JNCIA-Junos Exam QuestionsBrowse all questions from this exam

JNCIA-Junos Exam - Question 47


Exam JNCIA-Junos Question 47

Referring to the exhibit, what will be the source address for packets egressing et-0/0/34.0?

Show Answer
Correct Answer: A

In the configuration shown, there are multiple addresses defined for the interface et-0/0/34.0. Among these addresses, the 'preferred' address is 10.20.0.1, which is specified to be used as the default source address for outgoing packets. The 'primary' addresses (10.30.0.1 and 10.40.0.1) are typically used for broadcast and multicast packets, not as the default source address for egressing unicast packets. Therefore, the source address for packets egressing et-0/0/34.0 will be 10.20.0.1.

Discussion

9 comments
Sign in to comment
Kons01Option: A
Sep 28, 2022

A should be the correct answer, prefered IP will be used as source for outgoing packets. Primary defined IP's will be used just for broadcast and multicast https://www.youtube.com/watch?v=045KRRS9fCg&t=396s

Munrra
Sep 15, 2022

A is the correct answer

abual3ees
Sep 21, 2022

why not b ?

nokipaOption: B
Jun 5, 2023

based on https://www.juniper.net/documentation/en_US/junos9.5/information-products/topic-collections/config-guide-network-interfaces/interfaces-configuring-default-primary-and-preferred-addresses-and-interfaces.html The primary address on an interface is the address that is used by default as the local address for broadcast and multicast packets sourced locally and sent out the interface and lower IP is B.

robbyG
Jan 29, 2024

this question does not make sense. All four IP addresses configured all belong to different subnets. Hence there is only one "preferred" IP address per subnet. So it depends which subnet the destination IP is part of, but the question does not say.

misu112
Oct 4, 2022

answer A

aisa007
Nov 1, 2022

It’s A

AnswerCOption: C
Apr 25, 2023

Preferred used - ANSWER C - Lowest IP -JunOS Explenation: Configure the Preferred Address for an Interface The preferred address on an interface is the default local address used for packets sourced by the local router to destinations on the subnet. By default, the numerically lowest local address is chosen. For example, if the addresses 172.16.1.1/12, 172.16.1.2/12, and 172.16.1.3/12 are configured on the same interface, the preferred address on the subnet (by default, 172.16.1.1) is used as a local address when you issue a ping 172.16.1.5 command. ASWER C - Lowest IP

cempejon
Sep 4, 2023

You forgot to copy last part of that: To set a different preferred address for the subnet, include the preferred statement: This means if you set "preferred" it will take even interfaces has lower ip

thegreennookerkhaliOption: A
Aug 16, 2023

A is the correct answer

JankoHrasko1Option: A
Jan 19, 2024

A should be right