JN0-106 Online Practice Questions
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Which two statements about prefix lists in Junos are correct? (Choose two.)
Correct answers: A, B
Prefix lists are reusable named sets of prefixes. They can be referenced by multiple routing policies and can also be used by firewall filters, which avoids duplicating the same prefix matches.
A network administrator must set up the initial configuration of the out-of-band management interface on a new Juniper router to ensure management traffic is isolated from the default routing table (inet.0).
In this scenario, which configuration step is required to accomplish this task in Junos OS?
Correct answer: D
Out-of-band management uses a dedicated management interface such as fxp0.0 or em0.0. Enabling system management-instance places management traffic in a separate routing instance instead of inet.0.
Which layer of the OSI model contains IP address information?
Correct answer: D
IP addressing is a network-layer function, which is Layer 3 of the OSI model. Layer 2 uses MAC addressing, Layer 4 uses transport ports, and Layer 1 is physical signaling.
Which two statements are correct about Junos traceoptions? (Choose two.)
Correct answers: A, D
Traceoptions are configured under the relevant hierarchy and write trace output to a named file under /var/log by default. They are not enabled automatically, and they can be used in production when scoped carefully.
You are creating a routing policy to accept and redistribute routes into an IGP. Which match criterion identifies the route prefixes to select?
Correct answer: B
In Junos routing policy, a route-filter match identifies the route prefixes that a term should select. Neighbor, instance, and route type match other route attributes, not the specific prefix list itself.
The IP address 10.1.1.1 belongs to which class of IPv4 address space?
Correct answer: A
In classful IPv4 addressing, Class A covers first octet values from 1 through 126. The address 10.1.1.1 starts with 10, so it falls in Class A address space.
Which two reasons commonly justify using separate routing instances? (Choose two.)
Correct answers: B, D
Separate routing instances create independent routing tables for different contexts. That separation is useful when networks need isolation or overlapping address space that would conflict in a single global table.
A network device displays an invalid date and time after startup.
Which of the following actions can be used to correct the date and time? (Choose two.)
Correct answers: A, C
Device time can be corrected manually or synchronized from an NTP server. DNS resolves names and rebooting alone does not supply a trusted clock value, so neither directly fixes an invalid date and time.
Which two protocols can Junos OS use to archive configuration files remotely? (Choose two.)
Correct answers: A, D
Junos configuration archival supports remote transfer using URL schemes such as scp:// and ftp://. SFTP and HTTP are not the expected archive transfer protocols for this basic configuration archival feature.
Which two statements describe the Routing Engine on Junos OS devices? (Choose two.)
Correct answers: A, D
The Routing Engine is the Junos control-plane component. It runs routing processes and maintains routing tables. Packet forwarding from local forwarding-table copies is the role of the Packet Forwarding Engine, not the RE.