Pass Your Exam With 100% Verified 100-490 Exam Questions
100-490 Dumps PDF - 100-490 Real Exam Questions Answers
To succeed in the Cisco 100-490 certification exam, candidates need to have a strong foundation in networking concepts and technologies. They should also have hands-on experience in configuring and troubleshooting Cisco routing and switching devices. Candidates can prepare for the exam by taking Cisco-approved courses, studying the official exam guide, and practicing with hands-on labs and simulations.
Cisco 100-490 exam is a 90-minute exam that consists of about 60-70 questions. 100-490 exam is available in English and Japanese and can be taken at any Pearson VUE testing center. 100-490 exam is computer-based and requires candidates to demonstrate their knowledge and skills through multiple-choice questions, drag-and-drop questions, and simulation questions.
NEW QUESTION # 43
At the interface configuration prompt, which command returns you to the main configuration prompt?
- A. end
- B. quit
- C. exit
- D. clear
Answer: C
Explanation:
Section: Cisco IOS Software Operation
NEW QUESTION # 44
Which two statements about Telnet and SSH are true? (Choose two.)
- A. SSH is a protocol that provides a secure remote access connection to network devices.
- B. Telnet is preferred over SSH for security reasons.
- C. Telnet is a protocol that provides a secure remote access connection to network devices.
- D. A Telnet network management connection is dropped when a router reboots.
- E. SSH uses the well-known TCP port 23 for its communication.
Answer: A,D
NEW QUESTION # 45
An Ethernet interface is up and the line protocol is down. What are two possible causes? (Choose two.)
- A. There is a speed or duplex mismatch with the remote device.
- B. The Ethernet cable might not be attached properly.
- C. There is a Layer 2 mismatch in the encapsulation type.
- D. The Ethernet interface has been manually disabled.
- E. Keepalives are not being received by the local device.
Answer: A,C
Explanation:
While the initial answers focused on the most common causes, here's why the other options could also contribute to an interface being stuck in the "up/down" state:
A . Speed or Duplex Mismatch: Devices on either end of an Ethernet connection need to use compatible speed (e.g., 100 Mbps, 1 Gbps) and duplex (full-duplex or half-duplex) settings. Mismatches can prevent the line protocol from coming up even if the physical link is established.
B . Layer 2 Mismatch in Encapsulation Type: Some protocols used on Ethernet networks, like ISL and 802.1Q, have specific encapsulation requirements. If devices on each end aren't using the same encapsulation type, the line protocol will likely remain down.
C . The Ethernet Interface Has Been Manually Disabled: Correct! Administrators can put an interface in a shutdown state using commands like shutdown. This brings down the line protocol even if the physical connection is good.
D . Keepalives Are Not Being Received by the Local Device: While less likely to be the sole cause, issues with keepalive mechanisms used in some routing protocols could potentially lead to the line protocol going down. If the local device expects keepalives and doesn't receive them, it might assume a connectivity problem and affect the interface status.
E . The Ethernet Cable Might Not Be Attached Properly: While a disconnected or faulty cable would usually make the interface down/down, it's possible in some scenarios for a partially connected or damaged cable to result in a link being detected (Layer 1 up) but with errors preventing the line protocol (Layer 2) from initializing.
Troubleshooting network issues often involves considering multiple factors and testing different possibilities. The "up/down" status gives important clues but might have several potential root causes.
NEW QUESTION # 46
Which type of memory is erased on a Cisco device when rebooted?
- A. flash
- B. NVRAM
- C. DRAM
- D. PVDM
Answer: C
Explanation:
DRAM, or Dynamic Random-Access Memory, is the type of memory that is erased when a Cisco device is rebooted. DRAM is used to store the running configuration and routing tables of the device. Since DRAM is volatile memory, its contents are lost when the device is powered down or restarted. This is in contrast to non-volatile memory types like flash and NVRAM, which retain their contents even after a reboot1. Reference := Types of memory on a Cisco device - Study-CCNA
NEW QUESTION # 47
Which bits represent the boot field in the configuration register value?
- A. highest two bits
- B. highest four bits
- C. lowest two bits
- D. lowest four bits
Answer: D
Explanation:
The configuration register on Cisco devices is a 16-bit value, typically represented in hexadecimal notation (e.g., 0x2102). The lowest four bits (bits 0-3) of this value are designated as the boot field.
The Boot Field's Importance:
The boot field determines how the device will load its operating system (Cisco IOS) during the startup process. Here's a basic breakdown of common boot field values:
0x0: Stay at the ROMmon prompt.
0x1: Boot from ROM (often used for troubleshooting or recovery).
0x2 - 0xF: Load the operating system based on settings in the startup configuration (NVRAM) or from a network server if specified.
Example:
A configuration register value of 0x2102 indicates that the boot field is 0x2 (the last digit). This is a common default setting, instructing the device to load the Cisco IOS image from Flash memory.
Reference:
Cisco Configuration Register Detailed Explanation: [invalid URL removed] Configuration Register Settings (Cisco): https://networklessons.com/cisco/ccna-routing-switching-icnd1-100-105/configuration-register-cisco-ios
NEW QUESTION # 48
What is the Windows-based program that executes the ping command to test network connectivity?
- A. ipconfig
- B. cmd
- C. Find
- D. Start
Answer: B
Explanation:
The cmd program, also known as the Command Prompt, is the primary command-line interface in Windows. It allows you to execute various commands, including the ping command, to perform network testing and troubleshooting.
Here's how to use ping in the Command Prompt:
Open the Command Prompt: Search for 'cmd' in the Windows Start Menu or use the Run dialog (Windows key + R) and type 'cmd'.
Type the ping command: Enter ping followed by a space and then either the IP address or hostname you want to test. For instance: ping 8.8.8.8 or ping www.google.com.
Press Enter: The Command Prompt will send ping requests and display the results.
Why other options are incorrect:
Find: The Find utility in Windows is used to search for files and folders based on their content or attributes.
Start: The Start Menu in Windows provides access to programs, settings, and power options.
ipconfig: The ipconfig command is used to display network configuration information but doesn't directly execute the ping command.
Reference:
Windows Command Prompt (cmd): https://en.wikipedia.org/wiki/Cmd.exe
Ping command: https://en.wikipedia.org/wiki/Ping_(networking_utility)
NEW QUESTION # 49
What are two ways Telnet and SSH function? (Choose two.)
- A. SSH is a protocol that provides a secure remote access connection to network devices.
- B. Telnet is preferred over SSH for security reasons.
- C. Telnet is a protocol that provides a secure remote access connection to network devices.
- D. A Telnet network management connection is dropped when a router reboots.
- E. SSH uses the well-known TCP port 23 for its communication.
Answer: A,D
Explanation:
* A. SSH...secure remote access: This is correct. SSH (Secure Shell) is designed specifically for secure remote access. It utilizes strong encryption to protect data transmissions, including login credentials and commands.
* B. Telnet...secure remote access: This is incorrect. Telnet is inherently insecure as it transmits all data, including sensitive passwords, in cleartext.
* C. SSH uses...TCP port 23: This is incorrect. SSH uses TCP port 22 by default, while Telnet uses TCP port 23.
* D. Telnet preferred...security reasons: This is incorrect. SSH is vastly preferred over Telnet due to its strong security features.
* E. Telnet connection...router reboots: This is correct. Telnet connections are not persistent, so a router reboot disrupts them. This re-enforces their lack of suitability for critical management tasks.
Key Points:
* Security: SSH is the recommended protocol for remote access to network devices due to its strong encryption and authentication mechanisms.
* Persistence: Telnet connections are temporary and get disrupted on events like router reboots.
NEW QUESTION # 50
Which type of memory stores the decompressed form of Cisco IOS Software and the running configuration?
- A. ROM
- B. flash
- C. NVRAM
- D. DRAM
Answer: D
Explanation:
Section: Cisco IOS Software Operation
NEW QUESTION # 51
Which type of memory stores the configuration of a router or switch by default?
- A. ROM
- B. RAM
- C. flash
- D. NVRAM
Answer: B
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 52
From a Windows command prompt, which command displays the local IP address of a computer?
- A. ipconfiguration
- B. ipconfig
- C. ip configuration
- D. ip config
Answer: B
Explanation:
Section: Service-related Knowledge
NEW QUESTION # 53
Which two pairs of LAN Ethernet devices use an RJ-45 straight-through cable? (Choose two.)
- A. router-to-router
- B. switch-to-switch
- C. switch-to-router
- D. switch-to-server
- E. switch-to-hub
Answer: C,D
Explanation:
Questions no : 12 Verified answer: = B. switch-to-router, E. switch-to-server Switch-to-Router: A switch connects devices within a network by using MAC addresses to forward data to the correct destination. A router, on the other hand, connects multiple networks and uses IP addresses to determine the best path for the data packets. Connecting a switch to a router requires a straight-through cable because they are different types of devices12.
Switch-to-Server: Servers are the powerful computers that provide resources, data, services, or programs to the client machines in the network. When connecting a switch to a server, a straight-through cable is used because the switch and the server are different types of devices with different functions within the network12.
NEW QUESTION # 54
What are two standard fiber-optic connectors? (Choose two.)
- A. multidimension
- B. crossover
- C. Lucent
- D. subscriber
- E. rollover
Answer: C,D
Explanation:
Two standard fiber-optic connectors are Lucent Connectors (LC) and Subscriber Connectors (SC). The Lucent Connector, commonly referred to as LC, was developed by Lucent Technologies and is characterized by its small form factor with a 1.25mm ferrule. It is widely used in high-density applications due to its compact size and square shape1. The Subscriber Connector, or SC, is known for its push-pull latching mechanism and uses a 2.5mm ferrule. It is a square-shaped, duplex connector that has been a dominant fiber optic connector for decades due to its performance and reliability12.
NEW QUESTION # 55
Which type of transceiver module is used for 40 Gigabit Ethernet connectivity?
- A. QSFP+
- B. XFP
- C. SFP+
- D. GBIC
Answer: A
Explanation:
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
NEW QUESTION # 56
Which type of memory is used to store Cisco IOS Software permanently?
- A. SRAM
- B. DRAM
- C. NVRAM
- D. flash
Answer: D
Explanation:
The type of memory used to store Cisco IOS Software permanently is flash memory. Flash memory is non-volatile, meaning it retains its content even after the device is powered down or restarted. It is commonly used in Cisco devices to store one or more Cisco IOS software images, as well as other files such as backup configuration files. This allows the device to reload the operating system after a reboot without the need to retransfer the IOS image
NEW QUESTION # 57
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. Gigabit Ethernet
- B. channelized serial
- C. Fast Ethernet
- D. AUX
Answer: D
Explanation:
The AUX (Auxiliary) port on a router is used for dial-in access for CLI (Command Line Interface) management purposes. It is typically connected to a modem and allows an administrator to dial into the router's CLI for remote management. This port is not used for passing normal network traffic, which differentiates it from other ports like Fast Ethernet or Gigabit Ethernet that handle regular data flow. The AUX port is specifically designed as a backup async port for management access1.
NEW QUESTION # 58
What does Cisco use for Return Materials Authorization tracking of field-replaceable parts?
- A. serial number
- B. RMA number
- C. product number
- D. FRU number
Answer: B
Explanation:
RMA (Return Materials Authorization) is a tracking number that is assigned to a product that is being returned to the manufacturer for repair or replacement. The RMA number allows the manufacturer to track the progress of the return and ensure that the product is returned to the correct customer.
NEW QUESTION # 59
......
100-490 Dumps 100 Pass Guarantee With Latest Demo: https://www.testkingfree.com/Cisco/100-490-practice-exam-dumps.html
Prepare 100-490 Question Answers Free Update With 100% Exam Passing Guarantee [2024]: https://drive.google.com/open?id=15E4e2ZveWsg9KFh6zP1wJK0jC1xlgb-l