The Realest Study Materials JN0-105 Dumps Updated Aug 05, 2024
LATEST JN0-105 Exam Practice Material
NEW QUESTION # 49
Which type of device uses the destination IP address to forward packets?
- A. repeater
- B. hub
- C. Layer 3 router
- D. Layer 2 switch
Answer: C
Explanation:
A Layer 3 router uses the destination IP address to forward packets. The correct answer is A. Routers operate at Layer 3 of the OSI model and make forwarding decisions based on IP addresses. They are responsible for routing packets across different networks by examining the destination IP address contained in the packet's header.
NEW QUESTION # 50
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. route-filter
- D. neighbor
Answer: C
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 # 51
What is a benefit of using J-Web?
- A. It provides more advanced features than the CLI.
- B. It provides console-based management.
- C. It simultaneously manages multiple devices.
- D. It provides a customizable dashboard.
Answer: D
Explanation:
If you've committed a configuration and then need to revert to the previous configuration, therollback command is used. Since the incorrect IP address has not been committed, as indicated by thecommit check command being successful, issuingrollback 1will undo the changes made in the current session, which includes the accidental entry of the IP address.
NEW QUESTION # 52
Which two statements are correct about the empioyee@Ri> prompt? (Choose two.)
- A. You are in operational mode.
- B. You are at a shell prompt.
- C. R1 is the hostname of your device.
- D. You are in configuration mode.
Answer: A,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 # 53
Click the Exhibit button.
Referring the exhibit, what does the highlighted number indicate?
- A. route preference is 5
- B. metric is 5
- C. hop count is 5
- D. cost is 5
Answer: A
Explanation:
In the exhibit shown, the highlighted number next to the route type (Static) within the square brackets indicates the route preference, also known as the administrative distance. In Junos, the route preference is a value that determines the priority of the route source. Lower numbers indicate a higher priority when the routing table is being calculated. The route preference is used to select the best route when multiple paths to the same destination exist from different routing sources. The number 5 is unusually low for a static route by default, suggesting it has been manually configured to override other route types.
NEW QUESTION # 54
Which two statements are correct regarding Layer 2 network switches? (Choose two.)
- A. Switches flood broadcast traffic.
- B. Switches do not learn MAC addresses.
- C. Switches create a single collision domain.
- D. Switches are susceptible to traffic loops.
Answer: A,D
Explanation:
Layer 2 network switches are crucial components in local area networks (LANs), providing multiple functions for data packet forwarding and network segmentation. One inherent characteristic of switches is their susceptibility to traffic loops, especially in networks with redundant paths. Without proper loop prevention protocols like Spanning Tree Protocol (STP), loops can cause broadcast storms and network instability.
Additionally, switches inherently flood broadcast traffic to all ports within the broadcast domain, except the port on which the broadcast was received. This is because broadcast frames are meant to be delivered to all devices within the VLAN, and the switch ensures this by flooding these frames to all ports in the VLAN, except the source port.
NEW QUESTION # 55
What does the user@router> clear log ospf-trace command accomplish?
- A. The ospf-trace file is deleted.
- B. Logging data into ospf-trace is stopped.
- C. Trace parameters are removed from the OSPF protocol configuration.
- D. Data in the ospf-trace file is removed and logging continues.
Answer: D
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 # 56
What are two benefits when implementing class of service? (Choose two.)
- A. Traffic congestion will be eliminated.
- B. Latency-sensitive traffic can be prioritized
- C. The network will be faster.
- D. Traffic congestion can be managed.
Answer: A,B
Explanation:
Implementing Class of Service (CoS) in a network provides numerous benefits, particularly in managing traffic based on its importance, source, or type. CoS enables network administrators to manage traffic congestion by applying various queuing techniques and policies to ensure that critical services remain unaffected during high congestion periods. Additionally, CoS allows for the prioritization of latency-sensitive traffic such as voice and video, ensuring that these services maintain quality despite varying network conditions.
NEW QUESTION # 57
You are logged in to a Junos OS device with SSH and issued the show protocols | compare command in the configuration, but no output is shown.
Which statement is correct in this scenario?
- A. There are no changes to the candidate configuration.
- B. Someone accidentally deleted the active configuration.
- C. You must commit the configuration before any output will be shown.
- D. The command only works for interface configuration differences.
Answer: A
Explanation:
If issuing the "show | compare" command in configuration mode yields no output, it indicates that there are no changes to the candidate configuration (B). This command is used to compare the current candidate configuration with the active configuration, and a lack of output suggests that the candidate configuration matches the active one, meaning no changes have been made or the changes have already been committed.
NEW QUESTION # 58
What are two functions of the Routing Engine? (Choose two.)
- A. It runs the Junos operating system.
- B. It processes all management traffic.
- C. It evaluates firewall filters for transit traffic.
- D. It processes transit traffic.
Answer: A,B
Explanation:
The Routing Engine (RE) in Junos OS has several critical functions, including processing all management traffic (A) and running the Junos operating system (B). The RE handles system management tasks, user interfaces, system services, and routing protocol processes. It does not directly process transit traffic or evaluate firewall filters for transit traffic, as these tasks are handled by the Packet Forwarding Engine (PFE).
NEW QUESTION # 59
Which statement is correct when multiple users are configuring a Junos device using the configure private command?
- A. Each user gets their own candidate configuration.
- B. A commit by any user will commit changes made by all active users.
- C. Each user shares the same candidate configuration.
- D. A commit will not succeed until there is only a single user in configuration mode.
Answer: A
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 # 60
Which three benefits occur when operating an interior gateway protocol (IGP) in an autonomous system (AS)?
(Choose three.)
- A. IGPs automatically distribute static routing information.
- B. IGPs learn prefixes in the global Internet's routing table.
- C. IGPs learn everything about the subnets and best paths within your network.
- D. IGPs determine the optimal paths for data transmission.
- E. IGPs react very fast to network change.
Answer: C,D,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 # 61
Which two statements about firewall filters are correct? (Choose two.)
- A. Firewall filters are stateless.
- B. Firewall filters can match Layer 7 parameters.
- C. Firewall filters are stateful.
- D. Firewall filters can match Layer 4 parameters.
Answer: A,D
Explanation:
Firewall filters in Junos OS are stateless, meaning they process each packet individually without regard to the state of a connection or sequence of packets. These filters can match various packet attributes, including those at Layer 4, such as TCP and UDP port numbers. This allows for granular control over traffic based on the type of service or application. Unlike stateless filters, stateful firewalls keep track of the state of active connections and make decisions based on the context of the traffic flow, which is not a capability of Junos firewall filters.
Additionally, Junosfirewall filters primarily operate up to Layer 4 and do not natively inspect Layer 7 parameters, which involve application-level data.
NEW QUESTION # 62
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 # 63
What are two link-state routing protocols? (Choose two.)
- A. RIP
- B. BGP
- C. OSPF
- D. IS-IS
Answer: C,D
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 # 64
What are two advantages of using the Junos OS? (Choose two.)
- A. It is modular.
- B. It enables you to roll back to a previous configuration.
- C. It pushes your configuration changes "live" immediately.
- D. It supports up to a maximum of two previous configurations.
Answer: A,B
Explanation:
One of the key advantages of Junos OS is its ability to roll back to previous configurations. This feature allows administrators to revert to an earlier configuration state, which is invaluable for quickly recovering from configuration errors or undesired changes. Junos OS maintains an archive of previous configurations, enabling easy rollback to any saved state. Another significant advantage of Junos OS is its modular design. The operating system is structured so that different processes and services run in separate protected memory spaces, enhancing the stability and reliability of the system. If one process fails, it does not affect the others, thereby minimizing the risk of system-wide failures.
NEW QUESTION # 65
Exhibit
user@router> show route 192.168.100.2
inet.O: 15 destinations, 17 routes (15 active, 0 holddown, 0 hidden) Limit/Threshold: 1048576/1048576 destinations
+ = Active Route, - = Last Active, * = Both 192.168.100.2/32*[OSPF/IO] 00:14:29, metric 1
> to 172.16.1.6 via ge-0/0/1.0 [BGP/170] 00:06:49, localpref 100
AS path: 65102 I, validation-state: unverified > to 172.16.1.6 via ge-0/0/1.0 Referring to the exhibit, which statement is correct?
- A. The BGP route is preferred over the OSPF route.
- B. / Traffic is load-balanced across two routes.
- C. The OSPF path is the only active route.
- D. The BGP path is the only active route.
Answer: C
Explanation:
Referring to the exhibit, the presence of the "+" symbol next to the OSPF route for 192.168.100.2/32 indicates that this is the active route being used to forward traffic. The BGP route, although present, does not have the
"+" symbol, indicating it is not the active route. In Junos OS, the routing table displays the active route with a
"+" symbol, and the fact that the OSPF route has this symbol means it is the preferred path based on the routing protocol'sdecision process, which takes into account factors such as route preference (administrative distance) and metrics.
NEW QUESTION # 66
What will the request system configuration rescue save command do?
- A. It saves the candidate configuration as the rescue configuration.
- B. It activates 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, making A the correct answer. This feature allows administrators to set a known good configuration that can be quickly reverted to in case of configuration errors or issues.
NEW QUESTION # 67
Exhibit
[edit system archival] user@router# show configuration {
transfer-on-commit; archive-sites {
"scp://[email protected] : /archive" password## SECRET-DATA
"ftp://[email protected]:/archive" password "$9..."; ## SECRET-DATA
.
Referring to the exhibit, where are the configuration backup files stored?
- A. Files are storedto the SCP site but if the transfer fails, then to theFTP site.
- B. Files are storedto the SCP site and the FTP site simultaneously.
- C. Files are storedto any site as selected by Junos internally.
- D. Files are storedto the SCP site and the FTP site in a round-robinmanner.
Answer: B
Explanation:
In Junos OS, thearchivalconfiguration under[edit system]allows for the automatic backup of configuration files to designated locations upon commit. When multiplearchive-sitesare specified, as shown in the exhibit with both SCP and FTP sites listed, the device does not choose between them or use them in a round-robin manner. Instead, it attempts to transfer the configuration backup files to all specified sites simultaneously upon each commit. This ensures redundancy and increases the likelihood that a backup will be successfully stored even if one of the transfer methods or destinations fails.
NEW QUESTION # 68
Your router has a route to the 10.1.1.0/24 network with a next hop of r jet.
In this scenario, which action will your router perform when traffic destined to the 10.1.1.0/24 network is received?
- A. The traffic will be discarded and an ICMP unreachable message will be sent to the destination of the traffic.
- B. The traffic will be redirected using a default route.
- C. The traffic will be silently discarded.
- D. The traffic will be discarded and an ICMP unreachable message will be sent to the source of the traffic.
Answer: C
Explanation:
In a scenario where a router has a route to a specific network (in this case, 10.1.1.0/24) with a next hop that is unreachable or incorrectly specified (e.g., "r jet" seems to be a typo or an undefined entity), the router will typically discard the traffic destined for that network. This action is taken because the router cannot determine a valid path to forward the traffic. Unlike some scenarios where the router might generate an ICMP (Internet Control Message Protocol) unreachable message, in many configurations, especially in production networks, the traffic might be silently discarded without providing feedback to the sender, as generating ICMP messages for all undeliverable packets could lead to additional network congestion and potential security concerns.
NEW QUESTION # 69
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