素晴らしい100-490試験問題集試そう100-490問題集PDF
100-490問題集PDFで100-490リアル試験問題解答
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サポートするために必要な知識とスキルを検証することを目的としています。中級レベルの試験で、ネットワークプロフェッショナルはネットワークサポートおよびトラブルシューティングの専門知識を向上させたい場合に適しています。
質問 # 39
What are two standard fiber-optic connectors? (Choose two.)
- A. subscriber
- B. rollover
- C. crossover
- D. multidimension
- E. Lucent
正解：A、E
質問 # 40
Which type of port is used to connect a laptop to an Ethernet port on a Cisco router?
- A. rollover
- B. crossover
- C. fiber
- D. straight-through
正解：D
解説：
Section: Service-related Knowledge
質問 # 41
Cisco NX-OS has added the ability to use which type of custom scripting to help manage user networks?
- A. Collective
- B. SQL
- C. C++
- D. Python
正解：D
解説：
Section: Cisco IOS Software Operation
質問 # 42
What are two components of a WAN connection? (Choose two.)
- A. router
- B. CSU/DSU
- C. switch
- D. bridge
- E. hub
正解：A、B
解説：
Section: General Networking Knowledge
質問 # 43
Which command sends an echo request packet to the target host and then waits for an echo response message?
- A. connect
- B. echo
- C. access
- D. ping
正解：D
質問 # 44
How many pairs of copper wire does a UTP cable have?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
Section: Cisco Equipment and Related Hardware
質問 # 45
Which type of memory stores the decompressed form of Cisco IOS Software and the running configuration?
- A. ROM
- B. flash
- C. DRAM
- D. NVRAM
正解：C
解説：
The decompressed form of Cisco IOS Software and the running configuration are stored in DRAM (Dynamic Random-Access Memory) on Cisco devices. DRAM is used as the main memory for the device, where the operating system runs and the running configuration is stored. When a Cisco device boots up, the IOS image is decompressed and loaded into DRAM, and the running configuration is also held in this memory type. It's important to note that DRAM is volatile memory, which means its contents are lost when the device is powered off or restarted12. Reference := Maintaining System Memory Configuration Guide, Cisco IOS Release 15M&T - Cisco, Types of memory on a Cisco device - Study-CCNA
質問 # 46
Which command displays information about the carrier network, cell site, and available service?
- A. show cellular unit radio
- B. show cellular unit hardware
- C. show cellular unit profile
- D. show cellular unit network
正解：D
解説：
The show cellular unit network command in Cisco IOS is used to view detailed information about the cellular modem and the network it's connected to. Here's the type of information this command usually displays:
Network Status: Whether the device is registered on the cellular network.
Carrier Information: The name of the cellular network provider.
Technology: The cellular technology in use (e.g., 3G, 4G/LTE).
Signal Strength: Signal strength indicators like RSSI and RSCP.
Cell Site Information: Data about the cell tower or base station the device is connected to.
IP Address: The IP address assigned to the cellular interface.
Why other options are less likely:
show cellular unit radio: Provides information about the radio module itself, such as its state and power levels.
show cellular unit hardware: Focuses on hardware-level information of the cellular unit.
show cellular unit profile: Displays configuration details of the cellular profile used to connect to the network.
Reference:
Cisco command documentation for different show cellular options: https://www.cisco.com/c/en/us/td/docs/routers/wireless-wan/Cisco-Catalyst-Cellular-Gateways/cisco-cellular-gateways-command-reference-guide/m-show_commands.pdf
質問 # 47
What is the fastest way to recover a software version that supports a USB flash port on a Cisco device?
- A. xmodem transfer command
- B. copy tftp flash: command
- C. copy command with USB memory
- D. tftp command
正解：C
解説：
The fastest way to recover a software version on a Cisco device that supports a USB flash port is by using the copy command with USB memory. This method allows for the direct transfer of the Cisco IOS image from a USB flash drive to the device's memory. It is significantly faster than using TFTP or Xmodem, which are slower due to network speed limitations and the inherent slowness of the Xmodem protocol, respectively. By using a USB flash drive, you can bypass these limitations and achieve a quicker recovery process
質問 # 48
Which type of port on a laptop is used to connect to an Ethernet port on a Cisco switch?
- A. DVI
- B. DB-9
- C. RJ-11
- D. RJ-45
正解：D
解説：
RJ-45 is the standard connector used for Ethernet networks. Here's why it's the correct answer:
Compatibility: Ethernet ports on both laptops and Cisco switches use RJ-45 connectors. This makes RJ-45 cables ideal for direct connections between these devices.
Appearance: RJ-45 ports are rectangular and slightly larger than typical phone jacks (RJ-11). They have eight metal pins inside.
Why other options are incorrect:
DVI: DVI ports are used for video connections between computers and displays.
RJ-11: RJ-11 ports are primarily associated with analog phone lines and are smaller than RJ-45.
DB-9: DB-9 connectors were traditionally used for serial connections on older computers and peripherals.
質問 # 49
Which type of transceiver module is used for 40 Gigabit Ethernet connectivity?
- A. SFP+
- B. QSFP+
- C. GBIC
- D. XFP
正解：B
解説：
Section: Cisco Equipment and Related Hardware
Explanation/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 # 50
Which type of port on a laptop is used to connect to an Ethernet port on a Cisco switch?
- A. DVI
- B. DB-9
- C. RJ-11
- D. RJ-45
正解：D
質問 # 51
An Ethernet interface is up and the line protocol is down. What are two possible causes? (Choose two.)
- A. There is a Layer 2 mismatch in the encapsulation type.
- B. The Ethernet cable might not be attached properly.
- C. The Ethernet interface has been manually disabled.
- D. Keepalives are not being received by the local device.
- E. There is a speed or duplex mismatch with the remote device.
正解：A、E
解説：
Section: Service-related Knowledge
質問 # 52
Which command sends an echo request packet to the target host and then waits for an echo response message?
- A. connect
- B. echo
- C. access
- D. ping
正解：D
解説：
Section: Cisco IOS Software Operation
質問 # 53
Which type of memory stores the configuration of a router or switch by default?
- A. ROM
- B. flash
- C. NVRAM
- D. RAM
正解：D
質問 # 54
Which Cisco CPAK 100GBASE module supports Multimode Fiber cable?
- A. Cisco CPAK-100G-ER4L
- B. Cisco CPAK-100G-SR4
- C. Cisco CPAK-100G-CWDM4
- D. Cisco CPAK-100G-LR4
正解：B
解説：
Reference:
https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/ data_sheet_c78-728110.html
質問 # 55
What are two components of a WAN connection? (Choose two.)
- A. router
- B. CSU/DSU
- C. switch
- D. bridge
- E. hub
正解：A、B
質問 # 56
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