Get New 2024 Valid Practice To your JN0-105 Exam (Updated 101 Questions)
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Juniper JN0-105 Exam Syllabus Topics:
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NEW QUESTION # 15
What are two attributes of the UDP protocol? (Choose two.)
- A. UDP is more reliable than TCP.
- B. UDP is best effort.
- C. UDP is connectionless.
- D. UDP is always slower than TCP.
Answer: B,C
Explanation:
UDP (User Datagram Protocol) is known for being connectionless (D) and providing best-effort delivery without the reliability mechanisms present in TCP (C). This means that UDP does notestablish a connection before sending data and does not guarantee delivery, order, or error checking, making it faster but less reliable than TCP.
NEW QUESTION # 16
In the Junos OS, which keyboard shortcut allows you to move to the start of the line?
- A. Ctrl+e
- B. Ctrl+k
- C. Ctrl+a
- D. Ctrl+w
Answer: C
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 # 17
What information would you find using the CLI help command?
- A. hyperlinks for remediation actions
- B. an explanation for specific system log error messages
- C. a URL for accessing the technical documentation
- D. message of the day
Answer: B
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 # 18
Which command displays all IPv6 routes in the default routing instance?
- A. showroute table inet.0
- B. showroute table inet6.1
- C. showroute table inet.l
- D. showroute table inet6.0
Answer: D
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 # 19
How many rescue configuration files are supported on a Junos device?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
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.
In Junos OS, each device supports only one rescue configuration file. The rescue configuration is a specific configuration that can be saved and later retrieved if needed. This is used as a fallback configuration that you know works and can be applied in case of an emergency or if the current configuration has issues.
Reference:
"You can create a rescue configuration file by using the request system configuration rescue save operational mode command. Each Junos OS device can have only one rescue configuration file."
NEW QUESTION # 20
Which process in the Junos OS is responsible for maintaining routing protocols and tables?
- A. chassisd
- B. dcd
- C. rpd
- D. mgd
Answer: C
Explanation:
The Routing Protocol Daemon (rpd) in Junos OS is responsible for maintaining routing protocols and tables. It handles all routing information, including the calculation of routes and the population of the routing table, making it crucial for dynamic routing operations.
NEW QUESTION # 21
Which type of device uses the destination IP address to forward packets?
- A. Layer 2 switch
- B. hub
- C. repeater
- D. Layer 3 router
Answer: D
Explanation:
A Layer 3 router forwards packets based on the destination IP address. It operates at the network layer of the OSI model and uses routing tables to determine the best path for packet delivery. Unlike Layer 2 switches, which forward packets based on MAC addresses, routers handle logical addressing, making them crucial for inter-network communication.
Reference:
Junos OS Documentation on Routing Fundamentals.
NEW QUESTION # 22
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. reinstalling Junos
- B. loading the factory-default configuration
- C. configuring a non-root username and password
- D. configuring a password for the root account
Answer: D
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 the set 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 # 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. The static route is rejected by the default routing policy.
- B. The static route is evaluated by the poiicy2 routing policy.
- C. The static route is evaluated by the poiicy3 routing policy.
- D. The static route is rejected by the policyl routing policy.
Answer: B
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 statements are correct about the empioyee@Ri> prompt? (Choose two.)
- A. You are in configuration mode.
- B. You are at a shell prompt.
- C. You are in operational mode.
- D. R1 is the hostname of your device.
Answer: C,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 # 25
Exhibit
user@router> show route 192.168.36.1
inet.O: 5 destinations, 6 routes (5 active, 0 holddown, 0 hidden) + = Active Route, - = Last Active, * = Both
192.168.36.1/32 *[Static/5] 00:00:31
> to 10.1.1.2 via ge-0/0/10.0 [OSPF/IO] 00:02:21, metric 1 > to 10.1.1.2 via ge-0/0/10.0 Referring to the exhibit, which route(s) will be selected by Junos for packet forwarding?
- A. The OSPF route will be selected.
- B. The Junos OS selects both routes.
- C. The Junos OS randomly selects one route.
- D. The static route will be selected.
Answer: D
Explanation:
Junos OS selects routes based on the route preference (also known as administrative distance). Static routes typically have a lower route preference than OSPF routes, meaning they are more preferred. Since the static route to 192.168.36.1/32 is shown with a preference of 5, it will be selected over the OSPF route for packet forwarding, assuming no other factors such as route filters or policies affect the routing decision.
NEW QUESTION # 26
Which layer of the OSI model contains the IP address information?
- A. Layer 4
- B. Layer 2
- C. Layer 1
- D. Layer 3
Answer: D
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 # 27
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 stored to the SCP site and the FTP site simultaneously.
- B. Files are stored to the SCP site and the FTP site in a round-robin manner.
- C. Files are stored to any site as selected by Junos internally.
- D. Files are stored to the SCP site but if the transfer fails, then to the FTP site.
Answer: A
Explanation:
In Junos OS, the archival configuration under [edit system] allows for the automatic backup of configuration files to designated locations upon commit. When multiple archive-sites are 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 # 28
A network administrator is attempting to route traffic on a Juniper switch to one of three different VLANs: Prod, Test, and Dev. Each VLAN has been assigned a numerical value.
In this scenario, what are these numerical values called?
- A. interfaces
- B. tags
- C. defaults
- D. names
Answer: B
Explanation:
In the context of VLANs (Virtual Local Area Networks) on a Juniper switch, the numerical values assigned to each VLAN, such as those for Prod, Test, and Dev, are known as VLAN tags. These tags are part of the 802.1Q VLAN standard, which allows multiple VLANs to coexist on a single physical network. Each tag uniquely identifies the VLAN to which a frame belongs, enabling the switch to segregate and manage traffic based on VLAN membership. This tagging mechanism allows for efficient traffic separation and management, ensuring that devices within one VLAN do not receive traffic intended for another, thus maintaining network security and efficiency.
NEW QUESTION # 29
What will the request system configuration rescue save command do?
- A. It activates the rescue configuration.
- B. It saves a configuration version prior to the configuration most recently committed as the rescue configuration.
- C. It saves the candidate configuration as the rescue configuration.
- D. It saves the most recently committed configuration as the rescue configuration.
Answer: D
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 # 30
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