【正文】 因是什么？}A. minimum cell rate (MCR)B. quality of service (QoS)C. modulationD. packet switching exchange (PSE)E. reliable transport protocol (RTP)Answer: BSection: Chapter 9: SwitchingExplanation/Reference:考點：當(dāng)網(wǎng)絡(luò)中使用視頻會議后發(fā)現(xiàn)網(wǎng)絡(luò)非常慢，什么原因引起的？QoS：用于定制策略對不同流量進(jìn)行控制。QUESTION 18Which mand displays CPU utilization?{哪個命令顯示的 CPU 利用率呢？}A. show protocolsB. show processC. show systemD. show versionAnswer: BSection: Chapter 5: Managing Cisco IOSExplanation/Reference:查看CPU利用率。您已配置了地址后，路由器是無法 ping 任何遠(yuǎn)程設(shè)備。D/E：錯誤，都不能使他們在同一個子網(wǎng)。正確。在主機(jī)之間 ping 不成功。ping 。在這種情況下會發(fā)生什么？)A. giants frames could saturate the link.B. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send untagged frames.C. A native VLAN mismatch error message will appear.D. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send tagged frames.Answer: CSection: Chapter 10: VLANExplanation/Reference:QUESTION 4Which mand would correctly configure a serial port on a router with the last usable host address in the （哪個命令正確地將最后的可用主機(jī)地址，？）A. Router(configif) ip address B. Router(configif) ip address C. Router(configif) ip address D. Router(configif) ip address E. Router(configif) ip address F. Router(configif) ip address Answer: FSection: Chapter 4: Introduction to Cisco IOSExplanation/Reference:QUESTION 5The network default gateway applying to a host by DHCP is (應(yīng)用到由 DHCP 主機(jī)的網(wǎng)絡(luò)默認(rèn)網(wǎng)關(guān)是 \/28。 WORD格式可編輯 培訓(xùn)大講堂官方Y(jié)Y 頻道：3660mCCNA題庫考試代號： 640802考試時間：英文110+30=140分鐘通過分?jǐn)?shù)： 825題庫版本： 鴻鵠論壇招募CCNA、CCNP答疑講師答疑地點：鴻鵠官方Y(jié)Y頻道3660鴻鵠大講堂：CCNA題庫戰(zhàn)報交流：144288127 （500人超級群）CCNA題庫戰(zhàn)報交流區(qū)： 1000 G視頻教程免費下載：CCNA（640802）CCNA（640802）（情人節(jié)版）CCNA 題庫戰(zhàn)報500人超級 144288127V104系列是官方的終結(jié)版本，以后不會再出V105 V106 V108等等CCNA 最新題庫/最新戰(zhàn)報 發(fā)布區(qū)： 下載官方正版題庫、看最新考試戰(zhàn)報，請隨時關(guān)注 鴻鵠論壇 CCNA考試報名1900，詳情請聯(lián)系鴻鵠全國區(qū)十七名客服 712023090712023106========================================更新內(nèi)容：，確定經(jīng)典爭議題目答案；，VCE題庫增加中文注釋；，更新考試新增題目93Q,；，刪除部分舊題目，為目前最新官方正版題庫； 增加每日新題，修訂部分錯誤。哪個選項是有效的主機(jī)IP 地址？)A. B. C. D. E. Answer: CSection: Chapter 3: IP Addressing and VLSMExplanation/Reference:考點：考查VLSMA：超出范圍B：廣播地址C：正確D：網(wǎng)絡(luò)號E：超出范圍QUESTION 6Which two addresses can be assigned to a host with a subnet mask of ? (Choose two.){哪兩個地址可以分配給與子網(wǎng)掩碼 的主機(jī)？}A. B. C. D. E. Answer: BDSection: Chapter 3: IP Addressing and VLSMExplanation/Reference:考點：考查VLSMA：網(wǎng)絡(luò)號B/D：正確C：廣播地址E：網(wǎng)絡(luò)號QUESTION 7The network administrator has asked you to check the status of the workstation39。QUESTION 8Workstation A has been assigned an IP address of (Choose two.){A 工作站已分配 IP 地址為 \/28。允許在主機(jī)之間的通信，可以做兩件事情？（選擇兩個）。B：修改掩碼為25位，正確。QUESTION 9Your ISP has given you the address 39。什么在阻礙 pinging 遠(yuǎn)程設(shè)備的路由器？)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.Answer: BSection: Chapter 3: IP Addressing and VLSMExplanation/Reference:考點：考查VLSM。QUESTION 19When configuring a serial interface on a router, what is the default encapsulation?{在配置一個串行接口的路由器，什么是默認(rèn)的封裝？}A. atmdxiB. framerelayC. hdlcD. lapbE. pppAnswer: CSection: Chapter 14: Wide Area Network (WAN)Explanation/Reference:缺省封裝是HDLCQUESTION 20What must be set correctly when configuring a serial interface so that higherlevel protocols calculate the best route?{什么時，必須設(shè)置正確配置串行接口，以便更高級別的協(xié)議計算最佳路線？}A. bandwidthB. delayC. loadD. reliabilityAnswer: ASection: Chapter 6: IP RoutingExplanation/Reference:為了使高層路由協(xié)議計算最佳路由，串口的什么東西必須被設(shè)置正確？在接口下，只有帶寬是可以配置的。QUESTION 22Which 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 munication?{OSI 參考模型在哪一層負(fù)責(zé)確定接收程序的可用性和檢查足夠的資源，是否存在該通信？}A. transportB. networkC. presentationD. sessionE. applicationAnswer: ESection: Chapter 1: IntroductionExplanation/Reference:哪一層確定的接收程序的可用性？應(yīng)用層提供QUESTION 23Data 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?{數(shù)據(jù)傳輸速度慢的源和目標(biāo)之間。通過手工或者動態(tài)學(xué)習(xí)路由條目實現(xiàn)。屬于FR的數(shù)據(jù)包。 a modem converts analog signals from a router to a phone line.D. A CSU/DSU converts digital signals from a router to a leased line。C：使用portsecurity，正確。B：每個子接口需要一個獨立的網(wǎng)段，正確。QUESTION 33Refer to the exhibit. Addresses within the range A. debug ip natB. show accesslistC. show ip nat translationD. show ip nat statisticsAnswer: BSection: Chapter 8: NATExplanation/Reference:。D：查看靜態(tài)NAT。s IP address is on the wrong subnet.C. The client has an incorrect preshared key.D. The SSID is configured incorrectly on the client.Answer: DSection: Chapter 11: WirelessExplanation/Reference:客戶端無法連接到無限接入點，查看不到可用的無線信號。D：SSID配置不正確。錯誤QUESTION 40Refer to the exhibit. According to the routing table, where will the router send a packet destined for?A. B. C. D. Answer: CSection: Chapter 6: IP RoutingExplanation/Reference:路由查找原則：最長掩碼匹配原則。E：當(dāng)沖突解決后，地址會被顯示。QUESTION 44Refer to the exhibit. If number 2 is selected from the setup script, what happens when the user runs setupfrom a privileged prompt?A. Setup is additive and any changes will be added to the config script.B. Setup effectively starts the configuration over as if the router was booted for the first time.C. Setup will not run if an enable secret password exists on the router.D. Setup will not run, because it is only viable when no configuration exists on the router.Answer: ASection: Chapter 4: Introduction to Cisco IOSExplanation/Reference:[0]不保存進(jìn)入IOS命令配置模式[1]不保存返回設(shè)置模式[2]保存退出A：設(shè)置和改動被保存到配置腳本B：為有效地重新開始配置，如果路由器是第一次啟動的配置。QUESTION 46Refer to the