Juniper JN0-105 Online Practice Questions and Exam Preparation

Juniper JN0-105 Online Questions & Answers

• Question 121:

  What are two configurable physical interface properties? (Choose two.)

  A. MTU
  B. address
  C. protocol family
  D. link mode
  A. MTU
  C. protocol family

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  Explanation

• Question 122:

  What are three firewall filter terminating actions? (Choose three.)

  A. discard
  B. reject
  C. log
  D. accept
  E. drop
  A. discard
  B. reject
  E. drop

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  Explanation

• Question 123:

  Click the Exhibit button.

  

  Referring to the exhibit, which route(s) will be selected by Junos for packet forwarding?

  A. The static route will be selected.
  B. The OSPF route will be selected.
  C. The Junos OS randomly selects one route.
  D. The Junos OS selects both routes.
  A. The static route will be selected.

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  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.

• Question 124:

  You are asked to convert the number 7 from decimal to binary.

  Which number is correct in this scenario?

  A. 00010000
  B. 11100000
  C. 00000111
  D. 00001000
  C. 00000111

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  Explanation

  To convert the decimal number 7 to binary, the correct representation is 00000111. In binary, 7 is represented as 1+2+4 (2^0 + 2^1 + 2^2), which corresponds to the last three digits being 1 in the binary format, with leading zeros added for clarity.

• Question 125:

  You need to recover the root password on a Junos router without losing the current configuration settings.

  Which three statements describe what you should perform in this scenario? (Choose three.)

  A. Enter and commit the new root password.
  B. Load the factory-default configuration.
  C. Upgrade the Junos OS to the latest version.
  D. Hit the space bar and enter recovery when prompted
  E. Hit the space bar and enter recovery when prompted.
  A. Enter and commit the new root password.
  D. Hit the space bar and enter recovery when prompted
  E. Hit the space bar and enter recovery when prompted.

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  Explanation

  To recover the root password on a Junos router without losing the configuration, you should (A) enter and commit the new root password once you have gained access to the system, (D) hit the space bar to interrupt the boot process and enter recovery mode when prompted during the boot process, and (E) use a console connection to reboot the device and access the bootloader prompt. These steps allow you to reset the root password while preserving the existing configuration.

• Question 126:

  Click the Exhibit button.

  

  Which statement is correct regarding the configurration shown in the exhibit?

  A. When the ospf-trace file has created five files, it will stop logging additional information.
  B. When the ospf-trace file reaches the 64 KB file size, it is renamed and begins a new file.
  C. The ospf-trace file will automatically replace any existing trace file with the same name.
  D. Timestamp information will not be included for each line of ospf-trace
  B. When the ospf-trace file reaches the 64 KB file size, it is renamed and begins a new file.

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  Explanation

• Question 127:

  What will the request system configuration rescue save command do?

  A. It saves the candidate configuration as the rescue configuration.
  B. It saves the most recently committed configuration as the rescue configuration.
  C. It saves a configuration version prior to the configuration most recently committed as the rescue configuration.
  D. It activates the rescue configuration.
  B. It saves the most recently committed configuration as the rescue configuration.

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  Explanation

  The request system configuration rescue save command in Junos OS saves the most recently committed configuration as the rescue configuration. This rescue configuration can be used to recover the device if future configurations cause

  issues. It ensures there is a stable, known-good configuration to fall back on, which is crucial in network management and troubleshooting.

  References:

  "rescue : save configurations as the rescue: request system configuration save .................( saves the current configs as a rescue configs )" from Useful Juniper Commands.txt.

  Juniper official documentation: Configuring and Activating a Rescue Configuration.

• Question 128:

  Your network infrastructure transports data, voice, and video traffic. Users are complaining that voice and video calls are not performing to their expectations.

  In this scenario, which technology would you implement to improve voice and video performance on your network?

  A. NAT
  B. IPv6
  C. CoS
  D. STP
  C. CoS

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  Explanation

  In a network that carries diverse types of traffic like data, voice, and video, ensuring the performance of latency-sensitive applications such as voice and video calls is crucial. Class of Service (CoS) is a technology designed to prioritize network traffic, ensuring that critical applications like voice and video receive the necessary bandwidth and minimal latency. CoS mechanisms can include traffic classification, traffic policing, queue management, and scheduling. By implementing CoS, network administrators can assign higher priority to voice and video traffic, thus improving their performance across the network and addressing the users' complaints about call quality.

• Question 129:

  What are two examples of exception traffic? (Choose two.)

  A. ping to the local device
  B. log messages
  C. transit packets
  D. routing updates
  B. log messages
  D. routing updates

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  Explanation

  Exception traffic includes traffic that is not simply forwarded by the router but requires special handling, such as routing updates and log messages. These types of traffic are processed by the router's control plane rather than just being forwarded through the data plane.

• Question 130:

  What are two link-state routing protocols? (Choose two.)

  A. RIP
  B. IS-IS
  C. BGP
  D. OSPF
  B. IS-IS
  D. OSPF

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  Explanation

  Link-state routing protocols are a type of routing protocol used in packet- switching networks for finding the best path between source and destination. OSPF (Open Shortest Path First) and IS-IS (Intermediate System to Intermediate System) are both examples of link-state routing protocols. They work by maintaining a complete map or topology of the network, allowing routers to independently calculate the best path to each destination. Unlike distance-vector protocols like RIP, link-state protocols are more efficient and scalable, making them suitable for larger networks.