[2025年最新] 最高の試験RCNI問題集は無料サイトの資料を試そう
無料High-stakes Industry RCNIオフィシャル認証ガイドPDFをダウンロード
質問 # 16
Which switch cannot exceed a maximum of 30W per port?
- A. ICX7150-48ZP
- B. ICX7150-C12P
- C. ICX7550
- D. ICX7650
正解：A
質問 # 17
Which method is required to install a feature license on an ICX running FastIron 08.0.95?
- A. FTP
- B. CLI
- C. TFTP
- D. USB
正解：C
質問 # 18
Which three objects can be assigned a Layer 3 address? (Choose three.)
- A. Virtual Ethernet
- B. Loopback
- C. Virtual LAN
- D. GRE tunnels
- E. VxLAN
- F. Stack Interface
正解：B、D、F
解説：
* Layer 3 Address Assignment:
* Stack Interface (A): A stack interface is a virtual interface representing all members of a stack.
It can be assigned a Layer 3 IP address for management or routing purposes.
* Loopback (E): Loopback interfaces are virtual interfaces always "up" and used for routing, management, or stable endpoint addressing.
* GRE Tunnels (F): GRE tunnels operate at Layer 3 and require IP addresses for both endpoints to encapsulate and route traffic.
* Why Not Other Options?
* B. VxLAN: VxLAN operates at Layer 2 over Layer 3 and does not require direct IP address assignment to itself.
* C. Virtual LAN: VLANs are Layer 2 constructs; while they are associated with SVI (Switch Virtual Interfaces), they are not directly assigned an IP address.
* D. Virtual Ethernet: Virtual Ethernet interfaces are typically Layer 2 and used within virtualized environments, not directly assigned Layer 3 addresses.
References:
* ICX Routing Configuration Guide: RUCKUS Documentation
質問 # 19
A Core, Aggregation, Edge topology network is running Rapid Spanning Tree Protocol (RSTP). Two switches at the edge are legacy and run 802.1D.
To influence the convergence time of the legacy switches at the edge, where are the timers modified?
- A. on the Aggregation switches connected to the legacy edge switches
- B. on the root bridge at the core
- C. on the two legacy 802.1D switches at the edge
- D. the route-only port on the upstream gateway
正解：A
解説：
* RSTP and Legacy 802.1D Compatibility:
* RSTP (802.1w) can interoperate with legacy switches running STP (802.1D). However, the legacy switches use different timers and convergence mechanisms, which can lead to delays.
* Optimizing Timers for Legacy Edge Switches:
* The edge switches running 802.1D rely on BPDU timing set by the upstream aggregation switches.
* To influence the convergence time, the timers such as hello time, max age, and forward delay must be adjusted on the aggregation switches connected to these legacy edge switches. This ensures better compatibility and faster convergence.
* Why Not Other Options?
* A: The route-only port does not participate in STP.
* B: Timers cannot be modified on legacy switches themselves as they strictly follow 802.1D standards.
* D: The root bridge sets global parameters but does not address edge-specific timer optimization.
References:
* RUCKUS RSTP/802.1D Compatibility Guide: RUCKUS Documentation
質問 # 20
Which two processes are used to add a new stack member to an existing stack? (Choose two.)
- A. stack suggested-id
- B. interactive setup
- C. stack priority configuration
- D. stack switchover
- E. manual configuration
正解：C、E
質問 # 21
As an IP packet is routed across subnets, which value gets updated at each hop?
- A. source IP address
- B. subnet mask
- C. destination IP address
- D. destination MAC address
正解：D
解説：
In network communications, when an IP packet traverses multiple subnets to reach its destination, certain header information is modified at each hop to facilitate proper routing and delivery.
* Destination MAC Address:
* Role: The Media Access Control (MAC) address is a hardware identifier used at the Data Link layer (Layer 2) of the OSI model.
* Update Process:
* As a packet moves from one router to the next, the destination MAC address is updated to reflect the MAC address of the next-hop device.
* This ensures that the packet is correctly forwarded at the Data Link layer within each local network segment.
* Explanation:
* When a router forwards a packet, it encapsulates the IP packet within a new Ethernet frame.
* The router sets the destination MAC address in this frame to the MAC address of the next- hop router or the final destination device if it is on the same local network.
* This process repeats at each hop, with each router updating the destination MAC address to ensure proper Layer 2 delivery.
* Other Header Fields:
* Destination IP Address:
* Remains unchanged throughout the packet's journey, ensuring end-to-end delivery to the correct device.
* Source IP Address:
* Also remains unchanged, identifying the original sender of the packet.
* Subnet Mask:
* Not a field within the packet header; it is used by routers to determine the network portion of an IP address but is not transmitted with the packet.
References:
* For a detailed understanding of how routers handle packet forwarding and the role of MAC addresses in this process, refer to the RUCKUS ICX Switch Configuration Guide, which provides insights into Layer 2 and Layer 3 forwarding mechanisms.
質問 # 22
Which two statements are true when Dynamic Host Configuration Protocol (DHCP) Snooping is enabled?
(Choose two.)
- A. DHCP snooping must be enabled per interface.
- B. DHCP snooping must be enabled globally.
- C. DHCP snooping must be enabled per VLAN.
- D. DHCP server interfaces should be trusted.
- E. All interfaces are trusted by default.
正解：B、D
解説：
Dynamic Host Configuration Protocol (DHCP) Snooping is a security feature that acts as a firewall between untrusted hosts and trusted DHCP servers. It helps prevent malicious or malformed DHCP traffic by monitoring DHCP messages and filtering untrusted sources.
When configuring DHCP Snooping on RUCKUS ICX switches, consider the following:
* Global Enablement: DHCP Snooping must be enabled globally on the switch to activate the feature across the device. This is done using the following command in global configuration mode:
ip dhcp snooping
* Trusted Interfaces: Interfaces connected to legitimate DHCP servers should be configured as trusted to allow DHCP server messages to pass through. This is configured per interface:
interface ethernet 1/1/1
ip dhcp snooping trust
Replace 1/1/1 with the appropriate interface identifier.
* VLAN Configuration: DHCP Snooping must be enabled on specific VLANs where DHCP services are required. This ensures that DHCP messages are monitored within those VLANs:
質問 # 23
ICX reserves some VLAN IDs for system functions. How many VLAN IDs are reserved?
- A. 0
- B. 1
- C. 2
- D. 3
正解：D
質問 # 24
Which ICX model can run silently in fanless mode?
- A. ICX7150-48ZP
- B. ICX7150-48P
- C. ICX7150-48PF
- D. ICX7550-24P
正解：C
解説：
The RUCKUS ICX7150 series includes models designed for silent operation, suitable for deployments in noise-sensitive environments such as offices or classrooms.
質問 # 25
Which two commands display Power over Ethernet (PoE) power budget? (Choose two.)
- A. show inline power detail
- B. show configuration
- C. show inline power
- D. show version
- E. show chassis
正解：A、C
解説：
To monitor and manage the PoE power budget on RUCKUS ICX switches, the following commands are utilized:
* show inline power Command:
* Purpose: Displays a summary of the PoE status, including total power capacity, power consumption, and available power.
* Usage:
* Access the switch's command-line interface (CLI).
* Enter the command:
plaintext
Copy code
show inline power
* Output Details:
* Power Capacity: Total PoE power available on the switch.
* Power Allocations: Power consumption per port, indicating which ports are supplying power to connected devices.
* Example Output:
plaintext
Copy code
Power Capacity: Total is 124000 mWatts. Current Free is 64000 mWatts.
Power Allocations: Requests Honored 8 times
Port Admin Oper ---Power (mWatts)--- PD Type PD Class Pri Fault/
State State Consumed Allocated Error
-----------------------------------------------------------------------------
1/1/1 On On 4733 30000 2P-IEEE Class 4 3 n/a
1/1/2 On Off 6015 30000 2P-IEEE Class 4 3 n/a
(additional ports)
質問 # 26
Which command can be used to identify Cyclic Redundancy Check (CRC) errors on port Ethernet 1/1/1?
- A. show port security ethernet 1/1/1
- B. show mac-address ethernet 1/1/1
- C. show interfaces brief ethernet 1/1/1
- D. show statistics ethernet 1/1/1
正解：D
解説：
* Locating CRC Errors:
* The show statistics ethernet [port] command provides detailed port statistics, including packet counts, errors, and specifically Cyclic Redundancy Check (CRC) errors.
* Why Other Commands Don't Work:
* B. show interfaces brief ethernet 1/1/1: This provides a summary of interface status but does not include detailed error information like CRC errors.
* C. show mac-address ethernet 1/1/1: This displays MAC address table entries for the specified port, unrelated to error statistics.
* D. show port security ethernet 1/1/1: This shows port security configurations and violations, not errors like CRC.
References:
* ICX Switch Command Reference: RUCKUS Documentation
質問 # 27
A Core, Aggregation, Edge topology network is running Rapid Spanning Tree Protocol (RSTP). Two switches at the edge are legacy and run 802.1D.
To influence the convergence time of the legacy switches at the edge, where are the timers modified?
- A. on the Aggregation switches connected to the legacy edge switches
- B. on the root bridge at the core
- C. on the two legacy 802.1D switches at the edge
- D. the route-only port on the upstream gateway
正解：A
質問 # 28
When using zero-touch stacking, which two prerequisites must be in place to ensure all devices join the stack? (Choose two.)
- A. enable stacking on the active controller
- B. enable stacking on all devices
- C. issue stack disable on intended member devices
- D. configure each unit's management IP, VLANs, and tagging
- E. ensure units have clean configurations
正解：A、E
質問 # 29
Which two commands can be used to display the IP address of a device attached to a switch port? (Choose two.)
- A. show arp
- B. show interface brief wide
- C. show interface
- D. show lldp neighbor detail
- E. show mac-address all
正解：A、D
解説：
To determine the IP address of a device connected to a specific switch port on a RUCKUS ICX switch, the following commands can be utilized:
* show lldp neighbor detail
This command provides detailed information about devices connected via LLDP, including their IP addresses.
Command Usage:
show lldp neighbor detail
Output Example:
Local Port: 1/1/2
Neighbor MAC: 60d0.2c1c.1cd0
System Name: RuckusAP
Management Address: 192.168.0.3
In this example, the Management Address field displays the IP address of the connected device on port 1/1/2.
Ruckus Wireless Community
* show arp
The Address Resolution Protocol (ARP) table maps IP addresses to MAC addresses. By examining the ARP table, you can identify the IP address associated with a device's MAC address.
Command Usage:
show arp
Output Example:
IP Address MAC Address Type Age Port
192.168.0.3 60d0.2c1c.1cd0 Dynamic 0 1/1/2
Here, the IP address 192.168.0.3 is associated with the MAC address 60d0.2c1c.1cd0 on port 1/1/2.
Ruckus Wireless Community
Note: For the show lldp neighbor detail command to provide IP addresses, LLDP must be enabled on both the switch and the connected devices. Additionally, the devices should support LLDP and be configured to advertise their management addresses.
質問 # 30
What are two differences between Class of Service (CoS) and Differentiated Services Code Point (DSCP)?
(Choose two.)
- A. DSCP operates at Layer 2 in OSI model, whereas CoS operates in Layer 3.
- B. CoS operates at Layer 2 in OSI model, whereas DSCP operates in Layer 3.
- C. CoS defines priority levels and DSCP manipulates traffic according to these defined priority levels.
- D. DSCP defines priority levels and CoS manipulates traffic according to these defined priority levels.
- E. DSCP is simpler and can scale easily as the network grows. CoS becomes more complex as network demand for prioritized data increase.
正解：B、E
解説：
Class of Service (CoS) and Differentiated Services Code Point (DSCP) are both mechanisms used to prioritize network traffic, but they function at different layers of the OSI model and have distinct characteristics:
* Operational Layer:
* CoS:
* Operates at Layer 2 (Data Link Layer) of the OSI model.
* Utilizes a 3-bit field within the 802.1Q VLAN tag, known as the Priority Code Point (PCP), to assign priority levels ranging from 0 to 7.
* DSCP:
* Operates at Layer 3 (Network Layer) of the OSI model.
* Uses a 6-bit field in the IP header to assign priority, allowing for up to 64 different values, providing more granularity in traffic classification.
* Scalability and Complexity:
* CoS:
* With only 8 possible priority levels, CoS offers limited granularity.
* As network demands increase, especially with diverse applications requiring different levels of service, managing and differentiating traffic with CoS can become complex due to its limited priority levels.
* DSCP:
* Provides 64 distinct priority levels, allowing for finer differentiation of traffic types.
* This granularity enables easier scalability and more straightforward management of diverse and growing network traffic demands.
References:
* For a detailed comparison between CoS and DSCP, refer to the NetworkLessons Notes on QoS CoS vs DSCP: QoS CoS vs DSCP - NetworkLessons Notes
* For an overview of Differentiated Services and traffic classification, see the article on GeeksforGeeks:
Differentiated Services (DiffServ) and Traffic Classification
Understanding these differences is crucial for network administrators when designing Quality of Service (QoS) policies to ensure efficient and effective traffic management across the network.
質問 # 31
Which device will become the root in the Spanning Tree election process?
- A. the device with the highest IP address
- B. the device with the highest bridge priority value
- C. the device with the lowest bridge ID
- D. the device with root guard enabled
正解：C
解説：
In the Spanning Tree Protocol (STP), the root bridge is the central reference point for all spanning tree calculations. The election of the root bridge is determined by the bridge ID (BID), which comprises two components:
* Bridge Priority:
* A configurable value ranging from 0 to 65,535, in increments of 4,096. The default priority is typically 32,768.
* MAC Address:
* The unique hardware address of the switch.
Root Bridge Election Process:
* Lowest Bridge ID Selection:
* STP elects the switch with the lowest bridge ID as the root bridge. The bridge ID is determined by combining the bridge priority and the MAC address.
* Priority Comparison:
* Switches first compare the bridge priority values. The switch with the lowest priority value is favored.
* MAC Address Comparison:
* If multiple switches share the same priority value, the switch with the lowest MAC address becomes the root bridge.
Example:
* Switch A:
* Priority: 32,768
* MAC Address: 00:1A:2B:3C:4D:5E
* Switch B:
* Priority: 32,768
* MAC Address: 00:1A:2B:3C:4D:5F
In this scenario, both switches have the same priority. Therefore, STP compares the MAC addresses, and Switch A, with the lower MAC address, is elected as the root bridge.
Key Points:
* Enabling root guard on a device does not influence its election as the root bridge; instead, it prevents designated ports from becoming root ports.
* The device with the lowest bridge ID (combination of priority and MAC address) is elected as the root bridge.
* A lower bridge priority value increases the likelihood of a switch becoming the root bridge.
References:
* Root Bridge Election in Spanning Tree Protocol
* Spanning Tree Protocol - Part 3: Bridge ID, Priority, System ID
Sources
質問 # 32
Which switch model provides the most 100Gb ports?
- A. ICX7850-32Q
- B. ICX7750-32Q
- C. ICX7850-48F
- D. ICX7850-48FS
正解：A
解説：
The RUCKUS ICX7850 series offers high-performance switches suitable for core and aggregation layers in enterprise networks. Among the models in this series:
* ICX7850-32Q:
* Overview:
* Designed for high-density 100GbE deployments.
* Port Configuration:
* 32 ports of 100GbE QSFP28.
* Use Case:
* Ideal for environments requiring extensive 100GbE connectivity, such as data centers or large enterprise cores.
* ICX7850-48F:
* Overview:
* Designed for high-density 25GbE deployments with additional uplink capabilities.
* Port Configuration:
* 48 ports of 1/10/25GbE SFP28.
* 8 ports of 40/100GbE QSFP28 for uplinks or stacking.
* Use Case:
* Suitable for aggregation layers where a mix of 25GbE access ports and high-speed uplinks are needed.
* ICX7750-32Q:
* Overview:
* Part of the ICX7750 series, designed for high-performance aggregation and core layers.
* Port Configuration:
* 32 ports of 40GbE QSFP+.
* Supports breakout cables for 10GbE connections.
* Use Case:
* Suitable for networks requiring 40GbE connectivity with flexibility for 10GbE access.
* ICX7850-48FS:
* Overview:
* Similar to the ICX7850-48F but includes MACsec support for enhanced security.
* Port Configuration:
* 48 ports of 1/10/25GbE SFP28 with MACsec.
* 8 ports of 40/100GbE QSFP28 for uplinks or stacking.
* Use Case:
* Ideal for secure aggregation layers requiring MACsec encryption.
References:
* For detailed specifications, refer to the ICX 7850 data sheet: ICX 7850 Data Sheet In summary, the ICX7850-32Q model offers the highest number of 100GbE ports among the listed options, making it the optimal choice for scenarios demanding extensive 100GbE connectivity.
質問 # 33
......
RUCKUS RCNIオフィシャル認証ガイドPDF：https://jp.fast2test.com/RCNI-premium-file.html