[Jun-2025] Pass Juniper JN0-105 Tests Engine pdf - All Free Dumps
Junos, Associate (JNCIA-Junos) Practice Tests 2025 | Pass JN0-105 with confidence!
Juniper JN0-105 Exam Syllabus Topics:
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NEW QUESTION # 33
Which process in the Junos OS is responsible for device management tasks including the CLI and commit operations?
- A. rpd
- B. mgd
- C. chassisd
- D. dcd
Answer: B
Explanation:
In Junos OS, the management daemon (mgd) is responsible for handling all the device management tasks, including processing CLI commands and handling commit operations. The mgd daemon interacts with the Junos OS configuration database and provides the necessary logic to ensure that configuration changes are syntactically correct and do not conflict with each other. When a user commits a configuration, mgd validates the changes, applies them to the running configuration, and ensures that the necessary daemons are notified of the changes to apply them accordingly.
NEW QUESTION # 34
Which two functions are performed by the PFE? (Choose two.)
- A. It maintains the routing table.
- B. It implements firewall filters.
- C. It forwards transit traffic.
- D. It selects active routes.
Answer: B,C
Explanation:
The Packet Forwarding Engine (PFE) in Junos OS performs several key functions, including implementing firewall filters (A) and forwarding transit traffic (C). The PFE applies firewall filter rules to incoming and outgoing traffic and is responsible for the high-speed forwarding of packets based on the information in the forwarding table.
NEW QUESTION # 35
Which criteria does the Junos OS use to select an active route when two entries exist in the routing table?
- A. the route with the lowest preference number
- B. the route with the highest preference number
- C. the route with the highest metric
- D. the most recently learned dynamic route
Answer: A
Explanation:
In Junos OS, when two entries for the same destination exist in the routing table, the route with the lowest preference number is selected as the active route. This preference number, also known as the route preference or administrative distance, is used to prioritize routes received from different routing protocols.
NEW QUESTION # 36
How many rescue configuration files are supported on a Junos device?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
Junos OS supports only 1 rescue configuration file on a device. This rescue configuration is a safeguard feature that allows network administrators to revert to a known good configuration in case of a configuration error or issue, ensuring network stability.
In Junos OS, each device supports only one rescue configuration file. The rescue configuration is a specific configuration that can be saved and later retrieved if needed. This is used as a fallback configuration that you know works and can be applied in case of an emergency or if the current configuration has issues.
Reference:
"You can create a rescue configuration file by using the request system configuration rescue save operational mode command. Each Junos OS device can have only one rescue configuration file."
NEW QUESTION # 37
What will the request system configuration rescue save command do?
- A. It activates the rescue configuration.
- B. It saves the candidate configuration as the rescue configuration.
- C. It saves the most recently committed configuration as the rescue configuration.
- D. It saves a configuration version prior to the configuration most recently committed as the rescue configuration.
Answer: C
Explanation:
The request system configuration rescue save command in Junos OS saves the most recently committed configuration as the rescue configuration. This rescue configuration can be used to recover the device if future configurations cause issues. It ensures there is a stable, known-good configuration to fall back on, which is crucial in network management and troubleshooting.
References:
* "rescue : save configurations as the rescue: request system configuration save .................( saves the current configs as a rescue configs )" from Useful Juniper Commands.txt.
* Juniper official documentation: Configuring and Activating a Rescue Configuration.
NEW QUESTION # 38
What does the user@router> clear log ospf-trace command accomplish?
- A. Trace parameters are removed from the OSPF protocol configuration.
- B. Logging data into ospf-trace is stopped.
- C. Data in the ospf-trace file is removed and logging continues.
- D. The ospf-trace file is deleted.
Answer: C
Explanation:
The clear log ospf-trace command on a Juniper Networks router is used specifically to manage the contents of the log file named ospf-trace. Executing this command clears or deletes the existing data within the ospf-trace log file but does not stop the logging process. The router continues to log new OSPF-related events and data into this file after the command is executed. This functionality is crucial for troubleshooting and monitoring the OSPF (Open Shortest Path First) protocol's operation by allowing network administrators to remove old or irrelevant log data while continuously capturing new events without interruption.
NEW QUESTION # 39
Which two external authentication methods does Junos support for administrative access? (Choose two.)
- A. ACE
- B. TACACS+
- C. RADIUS
- D. NIS
Answer: B,C
Explanation:
Junos OS supports several external authentication methods for administrative access, with TACACS+ (Terminal Access Controller Access-Control System Plus) and RADIUS (Remote Authentication Dial-In User Service) being among the most commonly used. Both TACACS+ and RADIUS are protocols that allow network devices to communicate with a central authentication server, enabling centralized control over user authentication and authorization. This centralization simplifies the management of user credentials and access policies, especially in larger networks with multiple devices.
NEW QUESTION # 40
Click the Exhibit button.
Referring to the exhibit, what is the source IP address of the ping that was executed?
- A. 10.23.0.3
- B. 10.23.0.2
- C. 10.24.0.4
- D. 10.12.0.2
Answer: B
Explanation:
The exhibit shows a ping test being executed from router R2 to the IP address 10.23.0.3. Since the ping command is issued on R2 and we see successful replies from 10.23.0.3, it means the source of the ping must be an interface on R2. Given the network diagram and the IP address scheme, the source IP address of the ping is on the interface ge-0/0/2 of R2, which is in the subnet 10.23.0.0/24. The only logical IP address for R2's interface in this subnet, based on standard networking practices and the given options, would be
10.23.0.2. The other addresses provided in the options belong to different subnets or are the destination of the ping itself.
NEW QUESTION # 41
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. route-type
- B. instance
- C. route-filter
- D. neighbor
Answer: C
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.
References:
* "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.
NEW QUESTION # 42
Which two statements are true about the candidate configuration? (Choose two.)
- A. Multiple users cannot modify the same candidate configuration.
- B. You can deploy multiple changes at the same time.
- C. You can discard changes before committing them.
- D. Candidate configuration changes are automatically applied.
Answer: B,C
Explanation:
The candidate configuration in Junos OS is a temporary configuration that allows network administrators to make and stage multiple configuration changes before applying them to the device. This approach enables the deployment of multiple changes in a single operation, ensuring that all configurations work together as intended before making them active. Additionally, the candidate configuration can be discarded if the administrator decides not to apply the staged changes, allowing for a "trial and error" approach without affecting the currently active configuration. This feature provides flexibility and reduces the risk of disruptive changes to the network.
NEW QUESTION # 43
Which command displays all IPv6 routes in the default routing instance?
- A. showroute table inet6.1
- B. showroute table inet6.0
- C. showroute table inet.l
- D. showroute table inet.0
Answer: B
Explanation:
In Junos OS, the command to display IPv6 routes in the default routing instance isshow route table inet6.0.
The routing tableinet6.0specifically holds IPv6 routes. The commandshow route table inet.0is used for IPv4 routes, andinet6.1orinet.l(assuminginet.lis a typo forinet.1) are not standard Junos routing tables for displaying IPv6 routes in the default routing instance.
NEW QUESTION # 44
Click the Exhibit button.
Referring to the exhibit, OSPF has three export policies that match different static route prefixes. The
10.10.10.0/24 static route does not match any terms in the policyl routing policy.
What happens next in this scenario?
- A. Thestaticrouteisevaluated by the poiicy3 routing policy.
- B. Thestaticrouteisrejected by the default routing policy.
- C. Thestaticrouteisevaluated by the poiicy2 routing policy.
- D. Thestaticrouteisrejected by the policyl routing policy.
Answer: C
Explanation:
In Junos, when multiple policies are applied to a routing protocol for route export, the routes are evaluated in the order in which the policies are listed. In the exhibit, the OSPF configuration has three export policies listed: policy1, policy2, and policy3. The static route 10.10.10.0/24 does not match any terms in policy1; therefore, it is not rejected by policy1 but is instead passed on to the next policy in the sequence, which is policy2.
If the static route matches a term in policy2 that permits the route, it will be exported into OSPF. If it does not match in policy2, it will then be evaluated by policy3. If there is no match in policy3 as well, and assuming there are no more policies listed, the route would then be subject to the default routing policy behavior, which typically rejects the route unless an explicit accept statement is present in the policies.
NEW QUESTION # 45
Exhibit.
Referring to the exhibit, which routing configuration is required for these two users to access the remote server?
- A. Users and the server require a default gateway.
- B. Trunk ports must be enabled on the switch.
- C. A routing protocol must be enabled on the router.
- D. Users must connect directly to the router.
Answer: A
Explanation:
In a typical network configuration, users and servers require a default gateway to communicate with devices on different networks or subnets. The default gateway is usually the router's interface on the same network, which routes the traffic to other networks. This is essential for the two users to access the remote server if the server is on a different subnet, which is indicated by the different network addresses.
NEW QUESTION # 46
When considering routing policies, which two statements are correct? (Choose two.)
- A. Policy terms are evaluated from top to bottom with action taken on the first match found.
- B. Policy terms are evaluated from top to bottom with the most restrictive action taken of all the matching terms.
- C. An import routing policy for BGP determines which received prefix advertisements are placed in the routing information base.
- D. Routing policies are applied to interfaces as input or export filters.
Answer: A,C
Explanation:
Routing policies in Junos OS are crucial for controlling route advertisements and path selection. The correct answers are B and C. An import routing policy for BGP determines which received prefix advertisements are placed in the routing information base (RIB), and policy terms are evaluated from top to bottom, with action taken on the first match found. This sequential evaluation allows for precise control over routing decisions.
NEW QUESTION # 47
Click the Exhibit button.
Referring to the exhibit, what should be configured on R1 to advertise a default static route into OSPF?
- A. a routing policy
- B. a loopback interface
- C. a management interface
- D. a firewall filter
Answer: A
Explanation:
To advertise a default static route into OSPF on router R1, a routing policy should be configured. This policy would typically include a statement to match the default route (0.0.0.0/0) and then apply an action to set the route as an OSPF external type, which would then be redistributed into the OSPF domain. The routing policy is a set of conditions and actions that determine how routes are imported into or exported from the routing table and how routes are shared between routing instances or routing protocols. After defining the policy, it must be applied to OSPF under the export section of the OSPF configuration on R1. This process will allow R1 to announce the default route to other OSPF routers in the network, which then can use it as a gateway of last resort to reach the Internet or other networks not explicitly known to the OSPF domain.
NEW QUESTION # 48
How many login classes are assignable to a user account?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
Junos OS supports multiple login classes that can be assigned to user accounts, allowing for different levels of access and permissions. The correct answer is C, 4. These classes include "super-user," "read-only,"
"operator," and "unauthorized." Each class provides a different level of access to the Junos device, ranging from full configuration and operational command privileges to limited access for monitoring and viewing configurations.
NEW QUESTION # 49
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