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NEW QUESTION # 45
You want to redeploy a Junos device by clearing the existing configuration and resetting it to factory defaults.
In this scenario, which command would help to accomplish this task?
- A. request systemstorage cleanup dry-run
- B. show system storage
- C. request systemzeroize media
- D. request systemstorage cleanup
Answer: C
Explanation:
Therequest system zeroize mediacommand on a Junos device securely erases all data, including configuration and log files, and resets the device to its factory default settings. This command is used when redeploying a device to ensure no residual data remains from its previous deployment. It's a comprehensive and secure way to clear all configurations and data, making the device as if it were new. The other commands listed do not perform a full reset to factory defaults; for example,show system storagedisplays storage information, andrequest system storage cleanupoffers to delete unnecessary files without resetting the device to factory settings.
NEW QUESTION # 46
Exhibit
term limit-icmp { from {
source-address {
172.25.11.0/24;
}
protocol icmp;
}
then {
count count-icmp; discard;
}
}
Referring to the exhibit, which two actions will occur when a packet matches the firewall filter? (Choose two.)
- A. The packet will be discarded.
- B. The packet will be forwarded.
- C. An ICMP destination unreachable message will be returned.
- D. A counter will be incremented.
Answer: A
Explanation:
Referring to the firewall filter configuration in the exhibit, when a packet matches the specified term limit-icmp, two actions are defined in thethenstatement:count count-icmpanddiscard. Thecount count-icmp action means that each time a packet matches this term, a counter namedcount-icmpwill be incremented, providing a tally of how many packets have matched the term. Thediscardaction means that the packet will be dropped and not forwarded through the device. This effectively prevents the packet from reaching its intended destination. There is no action specified that would cause an ICMP destination unreachable message to be returned, nor is there any action that would allow the packet to be forwarded.
NEW QUESTION # 47
Which two statements are correct about MAC addresses? (Choose two.)
- A. The MAC address identifies the physical hardware.
- B. The source and destination MAC addresses always remains static to the final destination.
- C. Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.
- D. Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.
Answer: A,C
Explanation:
MAC (Media Access Control) addresses are unique identifiers assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used to identify the physical hardware on a network. In the context of Ethernet switches, the destination MAC address in incoming frames is used to determine the appropriate output port for forwarding the frame towards its final destination. The switch does not change the destination MAC address; it uses the MAC address to make forwarding decisions within the local network segment.
NEW QUESTION # 48
Which component is considered part of the data plane?
- A. the Packet Forwarding Engine
- B. the power supply
- C. the fan tray
- D. the Routing Engine
Answer: A
Explanation:
The Packet Forwarding Engine (PFE) is an integral component of Juniper Networks devices, responsible for the data plane operations. The data plane, also known as the forwarding plane, is where the actual processing and forwarding of packets occur based on the routing and forwarding tables. The PFE executes the forwarding decisions made by the Routing Engine (RE), handling all packet transmissions, including routing, filtering, and switching packets towards their destination. This contrasts with the control plane operations handled by the RE, which involve routing table maintenance, system management, and control protocol processing.
NEW QUESTION # 49
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. Each user gets their own candidate configuration.
- C. A commit will not succeed until there is only a single user in configuration mode.
- D. A commit by any user will commit changes made by all active users.
Answer: B
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 # 50
Which type of device uses the destination IP address to forward packets?
- A. Layer 2 switch
- B. repeater
- C. hub
- D. Layer 3 router
Answer: D
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 # 51
You are asked to convert the number 7 from decimal to binary.
Which number is correct in this scenario?
- A. 0
- B. 00000111
- C. 00010000
- D. 00001000
Answer: B
Explanation:
To convert the decimal number 7 to binary, the correct representation is 00000111 (C). In binary, 7 is represented as 1+2+4 (2^0 + 2^1 + 2^2), which corresponds to the last three digits being 1 in the binary format, with leading zeros added for clarity.
NEW QUESTION # 52
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 # 53
You are trying to diagnose packet loss at interface ge-0/0/3.
In this scenario, which command would help you view error statistics in real time?
- A. show interface terse
- B. show interface ge-0/0/3
- C. monitor interface traffic
- D. monitor interface ge-0/0/3
Answer: D
Explanation:
Themonitor interface ge-0/0/3command is used in Junos OS to view real-time statistics for a specific interface. This command helps in diagnosing issues like packet loss by displaying real-time updates of traffic and error statistics for the specified interface.
NEW QUESTION # 54
Which three benefits occur when operating an interior gateway protocol (IGP) in an autonomous system (AS)?
(Choose three.)
- A. IGPs react very fast to network change.
- B. IGPs learn prefixes in the global Internet's routing table.
- C. IGPs automatically distribute static routing information.
- D. IGPs determine the optimal paths for data transmission.
- E. IGPs learn everything about the subnets and best paths within your network.
Answer: A,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 # 55
When considering routing tables and forwarding tables, which two statements are correct? (Choose two.)
- A. The forwarding table stores all routes and prefixes from all protocols.
- B. The routing table is used by the RE to select the best route.
- C. The forwarding table is used by the RE to select the best route.
- D. The routing table stores all routes and prefixes from all protocols.
Answer: B,D
Explanation:
The routing table and forwarding table play distinct roles in a Junos OS device. The correct answers are A and D. The routing table (A) is used by the Routing Engine (RE) to select the best route among all the learned routes, while the routing table (D) stores all routes and prefixes learned from all routing protocols. The forwarding table, in contrast, contains only the active routes chosen by the RE and is used by the Packet Forwarding Engine for actual packet forwarding.
NEW QUESTION # 56
Which command displays all IPv6 routes in the default routing instance?
- A. show route table inet6.0
- B. show route table inet6.1
- C. show route table inet.1
- D. show route table inet.0
Answer: A
Explanation:
The show route table inet6.0 command displays all IPv6 routes in the default routing instance. In Junos OS, the routing table for IPv6 addresses is referred to as inet6.0, whereas inet.0 is used for IPv4 unicast routes. The other options do not correspond to the correct IPv6 routing table.
Reference:
Juniper official documentation: Junos OS Routing Tables Overview.
NEW QUESTION # 57
Which two actions happen when multiple users issue the configure exclusive command to enter configuration mode on a Junos device? (Choose two.)
- A. Other users cannot enter configuration mode.
- B. Other users can enter configuration mode.
- C. The candidate configuration is unlocked.
- D. The candidate configuration is locked.
Answer: A,D
Explanation:
In Junos OS, when a user issues the configure exclusive command, it locks the candidate configuration for that user, preventing other users from making concurrent configuration changes. This exclusive lock ensures that configuration changes are managed in a controlled manner, reducing the risk of conflicting changes. As a result, while one user is in exclusive configuration mode, other users are prevented from entering configuration mode until the lock is released, either by the user committing the changes or exiting configuration mode.
NEW QUESTION # 58
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. Trunk ports must be enabled on the switch.
- C. Users and the server require a default gateway.
- D. A routing protocol must be enabled on the router.
Answer: C
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.
NEW QUESTION # 59
Which two statements are true about the PFE? (Choose two.)
- A. The PFE handles all processes that control the chassis components.
- B. The PFE implements various services such as policing, stateless firewall filtering, and class of service.
- C. The PFE uses Layer 2 and Layer 3 forwarding tables to forward traffic toward its destination.
- D. The PFE is responsible for performing protocol updates and system management.
Answer: B,C
Explanation:
The Packet Forwarding Engine (PFE) in Juniper Networks devices is the heart of the data plane, handling the actual forwarding of packets based on pre-computed forwarding tables. It provides several critical services to manage and control traffic flow, including policing (to enforce bandwidth limits for certain traffic types), stateless firewall filtering (to permit or deny traffic based on predefined criteria), and Class of Service (CoS) (to prioritize traffic to ensure quality of service for critical applications). The PFE utilizes both Layer 2 (MAC addresses) and Layer 3 (IP addresses) forwarding tables to make intelligent forwarding decisions, ensuring that packets are efficiently routed toward their final destination.
NEW QUESTION # 60
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