Real Cisco 100-490 Exam Questions [Updated 2024]
100-490 Exam Dumps Pass with Updated 2024 Supporting Cisco Routing and Switching Network Devices
Earning the Cisco 100-490 certification is an excellent way for IT professionals to demonstrate their expertise in supporting Cisco network devices. Supporting Cisco Routing and Switching Network Devices certification is recognized globally and is highly valued by employers in the IT industry. By earning this certification, candidates can enhance their career prospects and open up new opportunities for professional growth and development.
Cisco 100-490 exam consists of 60-70 questions and lasts for 90 minutes. 100-490 exam questions are in multiple-choice and drag-and-drop formats, and the passing score is 825 out of 1000 points. 100-490 exam content is focused on the implementation and support of Cisco routing and switching technologies, including Cisco routers, switches, and basic wireless technologies. 100-490 exam also covers troubleshooting and maintenance of Cisco network devices, including network security and infrastructure services. Overall, the Cisco 100-490 exam is an essential step for network technicians who want to advance their careers in supporting Cisco routing and switching technologies.
NEW QUESTION # 12
Which two pieces of information are displayed when you use the show ip interface brief command? (Choose two.)
- A. Layer 3 address
- B. Layer 2 address
- C. interface status
- D. encapsulation type
- E. keepalive
Answer: A,C
NEW QUESTION # 13
Which command initiates the copying of a Cisco IOS image to a Cisco device?
- A. copy tftp nvram
- B. copy tftp flash
- C. copy xmodem flash
- D. copy flash tftp
Answer: B
Explanation:
The copy tftp flash command is used to download a Cisco IOS image from a TFTP (Trivial File Transfer Protocol) server and store it in the Flash memory of the Cisco device. Here's the breakdown of the command:
copy: Indicates a file transfer operation.
tftp: Specifies the use of the TFTP protocol.
flash: Specifies the destination as the flash memory of the Cisco device.
Why other options are incorrect:
copy tftp nvram: This would attempt to copy a file from a TFTP server to the NVRAM of the device. NVRAM is typically not the desired location for storing IOS images.
copy flash tftp: This command would copy a file from the local flash memory to a TFTP server (uploading).
copy xmodem flash: This would use the XMODEM protocol for the transfer, which is slower and less reliable than TFTP for Cisco IOS images.
https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol
NEW QUESTION # 14
What is the line speed of a DS0 in North America?
- A. 64 kbps
- B. 32 kbps
- C. 16 kbps
- D. 128 kbps
Answer: A
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 15
Which type of physical connector does a Gigabit Ethernet port typically use?
- A. RJ-9
- B. RJ-11
- C. DB-25
- D. RJ-45
Answer: D
Explanation:
The typical physical connector used for a Gigabit Ethernet port is an RJ-45. This connector is standard for network cabling and provides the necessary performance for Gigabit Ethernet, which is also known as 1000BASE-T. RJ-45 connectors are used because they can support higher data rates compared to other connectors like RJ-11 or RJ-9, which are commonly used for telephone connections, and DB-25, which is an older serial port connector not suitable for high-speed Ethernet connections1.
Reference :=
2: Ethernet Alliance - The Physical Layer of Ethernet 3: Altium - Gigabit Ethernet 101: Basics to Implementation 1: Ascent Optics - All You Need to Know About RJ45 Cables: Connectors, Interfaces, and... 4: Hardware Secrets - Gigabit Ethernet and How it works (a 2022 Guide)
NEW QUESTION # 16
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
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 17
Which two ports on a laptop are used to gain console access to a Cisco switch? (Choose two.)
- A. RJ-11
- B. USB
- C. RJ-45 Ethernet
- D. DVI
- E. DB-9
Answer: B,E
NEW QUESTION # 18
What are two purposes of a USB thumb drive? (Choose two.)
- A. to copy IOS images to and from a PC
- B. to save router hardware information
- C. to increase system memory size
- D. to copy configuration files to and from a PC
- E. to save the system log
Answer: A,D
Explanation:
Section: Service-related Knowledge
NEW QUESTION # 19
Which bits represent the boot field in the configuration register value?
- A. highest two bits
- B. lowest two bits
- C. lowest four bits
- D. highest four bits
Answer: C
NEW QUESTION # 20
Which command returns the user to the main configuration prompt from the interface configuration prompt?
- A. clear
- B. exit
- C. quit
- D. end
Answer: B
Explanation:
The command that returns the user to the main configuration prompt from the interface configuration prompt is exit. When you are in interface configuration mode on a Cisco device and you want to return to the global configuration mode, you use the exit command. If you want to go all the way back to privileged EXEC mode, you would use the end command or press Ctrl-Z1.
NEW QUESTION # 21
Which Xmodem option is used to enhance error checking of an image that is copied to flash memory?
- A. -r
- B. -c
- C. -x
- D. -e
Answer: B
Explanation:
The -c option in Xmodem file transfers is used to enable CRC (Cyclic Redundancy Check) for enhanced error checking. Here's why it's the correct answer:
Error Detection: CRC is a more robust error detection mechanism compared to the standard checksum method used in Xmodem. It provides greater reliability in identifying file corruption during the transfer.
Flash Memory: Since flash memory on a Cisco router or switch stores critical data like configuration files or the IOS image, ensuring the integrity of transferred files is crucial.
Why other options are incorrect:
-e, -r, -x: These are not standard Xmodem options for error checking purposes. While some implementations may have custom flags, they are not universally applicable.
Important Note: Xmodem is a legacy protocol that is often replaced by more reliable options like TFTP in modern Cisco devices. However, understanding Xmodem options is still relevant for certain cases or older equipment.
Reference:
Xmodem overview: https://en.wikipedia.org/wiki/XMODEM
Cyclic Redundancy Check (CRC): https://en.wikipedia.org/wiki/Cyclic_redundancy_check
NEW QUESTION # 22
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
NEW QUESTION # 23
Which Xmodem option enhances error checking of an image copied to flash memory?
- A. -r
- B. -e
- C. -x
- D. -c
Answer: B
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 # 24
Which two pairs of LAN Ethernet devices use an RJ-45 straight-through cable? (Choose two.)
- A. switch-to-switch
- B. switch-to-server
- C. switch-to-hub
- D. switch-to-router
- E. router-to-router
Answer: B,D
NEW QUESTION # 25
Which two statements about a SmartJack are true? (Choose two.)
- A. It provides signal conversion.
- B. It regenerates the signal to compensate for signal degradation from line transmission.
- C. It acts as a concentration point for dial-in and dial-out connections.
- D. It provides channel testing.
- E. It operates at Layer 2 of the OSI model.
Answer: A,B
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 26
Which two commands are valid for copying a saved configuration to RAM? (Choose two.)
- A. copy running-config startup-config
- B. copy running-config tftp
- C. copy tftp startup-config
- D. copy startup-config running-config
- E. copy tftp running-config
Answer: D,E
Explanation:
The commands to copy a saved configuration to RAM on Cisco devices are:
copy startup-config running-config: This command is used to copy the startup configuration (saved configuration) into the running configuration (current configuration in RAM). It is typically used when you want to restore the device to a previously saved configuration after changes have been made1.
copy tftp running-config: This command allows you to copy a configuration file from a TFTP server directly into the running configuration of the device. It's useful for applying a new configuration or for restoring a configuration from a backup located on a TFTP server1.
The other options listed are not valid for copying a saved configuration to RAM:
copy running-config startup-config copies the current running configuration to the startup configuration, which is the opposite of what's asked.
copy running-config tftp is used to save the running configuration to a TFTP server, not to copy to RAM.
copy tftp startup-config would copy a file from a TFTP server to the startup configuration, not to the running configuration in RAM.
NEW QUESTION # 27
Which address facilitates the routing of packets over an IP network?
- A. network
- B. physical
- C. transport
- D. MAC
Answer: A
Explanation:
The address that facilitates the routing of packets over an IP network is the network address. In the context of IP networking, this refers to the IP address, which is used to identify each host on a network and to determine the best path for data packets to travel from their source to their destination. Routers use IP addresses to make decisions about where to forward packets so that they reach the correct destination. The network layer of the OSI model, where IP operates, is responsible for this routing process123.
The other options listed do not facilitate routing in the same way:
Physical (A) and MAC (D) addresses are used at the data link layer to deliver packets on the same local network.
Transport (B) refers to the transport layer, which is responsible for end-to-end communication and data flow control but does not route packets over an IP network.
NEW QUESTION # 28
Which two Cisco Nexus 3400 Series switches support 400-Gbps Ethernet ports? (Choose two.)
- A. Cisco Nexus 34200YC-SM
- B. Cisco Nexus 3432D-S
- C. Cisco Nexus 34180YC
- D. Cisco Nexus 3464C
- E. Cisco Nexus 3408-S
Answer: B,E
Explanation:
The Cisco Nexus 3432D-S and Cisco Nexus 3408-S are part of the Cisco Nexus 3400 Series switches that support 400-Gbps Ethernet ports. The Cisco Nexus 3432D-S is designed with 32 ports of 400G, providing high-density and high-throughput capabilities1. The Cisco Nexus 3408-S offers flexibility with 100G or 400G Line-Card Expansion Modules (LEMs), allowing for configurations with 32 ports of 400G2. These switches are engineered for data centers requiring high performance, low latency, and power efficiency, with the Cisco Nexus 3432D-S offering industry-leading performance-per-watt power efficiency at low latency1.
NEW QUESTION # 29
Which type of custom scripting has Cisco NX-OS added to help manage user networks?
- A. Python
- B. Collective
- C. SQL
- D. C++
Answer: A
Explanation:
Cisco NX-OS has added support for Python scripting to help manage user networks. Python is a powerful and versatile scripting language that is widely used for automation tasks, including network management. Cisco NX-OS leverages Python to enable network administrators to write custom scripts and programs that can interact with the network operating system, automate repetitive tasks, and integrate with other systems and APIs. This support for Python scripting is part of Cisco's commitment to network programmability and automation, allowing for more efficient and flexible network operations12.
NEW QUESTION # 30
Which type of memory is used to permanently store Cisco IOS Software?
- A. NVRAM
- B. SRAM
- C. flash
- D. DRAM
Answer: A
NEW QUESTION # 31
Which two ports on a laptop are used to gain console access to a Cisco switch? (Choose two.)
- A. RJ-11
- B. USB
- C. RJ-45 Ethernet
- D. DVI
- E. DB-9
Answer: B,E
Explanation:
To gain console access to a Cisco switch, two types of ports on a laptop can be used: DB-9 and USB. The DB-9 port is a traditional serial port that is often used with a DB-9 to RJ-45 console cable to connect to the switch's console port1. However, as modern laptops may not have a DB-9 port, a USB to Serial adapter can be used instead, which creates a virtual COM port that can be used to connect to the switch1. The USB port can also be used directly if the switch has a USB console port, which is common on newer Cisco devices. These ports allow for direct physical connection to the switch for configuration and management purposes. Reference := Access the CLI via PuTTY using a Console Connection on 300 and 500 Series Managed Switches - Cisco, How to connect Switch with console port - Cisco Learning Network
NEW QUESTION # 32
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:
Section: Cisco IOS Software Operation
NEW QUESTION # 33
Which type of memory stores the configuration of a router or switch by default?
- A. NVRAM
- B. flash
- C. ROM
- D. RAM
Answer: D
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 34
From the enable mode, which command loads the configuration during the password recovery process on a Cisco router?
- A. copy running-config startup-config
- B. load_helper
- C. configure terminal
- D. copy startup-config running-config
Answer: D
Explanation:
The copy startup-config running-config command is used during the password recovery process on a Cisco router to load the saved configuration into the device's active running configuration. Here's why this is the correct choice:
Password Recovery Context: Password recovery often involves booting into ROMmon mode and changing the configuration register to bypass the normal boot process. This leaves the device with a blank running configuration.
Restoring Configuration: The copy startup-config running-config command copies the stored configuration (startup-config) from NVRAM into the running-config, which is used by the router for its operations.
Why other options are incorrect:
load_helper: While the load_helper command sometimes appears in password recovery procedures, it's typically used for older models and may not be necessary for all Cisco routers.
configure terminal: This command simply enters global configuration mode. It doesn't directly load a configuration.
copy running-config startup-config: This command saves the active running configuration into NVRAM as the startup-config. It's the reverse of what you need for password recovery.
NEW QUESTION # 35
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