Juniper JN0-105 Certification Exam Dumps with 98 Practice Test Questions
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NEW QUESTION # 10
In the Junos OS, which keyboard shortcut allows you to move to the start of the line?
- A. Ctrl+k
- B. Ctrl+a
- C. Ctrl+w
- D. Ctrl+e
Answer: B
Explanation:
In the Junos OS command-line interface (CLI), the keyboard shortcut Ctrl+a is used to move the cursor to the start of the line. This is a common convention in many command-line environments and text editors, providing a quick way to navigate to the beginning of the current command or line of text without having to use the arrow keys. This can be particularly useful for making quick edits to commands or for navigating long lines of text more efficiently.
NEW QUESTION # 11
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 displays summary information about the commands and options.
- C. It lists tips for the help menu.
- D. It displays help about a text string contained in a statement.
Answer: A,B
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 # 12
What information would you find using the CLI help command?
- A. a URL for accessing the technical documentation
- B. hyperlinks for remediation actions
- C. message of the day
- D. an explanation for specific system log error messages
Answer: D
Explanation:
The CLI help command in Junos OS provides assistance and explanations for commands, command options, and in some cases, specific system log error messages. By using the help command followed by specific keywords or messages, users can get detailed information and context for the commands they are using or errors they are encountering. This feature is particularly useful for understanding the purpose of commands, their syntax, and troubleshooting error messages that may appear in system logs.
NEW QUESTION # 13
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 path is the only active route.
- B. The OSPF path is the only active route.
- C. The BGP route is preferred over the OSPF route.
- D. / Traffic is load-balanced across two routes.
Answer: B
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 # 14
What are two examples of exception traffic? (Choose two.)
- A. ping to the local device
- B. routing updates
- C. log messages
- 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 # 15
Which Junos feature limits the amount of exception traffic that is sent from the PFE to the RE?
- A. routing policy
- B. CoS markings
- C. policer
- D. scheduler
Answer: C
Explanation:
In Junos OS, a policer is a feature used to limit the rate of traffic flow in the network, including exception traffic sent from the Packet Forwarding Engine (PFE) to the Routing Engine (RE). Exception traffic consists of packets that cannot be processed by the PFE alone and requireintervention by the RE, such as control packets or packets destined for the device itself. A policer can be configured to enforce bandwidth limits and drop or mark packets that exceed specified rate limits, thus protecting the RE from being overwhelmed by excessive exception traffic.
NEW QUESTION # 16
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 # 17
You have logged on to a Junos device and are at the operational mode prompt.
Which two commands are used at this prompt? (Choose two.)
- A. show interface ge-0/0/0
- B. request system shutdown
- C. set interface ge-0/0/0 unit 0 family inet
- D. run show interface terse
Answer: A
Explanation:
At the operational mode prompt on a Junos device, you can use various commands to view the device's status and request system operations. The show interface ge-0/0/0 command is used to display information about a specific interface, while the request system shutdown command is used to properly shut down the device.
The set command is used in configuration mode, not operational mode, and the run command is used to execute operational mode commands from configuration mode.
NEW QUESTION # 18
Which statement is correct concerning exception traffic processing?
- A. Exception traffic is discarded by the PFE.
- B. Exception traffic is never forwarded.
- C. Exception traffic is rate-limited to protect the RE.
- D. Exception traffic is always dropped during congestion.
Answer: C
Explanation:
Exception traffic refers to packets that the Packet Forwarding Engine (PFE) cannot process normally and must be forwarded to the Routing Engine (RE) for further processing. This includes packets destined for the router itself or packets needing special handling that the PFE cannot provide. To protect the RE from being overwhelmed by such traffic, which could potentially impact the router's control plane functions, exception traffic is rate-limited. This means that there's a threshold to how much exception traffic can be sent to the RE, ensuring that the router's critical management and control functions remain stable and responsive even during high traffic volumes or attacks.
NEW QUESTION # 19
You have logged on to a Junos device and are at the operational mode prompt.
Which two commands are used at this prompt? (Choose two.)
- A. show interface ge-0/0/0
- B. request system shutdown
- C. set interface ge-0/0/0 unit 0 family inet
- D. run show interface terse
Answer: A
Explanation:
At the operational mode prompt on a Junos device, you can use various commands to view the device's status and request system operations. Theshow interface ge-0/0/0command is used to display information about a specific interface, while therequest system shutdowncommand is used to properly shut down the device. The setcommand is used in configuration mode, not operational mode, and theruncommand is used to execute operational mode commands from configuration mode.
NEW QUESTION # 20
Which two statements are true about the candidate configuration? (Choose two.)
- A. Candidate configuration changes are automatically applied.
- B. You can deploy multiple changes at the same time.
- C. Multiple users cannot modify the same candidate configuration.
- D. You can discard changes before committing them.
Answer: B,D
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
Which two statements are correct about the empioyee@Ri> prompt? (Choose two.)
- A. R1 is the hostname of your device.
- B. You are at a shell prompt.
- C. You are in configuration mode.
- D. You are in operational mode.
Answer: A,D
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 # 22
You configured your system authentication order using the set authentication-order tacplus radius password command.
Which statement is correct in this scenario?
- A. All authentication methods are used with the most restrictive permission set used.
- B. A rejection by TACACS+ will prevent a login and bypass the other two authentication methods.
- C. The password authentication method is evaluated if the TACACS+ and RADIUS servers respond with a reject message.
- D. The password authentication will only be used if the TACACS+ and RADIUS servers fail to respond.
Answer: D
Explanation:
In the scenario where the system authentication order is set to "tacplus radius password," the correct statement is (B). If the TACACS+ and RADIUS servers are unreachable or fail to respond, the system will fall back to using password authentication. This ensures that users can still authenticate using locally stored passwords if external authentication servers are unavailable.
NEW QUESTION # 23
Which command displays all IPv6 routes in the default routing instance?
- A. showroute table inet.l
- B. showroute table inet6.0
- C. showroute table inet.0
- D. showroute table inet6.1
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 # 24
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 # 25
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