Juniper JN0-105 Online Practice Questions and Exam Preparation

Juniper JN0-105 Online Questions & Answers

• Question 111:

  What is the name of the volume containing the software and files used for the day-to day operation of a device using Junos with upgraded FreeBSD?

  A. /var
  B. /active
  C. /junos
  D. /oam
  C. /junos

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  Explanation

• Question 112:

  Which two statements describe IPv4 default behavior for BGP? Choose Two

  A. All Active BGP routes are exported to configured EBGP neighbors
  B. All BGP routes are exported to configured EBGP neighbors
  C. All BGP routes are imported into the inet.0 routing table
  D. All BGP routes are imported into the inet4.0 routing table
  A. All Active BGP routes are exported to configured EBGP neighbors
  C. All BGP routes are imported into the inet.0 routing table

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  Explanation

• Question 113:

  Which two statements are correct about MAC addresses? (Choose two.)

  A. Switches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.
  B. Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.
  C. The source and destination MAC addresses always remains static to the final destination.
  D. The MAC address identifies the physical hardware.
  B. Switches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.
  D. The MAC address identifies the physical hardware.

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  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.

• Question 114:

  Which two statements are correct about a Routing Engine? (Choose two.)

  A. It processes CoS marked traffic.
  B. It processes management traffic.
  C. It maintains routing tables.
  D. It forwards transit traffic.
  B. It processes management traffic.
  C. It maintains routing tables.

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  Explanation

  The Routing Engine (RE) in Juniper Networks devices plays a pivotal role in the control plane, handling tasks that are critical for the operation and management of the network. One of its key functions is processing management traffic, which includes user commands, system configuration, and monitoring operations. The RE also maintains routing tables, which are essential for network routing decisions. These tables contain network topology information and routing paths, which the RE uses to update the Packet Forwarding Engine (PFE) so that it can forward packets appropriately. The RE does not forward transit traffic or process Class of Service (CoS) marked traffic, as these tasks are handled by the PFE.

• Question 115:

  What information does the forwarding table require so that the device forwards traffic? (Choose three.)

  A. BGP local preference value
  B. next hop IP address
  C. outgoing interface name
  D. OSPF metric value
  E. next hop MAC address
  B. next hop IP address
  C. outgoing interface name
  E. next hop MAC address

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  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.

• Question 116:

  Which two methods keep a Junos device operational if the primary storage device fails? (Choose two.)

  A. Create a recovery snapshot.
  B. Enable the ephemeral database.
  C. Enable J-Web for device management.
  D. Create a rescue configuration.
  A. Create a recovery snapshot.
  D. Create a rescue configuration.

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  Explanation

• Question 117:

  Which two statements are correct about the inet.0 routing table? (choose two.)

  A. It is used for populating the Ethernet switching table.
  B. It stores information learned from routing protocols and other sources.
  C. It is used for populating the forwarding table.
  D. It is used for populating the forwarding policy.
  B. It stores information learned from routing protocols and other sources.
  C. It is used for populating the forwarding table.

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  Explanation

• Question 118:

  What are two methods for navigating to configuration mode from an operational mode prompt? (Choose two.)

  A. Use the quit command.
  B. Use the configure command.
  C. Use the exit command.
  D. Use the edit command.
  B. Use the configure command.
  D. Use the edit command.

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  Explanation

  In Junos OS, to navigate from operational mode to configuration mode, you can use either the edit or configure command. Both commands move the CLI from operational mode, where you can view the state of the device, to configuration mode, where you can make changes to the device's configuration.

• Question 119:

  You are creating a new policy to accept and redistribute routes into you IGP.

  In this scenario, which match criteria would you use to identify the route prefixes to select?

  A. neighbor
  B. route-filter
  C. instance
  D. route-type
  B. route-filter

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  Explanation

  When creating a new policy to accept and redistribute routes into your Interior Gateway Protocol (IGP), the route-filter match criteria is used to identify the route prefixes to select. The route-filter statement specifies which prefixes should be

  matched in a policy. This allows for precise control over which routes are accepted and redistributed, facilitating efficient and secure routing policies within the network.

  References:

  "show | display set | match ge-0/0/2" indicating command examples and match criteria from Useful Juniper Commands.txt.

  Juniper official documentation: Routing Policy and Firewall Filters Configuration Guide.

• Question 120:

  Refer to the exhibit.

  

  You asked to create a firewall filter to count IPv6 packets that arrive with a no next header value. As shown in the exhibit, you have created and applied the count-no-header firewall filter to the ge-0/0/0 interface. The commit operation fails.

  What is causing this problem?

  A. IPv6 interfaces do not support firewall filters.
  B. The filter name must be different than the counter name.
  C. The firewall term does not include inet6 in the from statement.
  D. The firewall family is not correct.
  D. The firewall family is not correct.

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  Explanation