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SSCP Practice Question: A network administrator is unable to ping the…
Exhibit
Refer to the exhibit.
Router# show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 10.1.1.2 to network 0.0.0.0
10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C 10.1.1.0/24 is directly connected, GigabitEthernet0/0
O 10.2.2.0/24 [110/20] via 10.1.1.2, 00:05:12, GigabitEthernet0/0
S 10.3.3.0/24 [1/0] via 10.1.1.2
C 192.168.1.0/24 is directly connected, GigabitEthernet0/1A network administrator is unable to ping the server at 10.2.2.100 from a host on the 192.168.1.0/24 network. Based on the exhibit, what is the most likely cause?
⚠ Common exam trap
ISC2 often tests the distinction between a missing route (which would cause a complete failure) and an unstable route (which causes intermittent failure), tricking candidates into choosing a static answer like 'missing route' when the symptom of intermittent connectivity points to route flapping.
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 OSPF neighbor relationship may be unstable, causing intermittent route flapping.
The exhibit shows that the host on 192.168.1.0/24 cannot reach 10.2.2.100, but the routing table includes both a static route to 10.3.3.0 and an OSPF route to 10.2.2.0. Option D is correct because the symptom of intermittent reachability (sometimes ping works, sometimes not) combined with a known OSPF neighbor relationship points to route flapping, where the OSPF route for 10.2.2.0 is repeatedly added and removed due to an unstable neighbor adjacency, causing the ping to fail when the route is absent.
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 static route to 10.3.3.0 is misconfigured.
Why it's wrong here
The static route is present and not affecting 10.2.2.0.
- ✗
The gateway of last resort is missing.
Why it's wrong here
The default route is configured as 10.1.1.2.
- ✗
The OSPF route for 10.2.2.0 is not in the routing table.
Why it's wrong here
It is present as an OSPF route.
- ✓
The OSPF neighbor relationship may be unstable, causing intermittent route flapping.
Why this is correct
The route is learned but the age (00:05:12) may indicate recent instability.
Visual reference
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SSCP practice question is part of Courseiva's free ISC2 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 SSCP exam.