Juniper Juniper Certifications JN0-104 Questions & Answers

• Question 171:

  Which statement is true about PFEs?

  A. A PFE receives microcode updates from the RE.

  B. A PFE receives layer 4 forwarding tables updates from the RE.

  C. A PFE receives hardware status messages from the RE

  D. A PFE receives environmental status messages from RE.

  Correct Answer: B

• Question 172:

  You have configuration groups applied on your router.

  Which command would you use to see all components of the interface hierarchy?

  A. show configuration interfaces | display detail

  B. show configuration interfaces | display changed

  C. show configuration interfaces | display set

  D. show configuration interfaces | display inheritance

  Correct Answer: D

• Question 173:

  You issue a "request system zeroize" command. Which statement is correct in this scenario?

  A. All data files remain unchanged but all configuration settings returned to factory defaults.

  B. All data files are deleted and all configuration settings are returned to factory defaults.

  C. All data files are deleted and all configuration settings remain unchanged

  D. Disk space is freed by rotating log files and a proposed list of files to be deleted is presented.

  Correct Answer: B

• Question 174:

  Which CIDR notation is the equivalent of the subnet mask of 255.255.192.0?

  A. /19

  B. /18

  C. /20

  D. /17

  Correct Answer: B

• Question 175:

  When a system process encounters an error, how does the Junos OS protect the other processes from being impacted?

  A. The Junos OS executes only one process at a time.

  B. Each routing protocol runs as an individual process.

  C. Each process operates in its own shared memory space.

  D. The Junos OS executes multiple processes simultaneously.

  Correct Answer: C

  http://juniper-basic.blogspot.com/2017/02/juniper-basic.html

  Junos OS functionality is compartmentalized into multiple software processes.Each process handles a portion of the device's functionality. Each process runs in its own protected memory space, ensuring that one process cannot directly interfere with another. When a single process fails, the entire system does not necessarily fail.This modularity also ensures that new features can be added with less likelihood of breaking current functionality.The Junos OS is the trusted, secure network operating system powering the high-performance network infrastructure offered by Juniper Networks. The Junos kernel is based on the FreeBSD UNIX operating system, which is an open-sourcesoftware system.

• Question 176:

  What does the number inside the square bracket represent?

  

  A. Metric

  B. Local preference

  C. Protocol reference number

  D. Route preference

  Correct Answer: D

  https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/command/show- route.html#show-route-command__d48917e62

  Module 9 of Juniper Open Learning, Routing Fundamentals describes the [Source/Route Preference]. The metric is 'how' a protocol calculates the best path to a destination. RIP = Hops, OSPF = Cost. Metrics are unique to protocols. user@host> show route inet.0: 11 destinations, 12 routes (11 active, 0 holddown, 0 hidden) + = Active Route, - = Last Active, * = Both

  1:65500:1:10.0.0.20/240 *[MVPN/70] 19:53:41, metric2 1 Indirect 1:65500:1:10.0.0.40/240 *[BGP/170] 19:53:29, localpref 100, from 10.0.0.30 AS path: I > to 10.0.24.4 via lt-0/3/0.24, label-switched- path toD [BGP/170] 19:53:26, localpref 100, from 10.0.0.33 AS path: I > to 10.0.24.4 via lt-0/3/0.24, label-switched-path toD

  inside square brackets -> route preference metric and localpref are optional and after the date

• Question 177:

  Depending on the device type, Junos is built upon which two OS kernels? (Choose two.)

  A. NetBSD

  B. FreeBSD

  C. Linux

  D. OpenBSD

  Correct Answer: BC

• Question 178:

  Which two statements are true about the default behavior of Junos routing policies? (Choose two.)

  A. Routing policies can export active and inactive routes.

  B. Routing policies can export only active routes.

  C. Routing policies control the flow of routing information going to and from the routing table.

  D. Routing policies control the flow of routing information going to and from the forwarding table.

  Correct Answer: BC

• Question 179:

  Which command is used to load the rescue configuration?

  A. load merge rescue

  B. rollback rescue

  C. rollback 0

  D. load replace rescue

  Correct Answer: B

• Question 180:

  What happens when a route does not match any user-configured policies?

  A. The route is rejected.

  B. The route is accepted.

  C. The route is given a lower priority.

  D. The route is sent to the default policy.

  Correct Answer: D