Download Juniper JN0-105 Exam Dumps to Pass Exam Easily in 2024
Get 100% Real Free JNCIA JN0-105 Sample Questions
Juniper JN0-105 Exam Syllabus Topics:
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
| Topic 5 |
|
NEW QUESTION # 23
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 poiicy2 routing policy.
- B. Thestaticrouteisevaluated by the poiicy3 routing policy.
- C. Thestaticrouteisrejected by the policyl routing policy.
- D. Thestaticrouteisrejected by the default routing policy.
Answer: A
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 # 24
Which two addresses are included in an Ethernet frame header? (Choose two.)
- A. destination IP address
- B. source IP address
- C. source MAC address
- D. destination MAC address
Answer: C,D
Explanation:
An Ethernet frame header includes the source MAC address (B) and the destination MAC address (D). These addresses are used to deliver the frame from one Ethernet device to another directly connected Ethernet device on the same network segment. Ethernet frames do not include IP addresses, as those are part of the IP packet encapsulated within the Ethernet frame.
NEW QUESTION # 25
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. BGP local preference value
- B. OSPF metric value
- C. outgoing interface name
- D. next hop MAC address
- E. next hop IP address
Answer: C,D,E
Explanation:
The forwarding table in a network device requires specific information to efficiently forward traffic toward its destination. This includes the next hop IP address, which indicates the next router or device in the path to the destination. The outgoing interface name identifies the physical or logical interface through which the packet should be sent to reach the next hop. Lastly, the next hop MAC address is crucial for Layer 2 forwarding decisions, allowing the device to encapsulate the IP packet in a frame that can be understood by Ethernet or other Layer 2 protocols. OSPF metric values and BGP local preference values are used in the routing decision process to select the best path and populate the forwarding table but are not directly used by the forwarding table to forward traffic.
NEW QUESTION # 26
What is the maximum number of rollback configuration files that the Junos OS will store?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
Junos OS can store up to 50 rollback configuration files, making B the correct answer. These rollback files allow administrators to revert to previous configurations, providing a safety net that facilitates recovery from configuration errors or undesired changes
NEW QUESTION # 27
Which two statements are correct about MAC addresses? (Choose two.)
- A. Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.
- B. The MAC address identifies the physical hardware.
- C. The source and destination MAC addresses always remains static to the final destination.
- D. Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.
Answer: A,B
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 # 28
Click the Exhibit button.
Referring the exhibit, what does the highlighted number indicate?
- A. hop count is 5
- B. route preference is 5
- C. cost is 5
- D. metric is 5
Answer: B
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 # 29
Which two statements describe the result when you enter? at the command-line prompt? (Choose two.)
- A. It lists the available commands and options.
- B. It lists tips for the help menu.
- C. It displays help about a text string contained in a statement.
- D. It displays summary information about the commands and options.
Answer: A,D
Explanation:
When you enter ? at the command-line prompt in Junos OS, the system provides assistance in two significant ways. Firstly, it lists the available commands and options that can be used at the current point in the command hierarchy, aiding users in understanding what commands they can execute next. Secondly, it displays summary information about those commands and options, providing brief descriptions or additional context that can help users understand the function of each command or option. This feature is particularly useful for learning the command structure or for quick reference when specific command syntax is forgotten.
NEW QUESTION # 30
Exhibit
{hold:node0}[edit]
root# set system root-authentication ?
Possible completions:
+ apply-groups Groups from which to inherit configuration data
+ apply-groups-except Don't inherit configuration data from these groups encrypted-password Encrypted password string load-key-file File (URL) containing one or more ssh keys plain-text-password Prompt for plain text password (autoencrypted)
> ssh-dsa Secure shell (ssh) DSA public key string
> ssh-rsa Secure shell (ssh) RSA public key string
{hold:node0}[edit]
root# set system root-authentication plain-text-password
New password:
Retype new password:
{hold:node0}[edit]
root# commit and-quit
[edit interfaces]
'ge-0/0/0'
HA management port cannot be configured
error: configuration check-out failed
{hold:node0}[edit]
root#
You are unable to remotely access your Juniper device using the CLI.
Referring to the exhibit, which command would you add to the existing configuration to enable remote CLI access?
- A. load factory-default
- B. set system services ssh
- C. set system root-authentication plain-text-password
- D. set system login idle-timeout 20
Answer: B
Explanation:
In Junos OS, remote access to the device's CLI is commonly facilitated through Secure Shell (SSH), a protocol providing secure command-line access over an insecure network. The given exhibit indicates an attempt to set a root authentication password but does not show configuration for enabling remote access services. To enable SSH, which is not shown in the configuration snippet, you need to configure the device to accept SSH connections. This is done by enabling the SSH service within the system services hierarchy of the configuration. The correct command to add to the existing configuration for enabling remote CLI access via SSH isset system services ssh. This command activates the SSH service, allowing secure remote logins to the device.
NEW QUESTION # 31
What is a benefit of using J-Web?
- A. It provides console-based management.
- B. It provides more advanced features than the CLI.
- C. It provides a customizable dashboard.
- D. It simultaneously manages multiple devices.
Answer: C
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 # 32
Which two statements are correct about firewall filters? (Choose two.)
- A. There can be multiple firewall filters.
- B. There can be only one firewall filter.
- C. "Discard" is the default action of packets that are not explicitly allowed.
- D. "Accept" is the default action of packets that are not explicitly allowed.
Answer: A,C
Explanation:
In Juniper Networks devices, firewall filters are used to control packet flow through the device. The default action for packets that do not match any of the specified criteria in the firewall filter is to discard them, enhancing network security by ensuring that only explicitly allowed traffic can pass through. Furthermore, it is possible to configure multiple firewall filters on a device, allowing for granular control over traffic based on various criteria such as source, destination, and protocol type.
NEW QUESTION # 33
What is the protocol data unit (PDU) of the Data Link Layer?
- A. segment
- B. byte
- C. bit
- D. frame
Answer: D
Explanation:
In the OSI model, the Data Link Layer is responsible for node-to-node delivery of data. It frames the packets received from the Network Layer and prepares them for physical transmission. The Protocol Data Unit (PDU) for the Data Link Layer is called a "frame." Frames encapsulate the network layer packets, adding a header and a trailer that include the hardware addresses of the source and destination, among other things, facilitating the data link layer services like frame synchronization, flow control, and error checking.
NEW QUESTION # 34
Which two statements are true about the Junos OS? (Choose two.)
- A. Exception traffic is sent to the control plane.
- B. Routing tables are stored in the control plane.
- C. Exception traffic is never sent to the control plane.
- D. Routing tables are stored in the forwarding plane.
Answer: A,B
Explanation:
In Junos OS, as with many network operating systems, the control plane is responsible for processes that determine how to route traffic. This includes maintaining routing tables, which store information about network paths and protocols. Therefore, routing tables are indeed stored in the control plane.
Exception traffic refers to packets that cannot be processed by the normal fast-path processing of the Packet Forwarding Engine (PFE) in the forwarding plane, and thus are sent to the control plane for further processing. This might include packets destined for the router itself, packets that need to be fragmented, or packets that match certain firewall filter criteria, among other reasons.
Routing tables are not stored in the forwarding plane. However, the forwarding plane contains the forwarding table (sometimes referred to as the forwarding information base or FIB), which is a distilled version of the routing table optimized for fast packet forwarding. The forwarding plane uses this information to perform the actual transfer of packets across the network device interfaces.
NEW QUESTION # 35
Which two external authentication methods does Junos support for administrative access? (Choose two.)
- A. TACACS+
- B. NIS
- C. RADIUS
- D. ACE
Answer: A
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 # 36
Which two statements are correct regarding Layer 2 network switches? (Choose two.)
- A. Switches flood broadcast traffic.
- B. Switches are susceptible to traffic loops.
- C. Switches create a single collision domain.
- D. Switches do not learn MAC addresses.
Answer: A,B
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 # 37
What does the user@router> clear log ospf-trace command accomplish?
- A. The ospf-trace file is deleted.
- B. Data in the ospf-trace file is removed and logging continues.
- C. Trace parameters are removed from the OSPF protocol configuration.
- D. Logging data into ospf-trace is stopped.
Answer: B
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 # 38
Which criteria does the Junos OS use to select an active route when two entries exist in the routing table?
- A. the most recently learned dynamic route
- B. the route with the highest preference number
- C. the route with the highest metric
- D. the route with the lowest preference number
Answer: D
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 # 39
Which command displays all IPv6 routes in the default routing instance?
- A. show route table inet.0
- B. show route table inet.1
- C. show route table inet6.1
- D. show route table inet6.0
Answer: D
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 # 40
......
JN0-105 Study Guide Realistic Verified Dumps: https://topexamcollection.pdfvce.com/Juniper/JN0-105-exam-pdf-dumps.html