100%無料CCT Routing and Switching 100-490問題集PDFお試しサンプル認定ガイドカバー率
PDF試験材料2024年最新の実際に出る100-490問題集
試験の準備のため、Ciscoは講師主導のコース、eラーニングモジュール、練習問題など、さまざまなトレーニング資源を提供しています。さらに、この試験のコースや学習資料を提供するサードパーティのトレーニングプロバイダーも多数あります。
Cisco 100-490試験に合格するためには、候補者はCiscoルーティングおよびスイッチングに関連する広範なトピックについての熟練度を示さなければなりません。LANスイッチング技術、IPルーティング技術、ネットワークインフラセキュリティ、トラブルシューティングを含みます。この試験は、候補者が基本的なネットワークトラブルシューティングタスクを実行し、一般的なネットワーク問題を識別して解決し、ネットワークセキュリティ対策を実装できる能力を検証するために設計されています。
Cisco 100-490認定試験は、Ciscoルーティングおよびスイッチングネットワークデバイスを使用しているネットワークエンジニアと技術者の知識とスキルをテストするように設計されています。この試験は、シスコデバイスでの経験があり、ネットワーキング分野でのキャリアを進歩させたい候補者を対象としています。 Cisco 100-490試験に合格することは、Ciscoルーティングと切り替えネットワークデバイスのサポートに関する候補者の専門知識の証です。
質問 # 22
Which Xmodem option is used to enhance error checking of an image that is copied to flash memory?
- A. -e
- B. -c
- C. -r
- D. -x
正解：B
質問 # 23
Which layer of the OSI model defines how data is formatted for transmission and how access to the physical media is controlled?
- A. presentation
- B. network
- C. data link
- D. transport
正解：C
解説：
The data link layer of the OSI model, which is Layer 2, defines how data is formatted for transmission and controls access to the physical media. This layer is responsible for the node-to-node delivery of data and handles error detection and correction from the physical layer. It also manages the way data packets are sent over the network, including the framing, addressing, and flow control. The data link layer ensures that messages are delivered to the proper device on a LAN using hardware addresses (MAC addresses) and translates messages from the network layer into bits for the physical layer to transmit Reference:
質問 # 24
Which device is a DTE device?
- A. DSL modem
- B. cable modem
- C. CSU/DSU
- D. router
正解：D
質問 # 25
Which type of physical connector does a Gigabit Ethernet port typically use?
- A. RJ-11
- B. DB-25
- C. RJ-9
- D. RJ-45
正解：D
質問 # 26
Which command displays the configuration register setting?
- A. show flash
- B. show running-config
- C. show config-register
- D. show version
正解：D
解説：
The show version command on Cisco devices provides a variety of system information, including:
Cisco IOS version: The version of the Cisco IOS software running on the device.
Boot image: The location of the IOS image used during startup.
Hardware information: Model, processor type, memory details.
Interfaces: A list of the device's interfaces.
Configuration register: The current value of the configuration register, typically displayed near the end of the output.
Why other options are incorrect:
show flash: Displays the contents of flash memory, but not the configuration register.
show running-config: Displays the currently active configuration, but the configuration register setting is not directly part of the running configuration.
show config-register: This is not a standard Cisco IOS command.
質問 # 27
Which type of transceiver module is used for 40 Gigabit Ethernet connectivity?
- A. SFP+
- B. GBIC
- C. XFP
- D. QSFP+
正解：D
解説：
Reference:
https://www.cisco.com/c/en/us/products/interfaces-modules/40-gigabit-modules/ index.html#:~:text=The%20Cisco%20QSFP%20BiDi%20transceiver,10%20Gigabit%20Ethernet%20fiber% 20infrastructure
質問 # 28
Which two statements about a SmartJack are true? (Choose two.)
- A. It regenerates the signal to compensate for signal degradation from line transmission.
- B. It acts as a concentration point for dial-in and dial-out connections.
- C. It operates at Layer 2 of the OSI model.
- D. It provides signal conversion.
- E. It provides channel testing.
正解：A、D
解説：
Section: Cisco Equipment and Related Hardware
質問 # 29
TFTP is a simple protocol for transferring files, such as a Cisco IOS or configuration file, from one device to another. Which device can be configured as a TFTP server?
- A. Cisco router
- B. Cisco Content Engine
- C. CSU/DSU
- D. modem
正解：A
質問 # 30
Which two commands set the configuration register value? (Choose two.)
- A. rommon>config-register 0x2102
- B. rommon>confreg 0x2102
- C. router(config)#confreg 0x2102
- D. router(config)#configuration-register 0x2102
- E. router(config)#config-register 0x2102
正解：B、E
解説：
Section: Cisco IOS Software Operation
質問 # 31
From a Windows command prompt, which command displays the local IP address of a computer?
- A. ipconfig
- B. ip config
- C. ipconfiguration
- D. ip configuration
正解：A
解説：
Section: Service-related Knowledge
質問 # 32
Which command provides detailed information about the components that are installed on a router, such as the model, PID, and serial number?
- A. show chassis
- B. show items
- C. show inventory
- D. show router
正解：C
解説：
Section: Cisco IOS Software Operation
質問 # 33
What are two purposes of a USB thumb drive? (Choose two.)
- A. to copy IOS images to and from a PC
- B. to copy configuration files to and from a PC
- C. to increase system memory size
- D. to save router hardware information
- E. to save the system log
正解：A、B
解説：
Section: Service-related Knowledge
質問 # 34
What are two standard fiber-optic connectors? (Choose two.)
- A. crossover
- B. rollover
- C. multidimension
- D. Lucent
- E. subscriber
正解：D、E
質問 # 35
What does Cisco use for Return Materials Authorization tracking of field-replaceable parts?
- A. RMA number
- B. product number
- C. FRU number
- D. serial number
正解：A
解説：
Section: Service-related Knowledge
質問 # 36
An Ethernet interface is up and the line protocol is down. What are two possible causes? (Choose two.)
- A. Keepalives are not being received by the local device.
- B. There is a speed or duplex mismatch with the remote device.
- C. The Ethernet interface has been manually disabled.
- D. The Ethernet cable might not be attached properly.
- E. There is a Layer 2 mismatch in the encapsulation type.
正解：B、E
解説：
Section: Service-related Knowledge
質問 # 37
To which value is the configuration register changed to bypass the loading of the startup configuration when performing a password recovery on a Cisco device?
- A. 0x2112
- B. 0x2102
- C. 0x2142
- D. 0x2122
正解：C
解説：
The configuration register on Cisco devices controls how the device boots up. By changing the configuration register to 0x2142, you instruct the router to bypass the startup configuration file stored in NVRAM. This is crucial in the password recovery process because the passwords are stored in this configuration file.
Procedure for Password Recovery:
1. Break the boot sequence: Power cycle the router (turn off/on). During the boot process, send a "Break" signal to get into ROMmon mode.
2. Change the configuration register: In ROMmon mode, type confreg 0x2142 and reload the router.
3. Boot without startup-config: The router will boot up, ignoring the saved startup configuration, allowing you to enter privileged EXEC mode without a password.
4. Change the password: Access configuration mode (configure terminal), and change the passwords as needed (enable password, enable secret, etc.).
5. Reset the configuration register: Set the configuration register back to its original value (usually 0x2102).
6. Save changes: Save the new configuration with copy running-config startup-config.
質問 # 38
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