mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ip ospf interface GigabitEthernet0/0
GigabitEthernet0/0 is up, line protocol is up Internet Address 192.168.12.1/24, Area 0 Process ID 1, Router ID 10.1.1.1, Network Type BROADCAST, Cost: 10 Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 10.1.1.2, Interface address 192.168.12.2 Backup Designated router (ID) 10.1.1.1, Interface address 192.168.12.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 oob-resync timeout 40 Hello due in 00:00:03
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.1.2 (Designated Router) Suppress hello for 0 neighbor(s)
Based on this output, which statement is correct?
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 dead timer is set to 40 seconds and is functioning correctly.
The interface is in state BDR, meaning Router R1 is the backup designated router. The DR is 10.1.1.2. The output shows one neighbor, which is the DR, and the adjacency is full.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Router R1 is the Designated Router on this segment.
Why it's wrong here
The state is BDR, not DR. The DR is 10.1.1.2.
- ✗
Router R1 has a priority of 0, preventing it from becoming DR.
Why it's wrong here
The priority is 1, which is the default and allows it to be BDR.
- ✓
The dead timer is set to 40 seconds and is functioning correctly.
Why this is correct
The dead interval is 40 seconds, and the hello timer is 10 seconds, which is standard. The adjacency is up, so timers are working.
- ✗
Router R1 is not receiving hello packets from the DR.
Why it's wrong here
The adjacency is with the DR, so hello packets are being received.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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