At ValidExamDumps, we consistently monitor updates to the Cisco 100-490 exam questions by Cisco. Whenever our team identifies changes in the exam questions,exam objectives, exam focus areas or in exam requirements, We immediately update our exam questions for both PDF and online practice exams. This commitment ensures our customers always have access to the most current and accurate questions. By preparing with these actual questions, our customers can successfully pass the Cisco Supporting Cisco Routing & Switching Network Devices exam on their first attempt without needing additional materials or study guides.
Other certification materials providers often include outdated or removed questions by Cisco in their Cisco 100-490 exam. These outdated questions lead to customers failing their Cisco Supporting Cisco Routing & Switching Network Devices exam. In contrast, we ensure our questions bank includes only precise and up-to-date questions, guaranteeing their presence in your actual exam. Our main priority is your success in the Cisco 100-490 exam, not profiting from selling obsolete exam questions in PDF or Online Practice Test.
Which two Cisco Nexus 3400 Series switches support 400-Gbps Ethernet ports? (Choose two.)
Which two commands set the configuration register value? (Choose two.)
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.
Which router port is used for dial-in access to the router for CLI management purposes and does not usually pass normal network traffic?
Which command sends an echo request packet to the target host and then waits for an echo response message?
The ping command is specifically designed to test network connectivity and reachability. Here's how it works:
Echo Request: The ping command sends an ICMP (Internet Control Message Protocol) Echo Request packet to a specified destination IP address or hostname.
Echo Response: If the target host is reachable, it will respond with an ICMP Echo Reply packet.
Analysis: The ping command measures the round-trip time (RTT) between the source and destination. It also reports statistics like packet loss and response times.
Why other options are incorrect:
echo: In some command-line environments, the echo command is used to display text on the screen and does not relate to network testing.
access: This is a general term and does not refer to a specific command for sending echo requests.
connect: Some tools use the connect command to establish a TCP connection to a remote host, but it doesn't directly utilize ICMP echo packets like the ping command.
ping (Wikipedia): https://en.wikipedia.org/wiki/Ping_(networking_utility)
What is the correct IPv6 address notation?
The correct IPv6 address notation follows the format of eight groups of four hexadecimal digits, separated by colons. The address must have exactly eight groups unless it uses the double colon (::) to represent consecutive groups of zero value. The double colon can only appear once in an address to avoid ambiguity.
Option A is incorrect because it includes a subnet mask (/128) which is not part of the actual address notation. Option B is incomplete as it does not contain enough groups and ends with a single colon. Option C has too many groups (nine instead of eight) and is therefore not a valid IPv6 address. Option D is the correct notation with eight groups of four hexadecimal digits, where necessary leading zeros are included.
