[Apr-2024] Free JN0-105 Exam Questions JN0-105 Actual Free Exam Questions
Verified JN0-105 dumps and 98 unique questions
NEW QUESTION # 13
Which command displays all IPv6 routes in the default routing instance?
- A. showroute table inet6.1
- B. showroute table inet6.0
- C. showroute table inet.l
- D. showroute table inet.0
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 # 14
What are two advantages of using the Junos OS? (Choose two.)
- A. It supports up to a maximum of two previous configurations.
- B. It enables you to roll back to a previous configuration.
- C. It is modular.
- D. It pushes your configuration changes "live" immediately.
Answer: B,C
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 # 15
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. BGP local preference value
- B. outgoing interface name
- C. next hop MAC address
- D. next hop IP address
- E. OSPF metric value
Answer: B,C,D
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 # 16
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. set interface ge-0/0/0 unit 0 family inet
- B. run show interface terse
- C. show interface ge-0/0/0
- D. request system shutdown
Answer: C
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 # 17
Which two fields are you required to enter when you create a new user account? (Choose two.)
- A. user ID
- B. full name
- C. username
- D. login class
Answer: C,D
Explanation:
In Junos OS, when creating a new user account, the minimum required fields are theusernameand thelogin class. The username is the identifier for the account, while the login class specifies the level of access or permissions the user has on the device. Login classes allow for the differentiation between various roles, such as read-only access or full administrative rights. Other information, such as full name or user ID, is optional and not strictly necessary for the creation of a functional user account.
NEW QUESTION # 18
What information does the forwarding table require so that the device forwards traffic? (Choose three.)
- A. BGP local preference value
- B. outgoing interface name
- C. next hop MAC address
- D. next hop IP address
- E. OSPF metric value
Answer: B,C,D
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 # 19
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. The candidate configuration is locked.
- C. The candidate configuration is unlocked.
- D. Other users can enter configuration mode.
Answer: A
Explanation:
When a user enters configuration mode using theconfigure exclusivecommand on a Junos device, the candidate configuration is locked for that user, preventing other users from making concurrent configuration changes. This exclusive lock ensures that only one user can make changes at a time, preventing conflicts and potential errors from simultaneous modifications. Other users attempting to enter configuration mode while it is locked will receive a notification that the configuration is currently being edited by another user.
NEW QUESTION # 20
Which process in the Junos OS is responsible for device management tasks including the CLI and commit operations?
- A. rpd
- B. dcd
- C. chassisd
- D. mgd
Answer: D
Explanation:
In Junos OS, the management daemon (mgd) is responsible for handling all the device management tasks, including processing CLI commands and handling commit operations. The mgd daemon interacts with the Junos OS configuration database and provides the necessary logic to ensure that configuration changes are syntactically correct and do not conflict with each other. When a user commits a configuration, mgd validates the changes, applies them to the running configuration, and ensures that the necessary daemons are notified of the changes to apply them accordingly.
NEW QUESTION # 21
What are two attributes of the UDP protocol? (Choose two.)
- A. UDP is always slower than TCP.
- B. UDP is connectionless.
- C. UDP is more reliable than TCP.
- D. UDP is best effort.
Answer: B,D
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 # 22
When considering routing policies, which two statements are correct? (Choose two.)
- A. Policy terms are evaluated from top to bottom with the most restrictive action taken of all the matching terms.
- B. Routing policies are applied to interfaces as input or export filters.
- C. Policy terms are evaluated from top to bottom with action taken on the first match found.
- D. An import routing policy for BGP determines which received prefix advertisements are placed in the routing information base.
Answer: C,D
Explanation:
Routing policies in Junos OS are crucial for controlling route advertisements and path selection. The correct answers are B and C. An import routing policy for BGP determines which received prefix advertisements are placed in the routing information base (RIB), and policy terms are evaluated from top to bottom, with action taken on the first match found. This sequential evaluation allows for precise control over routing decisions.
NEW QUESTION # 23
Which character is used to filter the command output in the Junos CLI?
- A. >
- B. ?
- C. |
- D. <
Answer: C
Explanation:
In the Junos CLI, the pipe character | is used as a filter operator to refine command output. This operator can be combined with various filtering commands like match, except, count, etc., to display only the relevant portions of the command output. For example, using | match <pattern> filters the output to show only the lines that contain the specified pattern, making it easier to find specific information within extensive command output. This functionality is especially useful in managing and troubleshooting complex configurations and network states, allowing for more efficient analysis of the device's operational status and configuration details.
NEW QUESTION # 24
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. names
- C. tags
- D. defaults
Answer: C
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 # 25
Click the Exhibit button.
Referring to the exhibit, what should be configured on R1 to advertise a default static route into OSPF?
- A. a management interface
- B. a routing policy
- C. a firewall filter
- D. a loopback interface
Answer: B
Explanation:
To advertise a default static route into OSPF on router R1, a routing policy should be configured. This policy would typically include a statement to match the default route (0.0.0.0/0) and then apply an action to set the route as an OSPF external type, which would then be redistributed into the OSPF domain. The routing policy is a set of conditions and actions that determine how routes are imported into or exported from the routing table and how routes are shared between routing instances or routing protocols. After defining the policy, it must be applied to OSPF under the export section of the OSPF configuration on R1. This process will allow R1 to announce the default route to other OSPF routers in the network, which then can use it as a gateway of last resort to reach the Internet or other networks not explicitly known to the OSPF domain.
NEW QUESTION # 26
What information would you find using the CLI help command?
- A. hyperlinks for remediation actions
- B. message of the day
- C. a URL for accessing the technical documentation
- 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 # 27
Exhibit.
Referring to the exhibit, which routing configuration is required for these two users to access the remote server?
- A. A routing protocol must be enabled on the router.
- B. Users and the server require a default gateway.
- C. Trunk ports must be enabled on the switch.
- D. Users must connect directly to the router.
Answer: B
Explanation:
In a typical network configuration, users and servers require a default gateway to communicate with devices on different networks or subnets. The default gateway is usually the router's interface on the same network, which routes the traffic to other networks. This is essential for the two users to access the remote server if the server is on a different subnet, which is indicated by the different network addresses.
NEW QUESTION # 28
Which protocol would you configure to synchronize the time and date on a Junos device?
- A. NMP
- B. RIP
- C. SNMP
- D. NTP
Answer: D
Explanation:
The Network Time Protocol (NTP) is designed to synchronize the clocks of computers over a network.
Configuring NTP on a Junos device ensures that its clock is set accurately, which is crucial for logging, troubleshooting, and maintaining the integrity of time-sensitive operations and security protocols. NTP allows devices to use a hierarchy of time sources, from primary servers synchronized to a reference clock (such as an atomic clock or GPS time) to secondary servers that distribute the time to other devices on the network.
NEW QUESTION # 29
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 and the FTP site simultaneously.
- B. Files are storedto the SCP site and the FTP site in a round-robinmanner.
- C. Files are storedto the SCP site but if the transfer fails, then to theFTP site.
- D. Files are storedto any site as selected by Junos internally.
Answer: A
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 # 30
What are two types of transit traffic that traverse the forwarding plane of a Layer 3 router? (Choose two.)
- A. broadcast traffic
- B. multicast traffic
- C. exception traffic
- D. unicast traffic
Answer: B,D
Explanation:
Transit traffic that traverses the forwarding plane of a Layer 3 router includes both unicast and multicast traffic types. Unicast traffic is directed from a single source to a single destination, while multicast traffic is sent from one source to multiple destinations that are part of a multicast group. These types of traffic are efficiently routed through the network by leveraging the router's forwarding plane capabilities. Exception traffic, which requires special handling by the control plane, and broadcast traffic, which is typically limited to a single broadcast domain and not usually forwarded by Layer 3 routers, are not considered standard types of transit traffic for the forwarding plane of a router.
NEW QUESTION # 31
Which two statements about firewall filters are correct? (Choose two.)
- A. Firewall filters can match Layer 7 parameters.
- B. Firewall filters are stateful.
- C. Firewall filters can match Layer 4 parameters.
- D. Firewall filters are stateless.
Answer: C,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 # 32
By default, how does the PFE manage unicast traffic destined for an existing forwarding table entry?
- A. It sends the traffic through the f xpl interface to the RE.
- B. It sends the traffic through one port toward its destination.
- C. It sends all traffic to the control plane for further processing.
- D. It sends the traffic through multiple ports toward its destination.
Answer: B
Explanation:
In a Juniper Networks device, the Packet Forwarding Engine (PFE) processes unicast traffic by forwarding it according to the existing entries in the forwarding table. When the PFE encounters unicast traffic destined for an address that has a corresponding entry in the forwarding table, it directs the traffic through a specific outgoing interface or port toward its destination. This process is based on the most efficient path determined by the routing protocols in use, ensuring that the packet reaches its intended destination through a singular path, unless specific configurations such as load balancing are in place.
NEW QUESTION # 33
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 learn everything about the subnets and best paths within your network.
- D. IGPs automatically distribute static routing information.
- E. IGPs determine the optimal paths for data transmission.
Answer: A,C,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 # 34
Which two statements are correct about Junos traceoptions? (Choose two.)
- A. Traceoptions cannot be enabled in a production environment.
- B. Traceoptions are enabled by default.
- C. Traceoption output, by default, is stored in /var/iog/<fiie-name>.
- D. Traceoptions are enabled through configuration.
Answer: C,D
Explanation:
Traceoptions in Junos OS are used for detailed debugging and troubleshooting of protocols and processes within the system. They are not enabled by default due to the potential performance impact and volume of data generated. Instead, traceoptions are enabled through specific configuration settings under the relevant protocol or process hierarchy. This allows administrators to target their troubleshooting efforts and control the scope of logging. By default, the output generated by traceoptions is stored in files located in the /var/log directory, with the file name typically specified in the traceoptions configuration. This structured approach to logging and debugging helps in diagnosing complex issues without overwhelming the system or the administrator with irrelevant data.
NEW QUESTION # 35
An administrator configures a router's interface with an IPv4 address and subnet mask. The administrator also confirms that this interface is in an up state.
In this scenario, which two route types are created on the local router? (Choose two.)
- A. a direct route
- B. a static route
- C. a local route
- D. a dynamic route
Answer: A,C
Explanation:
When an interface on a router is configured with an IPv4 address and is in an up state, two types of routes are automatically created in the routing table: a local route and a direct route, making B and D the correct answers.
The local route represents the interface's IP address itself, indicating that the router can directly receive packets addressed to this IP. The direct route represents the subnet or network segment to which the interface is connected, indicating that the router can directly forward packets to destinations within this subnet.
NEW QUESTION # 36
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