BEST Verified Cisco 100-490 Exam Questions (2024)
The Best Practice Test Preparation for the 100-490 Certification Exam
Cisco 100-490 exam is an important certification for IT professionals who are looking to advance their career in the field of network engineering. Supporting Cisco Routing and Switching Network Devices certification validates the candidates' knowledge and skills in supporting Cisco routing and switching network devices, which are essential for any organization that relies on a network infrastructure. Supporting Cisco Routing and Switching Network Devices certification also demonstrates the candidates' commitment to continuous learning and professional development.
NEW QUESTION # 21
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 Content Engine
- B. modem
- C. CSU/DSU
- D. Cisco router
Answer: D
Explanation:
Cisco routers can be readily configured to act as TFTP servers, allowing them to provide Cisco IOS images or configuration files to other devices. Here's why this is the correct answer:
Software Support: Cisco IOS includes built-in support for the TFTP protocol, making it easy to set up a TFTP server on a router.
Storage Capacity: Routers typically have flash memory where IOS images and other files can be stored, making them suitable repositories for TFTP transfers.
Network Accessibility: Routers play a central role in networks, making them an accessible location for TFTP file transfers.
Why other options are incorrect:
Cisco Content Engine: Content Engines are specialized network appliances designed for caching and accelerating web content delivery. They typically don't have functionality for acting as generic TFTP servers.
Modem: Modems primarily modulate/demodulate signals to facilitate communication over traditional telephone lines. They lack the software capabilities to run a TFTP server.
CSU/DSU: Channel Service Unit/Data Service Units are devices used to interface with digital leased lines. They don't possess the necessary software to run a TFTP server.
NEW QUESTION # 22
Which router port is used for dial-in access to the router for CLI management purposes and does not usually pass normal network traffic?
- A. Fast Ethernet
- B. channelized serial
- C. AUX
- D. Gigabit Ethernet
Answer: C
NEW QUESTION # 23
What is the line speed of a DS0 in North America?
- A. 16 kbps
- B. 64 kbps
- C. 32 kbps
- D. 128 kbps
Answer: B
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 24
Which two commands set the configuration register value? (Choose two.)
- A. router(config)#configuration-register 0x2102
- B. rommon>config-register 0x2102
- C. rommon>confreg 0x2102
- D. router(config)#config-register 0x2102
- E. router(config)#confreg 0x2102
Answer: C,D
Explanation:
Section: Cisco IOS Software Operation
NEW QUESTION # 25
Which two pairs of LAN Ethernet devices use an RJ-45 straight-through cable? (Choose two.)
- A. switch-to-hub
- B. switch-to-server
- C. switch-to-switch
- D. router-to-router
- E. switch-to-router
Answer: B,E
NEW QUESTION # 26
Which command displays information about the carrier network, cell site, and available service?
- A. show cellular unit profile
- B. show cellular unit radio
- C. show cellular unit hardware
- D. show cellular unit network
Answer: D
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/solutions/Verticals/EE/IG-WAN/EE-WAN-IG/EE-WAN- IGch2.html
NEW QUESTION # 27
Which type of memory is used to permanently store Cisco IOS Software?
- A. flash
- B. NVRAM
- C. SRAM
- D. DRAM
Answer: B
Explanation:
Section: Cisco IOS Software Operation
NEW QUESTION # 28
Which type of memory stores the configuration of a router or switch by default?
- A. flash
- B. NVRAM
- C. ROM
- D. RAM
Answer: D
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 29
Which two commands identify the serial number of a Cisco router? (Choose two.)
- A. show inventory
- B. show run
- C. show version
- D. show environment
- E. show archive
Answer: A,C
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 30
Which command displays information about the carrier network, cell site, and available service?
- A. show cellular unit profile
- B. show cellular unit radio
- C. show cellular unit hardware
- D. show cellular unit network
Answer: D
Explanation:
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
NEW QUESTION # 31
What does Cisco use for Return Materials Authorization tracking of field-replaceable parts?
- A. product number
- B. RMA number
- C. FRU number
- D. serial number
Answer: B
Explanation:
Section: Service-related Knowledge
NEW QUESTION # 32
Which two commands set the configuration register value? (Choose two.)
- A. router(config)#configuration-register 0x2102
- B. rommon>config-register 0x2102
- C. rommon>confreg 0x2102
- D. router(config)#config-register 0x2102
- E. router(config)#confreg 0x2102
Answer: C,D
Explanation:
The configuration register on Cisco routers and switches controls specific bootup behaviors. Here's how to modify it:
1. In ROMmon Mode:
rommon>confreg 0x2102 : This command is used when the device is in ROMmon mode (a basic operating system loaded when the full Cisco IOS cannot be found). ROMmon offers limited functionality and is often used for troubleshooting or password recovery.
2. In Global Configuration Mode:
router(config)#config-register 0x2102 : This command is used from within the Cisco IOS itself when you have normal access to the router. You would enter privileged EXEC mode and then global configuration mode to use it.
Importance of Configuration Register Settings:
The most common reasons to modify the configuration register are:
Password Recovery: Setting the configuration register to 0x2142 tells the router to ignore the startup configuration (stored in NVRAM), allowing you to bypass password protection.
Changing Boot Behavior: Settings can control the boot sequence, such as specifying where the Cisco IOS image should be loaded from.
Reference:
Cisco Configuration Register: https://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/50421-config-register-use.html Understanding the Configuration Register (Cisco): https://networklessons.com/cisco/ccna-routing-switching-icnd1-100-105/configuration-register-cisco-ios
NEW QUESTION # 33
Which Xmodem option enhances error checking of an image copied to flash memory?
- A. -c
- B. -x
- C. -e
- D. -r
Answer: C
Explanation:
The Xmodem option that enhances error checking when copying an image to flash memory is the -e option. This option enables error checking to ensure the integrity of the file being transferred. Xmodem is a protocol that uses checksums or cyclic redundancy checks (CRC) to detect errors during the transfer. The -e option specifically invokes CRC error checking, which is more reliable than the basic checksum method, providing an additional layer of verification that the copied image is free from errors. Reference := The information is based on standard practices for using the Xmodem protocol for file transfers in networking devices, as outlined in Cisco's documentation and support forums1.
NEW QUESTION # 34
Which command displays the configuration register setting?
- A. show config-register
- B. show flash
- C. show version
- D. show running-config
Answer: C
Explanation:
Section: Cisco IOS Software Operation
NEW QUESTION # 35
The colored wires at one end of a cable are in reverse sequence to the colored wires at the other end of the cable. Which cable does this configuration describe?
- A. straight-through
- B. crossover
- C. rolled
- D. coaxial
Answer: B
NEW QUESTION # 36
What is the default operating mode when you initially log in to a router?
- A. privileged EXEC
- B. ROM monitor
- C. global configuration
- D. user EXEC
Answer: D
Explanation:
When you initially log in to a Cisco router, the default operating mode is user EXEC mode. This mode provides a limited set of basic monitoring commands but does not allow for any configuration changes to the router's settings. To make configuration changes, you must enter privileged EXEC mode (often accessed by the enable command), which offers a wider range of commands that allow for the viewing and modification of the configurationGlobal configuration mode is accessed from privileged EXEC mode to modify the router's configuration, and ROM monitor mode is a low-level mode used mainly for recovery purposes1.
NEW QUESTION # 37
Which two features are associated with single-mode fiber-optic cable? (Choose two.)
- A. carries a higher bandwidth that multimode fiber
- B. operates over less distance than multimode fiber
- C. costs less than multimode fiber
- D. has higher attenuation that multimode fiber
- E. consists of a single strand of glass fiber
Answer: A,E
Explanation:
The features associated with single-mode fiber-optic cable include:
Consists of a single strand of glass fiber: Single-mode fiber uses a single core (strand) of glass fiber to transmit light signals. This core is thinner than that of multimode fiber, allowing for greater transmission distances.
Carries a higher bandwidth than multimode fiber: Single-mode fiber can carry higher data rates over longer distances compared to multimode fiber. It is commonly used in long-haul communication links and high-speed networks.
Reference:
Single-mode vs. Multimode Fiber
Fiber Optic Cable Types
NEW QUESTION # 38
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Cisco 100-490 exam, also known as Supporting Cisco Routing and Switching Network Devices, is designed for network professionals who want to validate their skills and knowledge in supporting Cisco routing and switching technologies. 100-490 exam tests the candidate's understanding of network fundamentals, routing technologies, LAN switching technologies, infrastructure services, and infrastructure maintenance. Passing 100-490 exam provides the candidates with the Cisco Certified Technician Routing and Switching certification, which is a valuable credential for entry-level network technicians.
Cisco 100-490 exam is an important step in the career of a networking professional. It covers a wide range of topics related to routing and switching devices, such as network protocols, LAN switching technologies, and WAN technologies. Candidates who pass the exam will demonstrate their abilities to troubleshoot and maintain Cisco networking systems, which will be valuable in their professional careers.
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