Practice Free JN0-106 Exam Online Questions
Question #1
You want to find out the chassis serial number of a Junos device.
Which command would display this information?
- A . show chassis environment
- B . show chassis hardware
- C . show chassis routing-engine
- D . show chassis location
Correct Answer: B
B
Explanation:
The show chassis hardware command in Junos OS displays detailed information about the hardware installed in the device, including the chassis itself. This command provides a list of all hardware components, their serial numbers, part numbers, and version information. When looking for the chassis serial number specifically, this command is the most direct and comprehensive way to retrieve that information, as it includes the serial number of the chassis among the details provided.
B
Explanation:
The show chassis hardware command in Junos OS displays detailed information about the hardware installed in the device, including the chassis itself. This command provides a list of all hardware components, their serial numbers, part numbers, and version information. When looking for the chassis serial number specifically, this command is the most direct and comprehensive way to retrieve that information, as it includes the serial number of the chassis among the details provided.
Question #2
Exhibit.
Referring to the exhibit, which routing configuration is required for these two users to access the remote server?
- A . Users must connect directly to the router.
- B . Users and the server require a default gateway.
- C . Trunk ports must be enabled on the switch.
- D . A routing protocol must be enabled on the router.
Correct Answer: B
B
Explanation:
For the users in the 10.1.1.0/24 subnet and the server in the 10.1.2.0/24 subnet to communicate with each other, they need to route packets through the router that connects these two subnets. Each user and the server need to have their default gateway set to the IP address of the router interface on their respective subnet (.254). This ensures that packets destined for other subnets are sent to the router, which then routes them to the correct destination subnet.
Reference: Juniper official documentation: Configuring Basic Routing.
General networking principles.
B
Explanation:
For the users in the 10.1.1.0/24 subnet and the server in the 10.1.2.0/24 subnet to communicate with each other, they need to route packets through the router that connects these two subnets. Each user and the server need to have their default gateway set to the IP address of the router interface on their respective subnet (.254). This ensures that packets destined for other subnets are sent to the router, which then routes them to the correct destination subnet.
Reference: Juniper official documentation: Configuring Basic Routing.
General networking principles.
Question #3
What is the primary system log file that is present in the default configuration of a Junos device?
- A . kmd
- B . messages
- C . vrrp
- D . jsrpd
Correct Answer: B
B
Explanation:
In the default configuration of a Junos device, the primary system log file is "messages" (B). This log file contains a wide range of system messages, including operational status changes, system errors, and other critical information, making it a key resource for troubleshooting and monitoring the system’s health.
B
Explanation:
In the default configuration of a Junos device, the primary system log file is "messages" (B). This log file contains a wide range of system messages, including operational status changes, system errors, and other critical information, making it a key resource for troubleshooting and monitoring the system’s health.
Question #4
What are two types of transit traffic that traverse the forwarding plane of a Layer 3 router? (Choose two.)
- A . unicast traffic
- B . multicast traffic
- C . exception traffic
- D . broadcast traffic
Correct Answer: AB
AB
Explanation:
Transit traffic that traverses the forwarding plane of a Layer 3 router includes both unicast and multicast traffic types. Unicast traffic is directed from a single source to a single destination, while multicast traffic is sent from one source to multiple destinations that are part of a multicast group. These types of traffic are efficiently routed through the network by leveraging the router’s forwarding plane capabilities. Exception traffic, which requires special handling by the control plane, and broadcast traffic, which is typically limited to a single broadcast domain and not usually forwarded by Layer 3 routers, are not considered standard types of transit traffic for the forwarding plane of a router.
AB
Explanation:
Transit traffic that traverses the forwarding plane of a Layer 3 router includes both unicast and multicast traffic types. Unicast traffic is directed from a single source to a single destination, while multicast traffic is sent from one source to multiple destinations that are part of a multicast group. These types of traffic are efficiently routed through the network by leveraging the router’s forwarding plane capabilities. Exception traffic, which requires special handling by the control plane, and broadcast traffic, which is typically limited to a single broadcast domain and not usually forwarded by Layer 3 routers, are not considered standard types of transit traffic for the forwarding plane of a router.
Question #5
You are asked to configure your device running Junos OS to automatically archive your configuration upon commit.
In this scenario, which two methods are supported by the Junos OS? (Choose two)
- A . SCP
- B . RCP
- C . FTP
- D . HTTP
Correct Answer: A, B
A, B
Explanation:
Junos OS supports multiple methods for automatically archiving configurations upon commit. Two of the supported methods are SCP (Secure Copy Protocol) and RCP (Remote Copy Protocol). These methods can be configured to save the configuration files to a remote server automatically whenever a commit is made.
Reference: Juniper Networks Documentation on Configuration Archival "You can configure Junos OS to automatically archive the configuration using protocols such as SCP and RCP upon commit."
A, B
Explanation:
Junos OS supports multiple methods for automatically archiving configurations upon commit. Two of the supported methods are SCP (Secure Copy Protocol) and RCP (Remote Copy Protocol). These methods can be configured to save the configuration files to a remote server automatically whenever a commit is made.
Reference: Juniper Networks Documentation on Configuration Archival "You can configure Junos OS to automatically archive the configuration using protocols such as SCP and RCP upon commit."
Question #6
Which two statements apply to the Routing Engine functions? (Choose two.)
- A . It responds to ping and traceroute commands.
- B . It maintains the routing tables.
- C . It does not process routing updates.
- D . It processes the transit traffic.
Correct Answer: A, B
A, B
Explanation:
The Routing Engine (RE) in Juniper Networks devices plays a critical role in the control plane operations. One of its functions includes responding to network utility commands like ping and traceroute, which are essential for diagnosing network connectivity and path issues. Furthermore, the RE is responsible for maintaining the routing tables, which contain information about network paths and destinations. These tables are vital for making forwarding decisions but are distinct from the actual forwarding of packets, which is handled by the Packet Forwarding Engine (PFE).
A, B
Explanation:
The Routing Engine (RE) in Juniper Networks devices plays a critical role in the control plane operations. One of its functions includes responding to network utility commands like ping and traceroute, which are essential for diagnosing network connectivity and path issues. Furthermore, the RE is responsible for maintaining the routing tables, which contain information about network paths and destinations. These tables are vital for making forwarding decisions but are distinct from the actual forwarding of packets, which is handled by the Packet Forwarding Engine (PFE).
Question #7
Which character is used to filter the command output in the Junos CLI?
- A . |
- B . >
- C . <
- D . ?
Correct Answer: A
A
Explanation:
In the Junos CLI, the pipe character | is used as a filter operator to refine command output. This operator can be combined with various filtering commands like match, except, count, etc., to display only the relevant portions of the command output. For example, using | match <pattern> filters the output to show only the lines that contain the specified pattern, making it easier to find specific information within extensive command output. This functionality is especially useful in managing and troubleshooting complex configurations and network states, allowing for more efficient analysis of the device’s operational status and configuration details.
A
Explanation:
In the Junos CLI, the pipe character | is used as a filter operator to refine command output. This operator can be combined with various filtering commands like match, except, count, etc., to display only the relevant portions of the command output. For example, using | match <pattern> filters the output to show only the lines that contain the specified pattern, making it easier to find specific information within extensive command output. This functionality is especially useful in managing and troubleshooting complex configurations and network states, allowing for more efficient analysis of the device’s operational status and configuration details.
Question #8
Which statement is correct concerning exception traffic processing?
- A . Exception traffic is always dropped during congestion.
- B . Exception traffic is rate-limited to protect the RE.
- C . Exception traffic is discarded by the PFE.
- D . Exception traffic is never forwarded.
Correct Answer: B
B
Explanation:
Exception traffic refers to packets that the Packet Forwarding Engine (PFE) cannot process normally and must be forwarded to the Routing Engine (RE) for further processing. This includes packets destined for the router itself or packets needing special handling that the PFE cannot provide. To protect the RE from being overwhelmed by such traffic, which could potentially impact the router’s control plane functions, exception traffic is rate-limited. This means that there’s a threshold to how much exception traffic can be sent to the RE, ensuring that the router’s critical management and control functions remain stable and responsive even during high traffic volumes or attacks.
B
Explanation:
Exception traffic refers to packets that the Packet Forwarding Engine (PFE) cannot process normally and must be forwarded to the Routing Engine (RE) for further processing. This includes packets destined for the router itself or packets needing special handling that the PFE cannot provide. To protect the RE from being overwhelmed by such traffic, which could potentially impact the router’s control plane functions, exception traffic is rate-limited. This means that there’s a threshold to how much exception traffic can be sent to the RE, ensuring that the router’s critical management and control functions remain stable and responsive even during high traffic volumes or attacks.
Question #9
You are creating a new policy to accept and redistribute routes into your IGP.
In this scenario, which match criteria would you use to identify the route prefixes to select?
- A . instance
- B . route-type
- C . neighbor
- D . route-filter
Correct Answer: D
D
Explanation:
When creating a new policy to accept and redistribute routes into your Interior Gateway Protocol (IGP), the route-filter match criteria is used to identify the route prefixes to select. The route-filter statement specifies which prefixes should be matched in a policy. This allows for precise control over which routes are accepted and redistributed, facilitating efficient and secure routing policies within the network.
Reference: "show | display set | match ge-0/0/2" indicating command examples and match criteria from Useful Juniper Commands.txt.
Juniper official documentation: Routing Policy and Firewall Filters Configuration Guide.
D
Explanation:
When creating a new policy to accept and redistribute routes into your Interior Gateway Protocol (IGP), the route-filter match criteria is used to identify the route prefixes to select. The route-filter statement specifies which prefixes should be matched in a policy. This allows for precise control over which routes are accepted and redistributed, facilitating efficient and secure routing policies within the network.
Reference: "show | display set | match ge-0/0/2" indicating command examples and match criteria from Useful Juniper Commands.txt.
Juniper official documentation: Routing Policy and Firewall Filters Configuration Guide.
Question #10
You received a new Junos device and are configuring the system-related settings. You must configure this device for the current date and time on the US West coast. You have set the time zone to America/Los_Angeies. however the time and date did not change.
In this scenario, which two additional actions would satisfy this requirement? (Choose two.)
- A . Set the date and time setting manually.
- B . Configure an NTP server.
- C . Configure a DNS server.
- D . Reboot the device.
Correct Answer: A, B
A, B
Explanation:
When configuring the system-related settings for the current date and time on a Junos device, especially for a specific time zone like America/Los_Angeles, and the time does not automatically adjust, two effective actions can be taken. Firstly, setting the date and time manually allows for immediate correction of the system clock. This can be done via the CLI with the appropriate set date and time command. Secondly, configuring the device to use an NTP server can provide ongoing synchronization with an accurate time source, ensuring that the device maintains the correct time and date automatically in the future, even in the case of restarts or minor drifts in the internal clock.
A, B
Explanation:
When configuring the system-related settings for the current date and time on a Junos device, especially for a specific time zone like America/Los_Angeles, and the time does not automatically adjust, two effective actions can be taken. Firstly, setting the date and time manually allows for immediate correction of the system clock. This can be done via the CLI with the appropriate set date and time command. Secondly, configuring the device to use an NTP server can provide ongoing synchronization with an accurate time source, ensuring that the device maintains the correct time and date automatically in the future, even in the case of restarts or minor drifts in the internal clock.