mediumMultiple Choice
350-401 Practice Question: Issues the following command on Router R5: R5#…
A network engineer issues the following command on Router R5:
R5# show ip pim interface Interface PIM Nbrs Hello DR DR
Count Intvl Prior GigabitEthernet0/0 on 2 30 1 10.1.1.1 GigabitEthernet0/1 on 1 30 1 10.2.2.2 Loopback0 on 0 30 1 10.3.3.3
Based on this output, what can be concluded?
⚠ Common exam trap
Cisco often tests the misconception that the local router is always the DR when it has a higher IP, but the output clearly shows the DR IP in the 'DR' column, which may belong to a neighbor, not the local router.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The DR on GigabitEthernet0/0 is 10.1.1.1.
The output shows that on GigabitEthernet0/0, the DR (Designated Router) IP address is 10.1.1.1, which is listed in the 'DR' column. This indicates that 10.1.1.1 is the elected DR for that interface, making option A correct. The DR is elected based on the highest IP address when DR priorities are equal (both are 1 here), and 10.1.1.1 is the neighbor with the highest IP on that segment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The DR on GigabitEthernet0/0 is 10.1.1.1.
Why this is correct
The output definitively shows that for GigabitEthernet0/0, the DR column lists 10.1.1.1. In PIM Sparse Mode, the DR is the router with the highest IP address on the subnet unless priority overrides, and the address shown is the elected DR for that interface. Therefore, the statement matches the command output and is correct.
- ✗
The DR on GigabitEthernet0/1 is the local router.
Why it's wrong here
The claim that the local router is DR on GigabitEthernet0/1 cannot be validated because the output only reveals the DR address as 10.2.2.2 for that segment. Without knowing this router's own interface address or router ID, 10.2.2.2 could belong to a neighboring PIM router. Hence the statement is unsupported and likely incorrect, making it a wrong answer.
- ✗
PIM is disabled on Loopback0.
Why it's wrong here
The show output displays a PIM state of "on" for Loopback0, which directly contradicts the assertion that PIM is disabled. An interface with PIM enabled is capable of participating in PIM neighbor discovery and multicast routing. Therefore, PIM is operational on Loopback0, and the statement is factually inaccurate.
- ✗
The hello interval on GigabitEthernet0/0 is 60 seconds.
Why it's wrong here
The command output for GigabitEthernet0/0 shows the PIM hello interval is 30 seconds, not 60. PIM hello intervals are exchanged to maintain neighbor adjacencies, and the default is typically 30 seconds on this platform. The displayed value represents the actual configured interval, making the 60-second claim incorrect.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.