Juniper JN0-105 Exam Preparation Guide and PDF Download
Verified & Correct JN0-105 Practice Test Reliable Source May 06, 2024 Updated
NEW QUESTION # 11
Which two external authentication methods does Junos support for administrative access? (Choose two.)
- A. ACE
- B. RADIUS
- C. NIS
- D. TACACS+
Answer: D
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 # 12
Which process in the Junos OS is responsible for device management tasks including the CLI and commit operations?
- A. mgd
- B. rpd
- C. chassisd
- D. dcd
Answer: A
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 # 13
Which layer of the OSI model contains the IP address information?
- A. Layer 2
- B. Layer 4
- C. Layer 3
- D. Layer 1
Answer: C
Explanation:
The OSI (Open Systems Interconnection) model is a conceptual framework used to understand network interactions in seven distinct layers. IP (Internet Protocol) addresses are part of Layer 3, known as the Network Layer. This layer is responsible for packet forwarding, including routing through intermediate routers, and it handles the logical addressing scheme of the network to ensure that packets can be routed across multiple networks and reach their destination. IP addresses provide unique identifiers for network interfaces, allowing for communication between devices on a network or across different networks.
NEW QUESTION # 14
Click the Exhibit button.
Referring to the exhibit, what is the source IP address of the ping that was executed?
- A. 10.24.0.4
- B. 10.23.0.2
- C. 10.12.0.2
- D. 10.23.0.3
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 # 15
What are two examples of exception traffic? (Choose two.)
- A. ping to the local device
- B. log messages
- C. routing updates
- D. transit packets
Answer: B,C
Explanation:
Exception traffic includes traffic that is not simply forwarded by the router but requires special handling, such as routing updates (B) and log messages (C). These types of traffic are processed by the router's control plane rather than just being forwarded through the data plane.
NEW QUESTION # 16
Which service does RADIUS provide?
- A. authentication
- B. time synchronization
- C. DNS resolution
- D. routing
Answer: A
Explanation:
RADIUS, which stands for Remote Authentication Dial-In User Service, provides authentication services for users trying to access a network. It is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service.
NEW QUESTION # 17
Which two statements are correct about the empioyee@Ri> prompt? (Choose two.)
- A. You are at a shell prompt.
- B. You are in operational mode.
- C. R1 is the hostname of your device.
- D. You are in configuration mode.
Answer: B,C
Explanation:
In Junos OS, the prompt employee@R1> indicates the current context of the user interface. The 'R1' part of the prompt signifies the hostname of the device, which in this case is 'R1'. The absence of a '#' symbol at the end of the prompt suggests that the user is in operational mode, as opposed to configuration mode which is indicated by a prompt ending in '#'. Operational mode allows users to view the status of the device and execute operational commands, but does not allow for configuration changes.
NEW QUESTION # 18
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. Thestaticrouteisrejected by the policyl routing policy.
- D. Thestaticrouteisevaluated by the poiicy2 routing policy.
Answer: D
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 # 19
Which statement is correct when multiple users are configuring a Junos device using the configure private command?
- A. Each user shares the same candidate configuration.
- B. A commit by any user will commit changes made by all active users.
- C. Each user gets their own candidate configuration.
- D. A commit will not succeed until there is only a single user in configuration mode.
Answer: C
Explanation:
When multiple users are configuring a Junos device using the "configure private" command, each user gets their own candidate configuration (C). This allows for isolated configuration sessions, where changes made by one user do not impact or interfere with the changes made by another user in their private session.
NEW QUESTION # 20
Which two statements are true about the candidate configuration? (Choose two.)
- A. You can deploy multiple changes at the same time.
- B. Multiple users cannot modify the same candidate configuration.
- C. You can discard changes before committing them.
- D. Candidate configuration changes are automatically applied.
Answer: A,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 # 21
How many rescue configuration files are supported on a Junos device?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
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.
NEW QUESTION # 22
Which three benefits occur when operating an interior gateway protocol (IGP) in an autonomous system (AS)?
(Choose three.)
- A. IGPs learn everything about the subnets and best paths within your network.
- B. IGPs determine the optimal paths for data transmission.
- C. IGPs automatically distribute static routing information.
- D. IGPs learn prefixes in the global Internet's routing table.
- E. IGPs react very fast to network change.
Answer: A,B,E
Explanation:
Operating an Interior Gateway Protocol (IGP) within an Autonomous System (AS) provides several benefits, including determining the optimal paths for data transmission (B), reacting quickly to network changes (D), and learning all about the subnets and best paths within the network (E). IGPs are designed to manage routing within a single AS efficiently, adapting to changes and ensuring data is routed through the best available paths.
NEW QUESTION # 23
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-filter
- B. neighbor
- C. route-type
- D. instance
Answer: A
Explanation:
When creating a policy to accept and redistribute routes into your IGP, "route-filter" (D) is the match criteria used to identify specific route prefixes. Route filters enable you to specify which routes should be accepted, rejected, or modified based on their attributes, such as prefix length or value.
NEW QUESTION # 24
What are two types of transit traffic that traverse the forwarding plane of a Layer 3 router? (Choose two.)
- A. broadcast traffic
- B. multicast traffic
- C. unicast traffic
- D. exception traffic
Answer: B,C
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.
NEW QUESTION # 25
Your network infrastructure transports data, voice, and video traffic. Users are complaining that voice and video calls are not performing to their expectations.
In this scenario, which technology would you implement to improve voice and video performance on your network?
- A. STP
- B. CoS
- C. NAT
- D. IPv6
Answer: B
Explanation:
In a network that carries diverse types of traffic like data, voice, and video, ensuring the performance of latency-sensitive applications such as voice and video calls is crucial. Class of Service (CoS) is a technology designed to prioritize network traffic, ensuring that critical applications like voice and video receive the necessary bandwidth and minimal latency. CoS mechanisms can include traffic classification, traffic policing, queue management, and scheduling. By implementing CoS, network administrators can assign higher priority to voice and video traffic, thus improving their performance across the network and addressing the users' complaints about call quality.
NEW QUESTION # 26
Exhibit
Exhibit
[edit]
root# set system host-name TEST_DEVICE [edit]
root# commit
[edit]
'system'
Missing mandatory statement: 'root-authentication' error: commit failed: (missing mandatory statements)
[edit] root#
You are configuring a new device.
Which action solves the error shown in the exhibit?
- A. configuring a non-root username and password
- B. reinstalling Junos
- C. configuring a password for the root account
- D. loading the factory-default configuration
Answer: C
Explanation:
The error message in the exhibit indicates that the root-authentication statement is missing, which is mandatory for committing the configuration. In Junos OS, it is required to set a password for the root account to commit any configuration changes. This is a security measure to ensure that unauthorized users cannot access the device's configuration mode. To solve the error shown in the exhibit, configuring a password for the root account is necessary. This can be done by using theset system root-authentication plain-text-password command, after which the user will be prompted to enter a new password for the root account.
NEW QUESTION # 27
What are two link-state routing protocols? (Choose two.)
- A. OSPF
- B. IS-IS
- C. RIP
- D. BGP
Answer: A,B
Explanation:
Link-state routing protocols are a type of routing protocol used in packet-switching networks for finding the best path between source and destination. OSPF (Open Shortest Path First) and IS-IS (Intermediate System to Intermediate System) are both examples of link-state routing protocols. They work by maintaining a complete map or topology of the network, allowing routers to independently calculate the best path to each destination.
Unlike distance-vector protocols like RIP, link-state protocols are more efficient and scalable, making them suitable for larger networks.
NEW QUESTION # 28
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