也將預設閘道地址給你, 為223.5.14.7。在你已經設置地址後,路由器無法ping任何遠端設備。是什麼原因阻止了路由器ping遠程設備? A. 默認網關是不,該網段上的地址。 B. 默認網關是這個子網的廣播地址。 C. IP地址是該子網的廣播地址。 D. IP地址是一個無效的D類組播地址。 |
答: B
考點:考VLSM。 223.5.14.6/29所在網段的範圍是:223.5.14.0--223.5.14.7/29 A:默認網關不屬於這個子網,錯誤 B:默認網關是這個子網的廣播地址,正確 C:這個地址是子網的廣播地址,錯誤 D:這個地址是組播地址,錯誤。 |
QUESTION 21
A company implements video conferencing over IP on their Ethernet LAN. The users notice that the network slows down, and the video either stutters or fails completely. What is the most likely reason for this? A. minimum cell rate (MCR) B. quality of service (QoS) C. modulation D. packet switching exchange (PSE) E. reliable transport protocol (RTP) |
問題21
A公司實施他們的乙太區域網路 IP視訊會議。使用者注意到網絡速度變慢, 視訊不是停滯, 就是完全連線失敗。最有可能的原因是什麼? A. 最小信元速率(MCR) B.質量服務(QoS) C.調製 D.分組交換機(PSE) E.可靠傳輸協議(RTP) |
答:B
考點:當網絡中使用視頻會議後發現網絡非常慢,什麼原因引起的? 服務質量:用於定制策略對不同流量進行控制。 |
QUESTION 22
Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication? A. transport B. network C. presentation D. session E. application |
問題22
在OSI參考模型的哪一層是負責確定接收程序的可行性, 以及檢查是否存有足夠的資源達成通訊的目標? A. 運輸 B. 網絡 C. 介紹 D. 會話 E. 應用 |
答:E
哪一層確定的接收程序的可用性?應用層提供 |
QUESTION 23
Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin? A. presentation B. session C . transport D. network E. physical |
問題23
來源端和目地端之間的數據傳輸速度緩慢。OSI參考模型的傳輸層所要求的的服務品質沒有妥善維護。要解決這個問題在哪一層排除故障呢? A. 介紹 B. 會議 C.運輸 D.網絡 E.物理 |
答:D
解決網絡問題,先確保網絡層通信。 |
QUESTION 24
Which protocols are found in the network layer of the OSI reference model and are responsible for path determination and traffic switching? A. LAN B. routing C. WAN D. network |
問題24
哪些協議在OSI參考模型的網絡層,負責路徑的判定和流量交換? A. LAN B. 路由 C. 廣域網 D. 網絡 |
答:B
OSI網絡層中什麼提供了路徑選擇和流量轉發?由路由協議提供。通過手工或者動態學習路由條目實現。 |