Dec 14, 2024 100-490 Exam Crack Test Engine Dumps Training With 74 Questions
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NEW QUESTION # 31
ESD is the sudden and momentary electric current that flows between two objects at different electrical potentials, caused by direct contact or induced by an electrostatic field. Which three tools are used to avoid ESD? (Choose three.)
- A. antistatic mat
- B. antistatic bag
- C. negative static bag
- D. ESD wrist strap
- E. latex gloves
- F. negative static mat
Answer: A,B,D
NEW QUESTION # 32
Which two Cisco Nexus 3400 Series switches support 400-Gbps Ethernet ports? (Choose two.)
- A. Cisco Nexus 34180YC
- B. Cisco Nexus 34200YC-SM
- C. Cisco Nexus 3464C
- D. Cisco Nexus 3408-S
- E. Cisco Nexus 3432D-S
Answer: D,E
Explanation:
Section: Cisco Equipment and Related Hardware
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3400s/sw/922/interfaces/ configuration/guide/b_Cisco_Nexus_3400_NX-OS_Interfaces_Configuration_Guide_922/ b_Cisco_Nexus_3400_NX-OS_Interfaces_Configuration_Guide_9z_chapter_010.html
NEW QUESTION # 33
Which two commands identify the serial number of a Cisco router? (Choose two.)
- A. show archive
- B. show version
- C. show environment
- D. show inventory
- E. show run
Answer: B,D
Explanation:
The commands that can be used to identify the serial number of a Cisco router are show inventory and show version. The show inventory command provides detailed information about the hardware inventory, including the serial numbers of the device and its components1. The show version command displays the router's configuration, including the version of the operating system, the last reboot reason, and the hardware serial number, which is listed as the "Processor board ID" in the command output2. These commands are essential for network administrators to document and manage network equipment.
NEW QUESTION # 34
What are two ways Telnet and SSH function? (Choose two.)
- A. A Telnet network management connection is dropped when a router reboots.
- 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. SSH is a protocol that provides a secure remote access connection to network devices.
- 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 # 35
Which command displays information about the carrier network, cell site, and available service?
- A. show cellular unit network
- B. show cellular unit radio
- C. show cellular unit profile
- D. show cellular unit hardware
Answer: A
Explanation:
Section: Cisco IOS Software Operation
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 # 36
Which command provides detailed information about the components that are installed on a router, such as the model, PID, and serial number?
- A. show router
- B. show items
- C. show inventory
- D. show chassis
Answer: C
Explanation:
Section: Cisco IOS Software Operation
NEW QUESTION # 37
Which command displays a list of file systems that are available on Cisco devices?
- A. show memory
- B. show version
- C. show directory
- D. show file system
Answer: D
NEW QUESTION # 38
Which type of physical connector does a Gigabit Ethernet port typically use?
- A. RJ-9
- B. RJ-11
- C. RJ-45
- D. DB-25
Answer: C
NEW QUESTION # 39
Which two pieces of information are displayed when the show ip interface brief command is used? (Choose two.)
- A. interface status
- B. encapsulation type
- C. keepalive
- D. Layer 3 address
- E. Layer 2 address
Answer: A,D
Explanation:
The show ip interface brief command provides a concise summary of the status and IP addressing configuration of interfaces on a Cisco router or switch. Here's what it displays:
Interface: The name of the interface (e.g., FastEthernet0/0, GigabitEthernet1/1).
IP Address: The Layer 3 IP address assigned to the interface (if any).
OK? Indicates the IP layer status of the interface (YES if operational, NO if not).
Method: How the IP address was configured (manual or DHCP).
Status: The Layer 1 status of the interface (up or down).
Protocol: The Layer 2 status of the interface (up or down).
Why other options are incorrect:
Layer 2 address: The show ip interface brief command does not directly display Layer 2 (MAC) addresses. You can use the show interface <interface-name> command for that.
Keepalive: Keepalives are used in some routing protocols but are not generally reflected in the output of the show ip interface brief command.
Encapsulation type: Encapsulation information is also not typically included in the show ip interface brief output.
Reference:
Cisco IOS show ip interface brief command: [invalid URL removed]
Example output of show ip interface brief: https://www.cisco.com/E-Learning/bulk/public/tac/cim/cib/using_cisco_ios_software/cmdrefs/show_ip_interface.
NEW QUESTION # 40
Which command displays the configuration register setting?
- A. show version
- B. show running-config
- C. show flash
- D. show config-register
Answer: A
Explanation:
The show version command on Cisco devices provides a variety of system information, including:
Cisco IOS version: The version of the Cisco IOS software running on the device.
Boot image: The location of the IOS image used during startup.
Hardware information: Model, processor type, memory details.
Interfaces: A list of the device's interfaces.
Configuration register: The current value of the configuration register, typically displayed near the end of the output.
Why other options are incorrect:
show flash: Displays the contents of flash memory, but not the configuration register.
show running-config: Displays the currently active configuration, but the configuration register setting is not directly part of the running configuration.
show config-register: This is not a standard Cisco IOS command.
NEW QUESTION # 41
Which Xmodem option is used to enhance error checking of an image that is copied to flash memory?
- A. -c
- B. -e
- C. -r
- D. -x
Answer: A
Explanation:
Section: Service-related Knowledge
Explanation/Reference:
NEW QUESTION # 42
Which Xmodem option is used to enhance error checking of an image that is copied to flash memory?
- A. -c
- B. -e
- C. -r
- D. -x
Answer: A
NEW QUESTION # 43
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. crossover
- B. coaxial
- C. rolled
- D. straight-through
Answer: A
NEW QUESTION # 44 
Refer to the exhibit. Which two statements about the hardware components are true? (Choose two.)
- A. 2 is a USB 5-pin mini USB Type B to USB Type A console cable.
- B. 3 is a USB 5-pin mini USB Type B port.
- C. 2 is an RJ-45 to USB Type A console cable.
- D. 1 is a USB Type A port.
- E. 3 is a USB Type A port.
Answer: A,E
Explanation:
Section: Cisco Equipment and Related Hardware
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/routers/access/2900/hardware/installation/guide/ Hardware_Installation_Guide/Install_Connect.html
NEW QUESTION # 45
Which two commands identify the serial number of a Cisco router? (Choose two.)
- A. show archive
- B. show version
- C. show environment
- D. show inventory
- E. show run
Answer: B,D
Explanation:
Section: Cisco Equipment and Related Hardware
NEW QUESTION # 46
Which type of memory stores the decompressed form of Cisco IOS Software and the running configuration?
- A. NVRAM
- B. DRAM
- C. ROM
- D. flash
Answer: B
Explanation:
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
NEW QUESTION # 47
Which command provides detailed information about the components that are installed on a router, such as the model, PID, and serial number?
- A. show router
- B. show items
- C. show inventory
- D. show chassis
Answer: C
Explanation:
The show inventory command in Cisco IOS is designed specifically to display detailed hardware inventory information about a Cisco device. This includes:
Component Name: The name or type of each module or card installed.
PID (Product ID): The unique product identifier for the module.
VID (Version ID): The version identifier for the module.
Serial Number: The unique serial number assigned to the module.
Why other options are incorrect:
show chassis: Some Cisco devices support a show chassis command, but the information provided usually focuses on the physical chassis rather than detailed component inventory.
show items: This is not a standard Cisco IOS command.
show router: This command doesn't provide the level of granular hardware information that show inventory does.
NEW QUESTION # 48
Which command initiates the transfer of a Cisco IOS image over IP from ROMMON?
- A. tftpdnld
- B. Xmodem
- C. copy tftp: flash:
- D. copy flash: tftp:
Answer: A
NEW QUESTION # 49
What is the primary method for recovering or upgrading a Cisco network device system image?
- A. USB storage
- B. the tftpdnld command
- C. the xmodem command
- D. FTP
Answer: B
Explanation:
The tftpdnld command in Cisco IOS is specifically designed for recovering or upgrading a system image. Here's how it's the most effective method:
Purpose: The tftpdnld command directly initiates a TFTP download of a new system image and stores it in memory. This is ideal for replacing a corrupt image or upgrading to a newer version of Cisco IOS.
ROMmon: The tftpdnld command can often be used from ROMmon mode, which is essential when the existing image is unusable.
Efficiency: It streamlines the image transfer process specifically using TFTP, which is commonly used for Cisco IOS images.
Why other options are less ideal:
USB storage: While some newer Cisco devices may allow direct loading of an IOS image from USB, this isn't universally supported and often requires specific boot commands.
FTP: FTP (File Transfer Protocol) can be used for file transfers, but it's not as commonly used as TFTP in the context of Cisco IOS image recovery. The tftpdnld command offers a more tailored solution for this purpose.
the xmodem command: XMODEM is a legacy file transfer protocol that is slower and less reliable than TFTP, especially for larger files like Cisco IOS images.
NEW QUESTION # 50
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