UPDATED [Jul 13, 2025] Pass RUCKUS Certified Networking Implementer Exam with Latest Questions
RCNI Exam Practice Questions prepared by RUCKUS Professionals
RUCKUS RCNI Exam Syllabus Topics:
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NEW QUESTION # 33
Which two commands display license information? (Choose two.)
- A. show inline power
- B. show who
- C. show license
- D. show chassis
- E. show version
Answer: C,E
Explanation:
To display license information on a RUCKUS ICX switch, the following CLI commands are utilized:
* show version:
* This command provides detailed information about the switch's software and hardware, including installed licenses.
* Usage:
sql
Copy code
show version
* Output Includes:
* Software version
* Boot code version
* License level and status
* Hardware model
* show license:
* This command displays specific details about all installed licenses on the switch.
* Usage:
sql
Copy code
show license
* Output Includes:
* License type
* Activation status
* Feature set enabled by the license
* Expiration date (if applicable)
Example Outputs:
* show version:
SW: Version 08.0.95dT213
Boot-Monitor Image: 10.1.15T225
HW: ICX7150-48P
License: L3 Premium
This output indicates the switch is running software version 08.0.95dT213 with an active Layer 3 Premium license.
* show license:
License Level: L3 Premium
License Type: Permanent
License Status: Active
This output confirms the Layer 3 Premium license is permanently active on the switch.
References:
* Ruckus ICX Switch Licensing Guide
NEW QUESTION # 34
For multicast clients to stop receiving traffic using a leave request, which protocol must run on the local subnet?
- A. IGMPv2
- B. IGMP Snooping
- C. IGMPv1
- D. PIM Dense
Answer: A
Explanation:
The Internet Group Management Protocol (IGMP) is used by IPv4 hosts and adjacent routers to establish multicast group memberships. Different versions of IGMP provide varying capabilities for managing these memberships.
IGMPv2 introduced the ability for hosts to send "leave group" messages when they wish to unsubscribe from a multicast group. This feature allows for more efficient management of multicast group memberships by enabling routers to promptly stop forwarding multicast traffic to subnets where there are no interested receivers.
When a host leaves a multicast group in an IGMPv2-enabled network, the following process occurs:
* Leave Message Sent: The host sends an IGMP leave message to the all-routers multicast address (224.0.0.2).
* Query by Router: Upon receiving the leave message, the router sends a group-specific query to determine if there are any remaining members of the multicast group on the local subnet.
* Group Membership Determination: If no hosts respond to the query within a specified time, the router concludes that there are no remaining members and ceases forwarding multicast traffic for that group to the subnet.
This mechanism reduces unnecessary multicast traffic and optimizes network performance.
In contrast, IGMPv1 does not have a leave group message; routers must rely on a timeout period to determine the absence of group members, leading to increased leave latency.
For more detailed information on IGMPv2 and its leave group mechanism, refer to the Cisco documentation on IGMP.
NEW QUESTION # 35
Which device will become the root in the Spanning Tree election process?
- A. the device with root guard enabled
- B. the device with the highest bridge priority value
- C. the device with the highest IP address
- D. the device with the lowest bridge ID
Answer: D
Explanation:
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
NEW QUESTION # 36
Which command enables global IPv6 capabilities?
- A. ipv6 unicast-routing
- B. ipv6 multicast
- C. ipv6 dhcp6-server enable
- D. ipv6 nd proxy
Answer: A
Explanation:
To enable IPv6 functionality on a RUCKUS ICX switch, you must activate IPv6 unicast routing globally.
This allows the switch to forward IPv6 packets and participate in IPv6 routing.
Steps to Enable IPv6 Unicast Routing:
* Access the Switch's Command-Line Interface (CLI):
* Connect to the switch via console, SSH, or Telnet.
* Enter privileged EXEC mode:
plaintext
Copy code
enable
* Enter Global Configuration Mode:
* Switch to global configuration mode:
plaintext
Copy code
configure terminal
* Enable IPv6 Unicast Routing:
* Activate IPv6 unicast routing:
ipv6 unicast-routing
* Configure IPv6 Addresses on Interfaces (Optional):
* Assign IPv6 addresses to the desired interfaces:
interface ethernet 1/1/1
ipv6 address 2001:db8::1/64
* Verify the Configuration:
* Exit to privileged EXEC mode and display the running configuration to confirm:
end
show running-config
References:
* For detailed information on configuring IPv6 addresses, refer to the RUCKUS FastIron Layer 3 Routing Configuration Guide: Configuring a global or site-local IPv6 address with a manually configured interface ID By following these steps, you enable the switch to handle IPv6 traffic, facilitating IPv6 communication within your network.
NEW QUESTION # 37
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. the route-only port on the upstream gateway
- C. on the root bridge at the core
- D. on the two legacy 802.1D switches at the edge
Answer: A
Explanation:
* 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
NEW QUESTION # 38
At which prompt can the ping command be executed?
- A. ICX7150-C12 Router(config)#
- B. ICX7150-C12 Router(config-if-e1000-1/1/1)#
- C. ICX7150-C12 Router(config-if-mgmt-1)#
- D. ICX7150-C12 Router#
Answer: D
Explanation:
* Understanding CLI Levels:
* The ping command is used to test connectivity to other devices by sending ICMP echo requests.
* It can only be executed from the privileged EXEC mode, which is indicated by the Router# prompt.
* Why Other Prompts Don't Work:
* A. Router(config-if-mgmt-1)#: This is the interface configuration mode for the management port and does not allow execution of diagnostic commands like ping.
* B. Router(config)#: This is the global configuration mode, which is used to configure the switch but does not support diagnostic commands.
* D. Router(config-if-e1000-1/1/1)#: This is the interface configuration mode for Ethernet 1/1/1, which also does not allow execution of ping.
References:
* RUCKUS ICX CLI Guide: RUCKUS Documentation
NEW QUESTION # 39
Which switch model provides the most 100Gb ports?
- A. ICX7850-32Q
- B. ICX7850-48FS
- C. ICX7750-32Q
- D. ICX7850-48F
Answer: A
Explanation:
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.
NEW QUESTION # 40
What is the maximum distance between ICX devices in a stack?
- A. 40 kilometers
- B. 9 meters
- C. 1 kilometer
- D. 3 meters
Answer: A
Explanation:
RUCKUS ICX switches support stacking over both copper and fiber connections, allowing for flexible deployment across various distances:
* Copper Stacking Cables:
* Maximum Distance:
* Up to 5 meters using active direct-attach copper (DAC) cables.
* Use Case:
* Suitable for stacking switches within the same rack or in close proximity.
* Fiber-Optic Stacking Cables:
* Maximum Distance:
* Up to 40 kilometers using appropriate optical transceivers and single-mode fiber.
* Use Case:
* Ideal for stacking switches located in different buildings or across a campus environment.
References:
* For detailed information on stacking distances and supported optics, refer to the FastIron stacking distances and optics guide: FastIron stacking distances and optics by device By utilizing fiber-optic connections with appropriate transceivers, ICX switches can be stacked over substantial distances, providing flexibility in network design and deployment.
NEW QUESTION # 41
Which two statements are true when Dynamic Host Configuration Protocol (DHCP) Snooping is enabled? (Choose two.)
- A. DHCP snooping must be enabled per VLAN.
- B. DHCP snooping must be enabled per interface.
- C. DHCP snooping must be enabled globally.
- D. DHCP server interfaces should be trusted.
- E. All interfaces are trusted by default.
Answer: A,D
NEW QUESTION # 42
The root bridge is connected to another switch over two independent 10Gbe links. Which link will remain in a forwarding state on both sides?
- A. the link with the lowest port number on the non-root switch
- B. the link with the highest port number on the non-root switch
- C. the link with the lowest port number on the root switch
- D. the link with the highest port number on the root switch
Answer: C
NEW QUESTION # 43
What are two differences between Class of Service (CoS) and Differentiated Services Code Point (DSCP)?
(Choose two.)
- A. DSCP is simpler and can scale easily as the network grows. CoS becomes more complex as network demand for prioritized data increase.
- B. CoS defines priority levels and DSCP manipulates traffic according to these defined priority levels.
- C. DSCP operates at Layer 2 in OSI model, whereas CoS operates in Layer 3.
- D. CoS operates at Layer 2 in OSI model, whereas DSCP operates in Layer 3.
- E. DSCP defines priority levels and CoS manipulates traffic according to these defined priority levels.
Answer: A,D
Explanation:
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.
NEW QUESTION # 44
Based on the following configuration, which statement is true?
ICX-Router (config)# ipv6 unicast-routing
ICX-Router (config)# interface ethernet 1/3/1
ICX-Router (config-if-e1000-1/3/1)# ip address 10.172.10.1/24
ICX-Router (config-if-e1000-1/3/1)# ipv6 address 2001:db8:12d:1300::/64
- A. ICX devices only support dual-stacked IPv4 and IPv6 configuration on a VE interface.
- B. The ipv6 enable command must also be configured at the interface level.
- C. ICX devices do not support IPv4 and IPv6 addresses configured on the same interface.
- D. The interface will transmit and receive both IPv4 and IPv6 traffic simultaneously.
Answer: D
NEW QUESTION # 45
Which command must be configured at the interface level to honor Differentiated Services Code Point (DSCP)-based Class of Service (CoS) on a ICX7750?
- A. qos profile
- B. ip dscp-remark 1
- C. trust dscp
- D. qos-tos map dscp-priority
Answer: C
NEW QUESTION # 46
Which two commands display Power over Ethernet (PoE) power budget? (Choose two.)
- A. show inline power
- B. show chassis
- C. show version
- D. show configuration
- E. show inline power detail
Answer: A,E
Explanation:
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)
NEW QUESTION # 47
What is one advantage of the supportsave command versus the show tech-support command?
- A. Generates automatically after a system crash.
- B. Allows the transfer of collected data to TFTP.
- C. Uses fewer CPU cycles during execution.
- D. Uploads directly to RUCKUS support.
Answer: B
Explanation:
* Comparison Between supportsave and show tech-support:
* show tech-support: Generates diagnostic information and displays it on the CLI. It does not directly save or transfer the output.
* supportsave: Gathers similar diagnostic data but also allows the data to be transferred to a remote server, such as via TFTP, for easier analysis.
* Why Other Options Don't Apply:
* A. Uses fewer CPU cycles during execution: Both commands are similar in terms of resource usage.
* C. Uploads directly to RUCKUS support: Data transfer to RUCKUS support requires manual intervention.
* D. Generates automatically after a system crash: Neither command generates data automatically; both require user execution.
References:
* ICX Switch SupportSave Command Guide: RUCKUS Documentation
NEW QUESTION # 48
Why is the following command failing?
RKUS-01(config)#vlan 1
RKUS-01(config-vlan-1)#tagged ethernet 1/2/1
Invalid input -> tagged ethernet 1/2/1
Type ? for a list
- A. A Virtual Ethernet interface must be defined before a tagged port can be added.
- B. The default VLAN cannot be tagged to any interfaces.
- C. VLAN 1 must be configured as a protocol-based VLAN before tagged ports can be added.
- D. This model ICX does not have an interface Ethernet 1/2/1.
Answer: B
Explanation:
In RUCKUS ICX switches, VLAN 1 is the default VLAN and is typically used for management purposes. By default, all ports are members of VLAN 1 as untagged. Attempting to configure VLAN 1 as tagged on a port can result in an error, as the system restricts tagging the default VLAN.
Understanding the Error:
RKUS-01(config)# vlan 1
RKUS-01(config-vlan-1)# tagged ethernet 1/2/1
Invalid input -> tagged ethernet 1/2/1
Type ? for a list
This error occurs because the switch does not allow tagging of the default VLAN (VLAN 1) on any interface.
Resolution:
* Option 1: Use a Different VLAN for Tagging
* Create a new VLAN (e.g., VLAN 2) and configure it as tagged on the desired port.
RKUS-01(config)# vlan 2
RKUS-01(config-vlan-2)# tagged ethernet 1/2/1
* Option 2: Change the Default VLAN ID
* If you must use VLAN 1 as tagged, you can change the default VLAN ID to another VLAN (e.g., VLAN 2), allowing VLAN 1 to be configured as tagged.
RKUS-01(config)# default-vlan-id 2
RKUS-01(config)# vlan 1
RKUS-01(config-vlan-1)# tagged ethernet 1/2/1
NEW QUESTION # 49
Which three conditions allow an ARP request or response to pass a Dynamic ARP Inspection (DAI) check?
(Choose three.)
- A. Request originated on a trusted port.
- B. Client authenticated using MAC authentication.
- C. There is a static reservation for the IP/MAC pair in the DHCP pool.
- D. A static ARP entry exists for the IP/MAC pair with the inspection flag set.
- E. The IP/MAC pair appear in the DHCP binding database.
- F. Client authenticated using RADIUS on an 802.1X enabled port.
Answer: A,D,E
Explanation:
Dynamic ARP Inspection (DAI) is a security feature that intercepts and validates Address Resolution Protocol (ARP) packets in a network. It ensures that only legitimate ARP requests and responses are relayed, preventing ARP spoofing and man-in-the-middle attacks.
Conditions Allowing ARP Packets to Pass DAI Checks:
* IP/MAC Pair in the DHCP Binding Database:
* When DHCP snooping is enabled, the switch maintains a binding table of IP-to-MAC address mappings assigned by the DHCP server.
* DAI uses this database to verify that ARP packets have legitimate IP/MAC address pairs.
* If the ARP packet's IP/MAC pair matches an entry in the DHCP binding database, it passes the DAI check.
* Static ARP Entry with Inspection Flag Set:
* Administrators can configure static ARP entries for known devices, marking them as trusted for DAI purposes.
* These entries include the IP/MAC pair and are flagged to bypass DAI checks.
* An ARP packet matching a static entry with the inspection flag set will pass the DAI check.
* Request Originated on a Trusted Port:
* Ports can be designated as trusted, typically those connected to other switches or network devices.
* DAI does not inspect ARP packets arriving on trusted ports, assuming they are from legitimate sources.
* Therefore, ARP requests or responses from a trusted port pass the DAI check.
References:
* For more information on configuring DAI and related security features, refer to the RUCKUS FastIron Layer 3 Routing Configuration Guide: Dynamic ARP Inspection overview Implementing DAI with these conditions helps protect the network from ARP-based attacks by ensuring that only validated ARP traffic is permitted.
NEW QUESTION # 50
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. the route-only port on the upstream gateway
- C. on the root bridge at the core
- D. on the two legacy 802.1D switches at the edge
Answer: A
NEW QUESTION # 51
Which two commands can be used to display the IP address of a device attached to a switch port? (Choose two.)
- A. show interface
- B. show lldp neighbor detail
- C. show mac-address all
- D. show interface brief wide
- E. show arp
Answer: B,E
Explanation:
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.
NEW QUESTION # 52
What is one advantage of the supportsave command versus the show tech-support command?
- A. Generates automatically after a system crash.
- B. Allows the transfer of collected data to TFTP.
- C. Uses fewer CPU cycles during execution.
- D. Uploads directly to RUCKUS support.
Answer: D
NEW QUESTION # 53
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