Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
Exhibit
R1# show ip route 192.168.50.0 Routing entry for 192.168.50.0/24 Known via "static", distance 1, metric 0 Routing Descriptor Blocks: * 10.1.1.2 Candidate sources seen on R1: - static via 10.1.1.2 - eBGP via 10.2.2.2 metric 0 - OSPF via 10.3.3.3 metric 20 - RIP via 10.4.4.4 metric 2
Exhibit: R1 learns 192.168.50.0/24 from multiple sources. Which two statements are correct about the route that will be installed in the routing table?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
The static route is preferred because its administrative distance is lowest
Administrative distance is compared before metric across different routing sources.
B
Distractor review
The OSPF route is preferred because cost 20 is lower than RIP metric 2
Metrics from different routing protocols are not compared directly.
C
Distractor review
The eBGP route would win over the static route because BGP is more dynamic
Dynamic versus static is not the decision rule here.
D
Best answer
If the static route were removed, the eBGP route would beat OSPF and RIP
Among the remaining choices, eBGP AD 20 is lower than OSPF 110 and RIP 120.
E
Distractor review
RIP would be chosen before OSPF because hop count is simpler
Simplicity is irrelevant; AD decides first.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is assuming that the routing protocol with the lowest metric always wins, regardless of administrative distance. For example, candidates might incorrectly believe that OSPF with a cost of 20 beats eBGP with an AD of 20 or that RIP’s hop count of 2 beats OSPF’s cost of 20. This mistake arises from confusing metrics with administrative distance. Metrics are only compared within the same routing protocol, while administrative distance is the primary factor when routes come from different sources. Ignoring this can lead to selecting incorrect answers about route preference.
Technical deep dive
How to think about this question
Administrative distance (AD) is a fundamental concept in Cisco routing that determines the trustworthiness of a route source. Each routing protocol and route type is assigned a default AD value, with lower values indicating more reliable sources. For example, static routes have an AD of 1, eBGP routes have 20, OSPF routes have 110, and RIP routes have 120. When a router learns multiple routes to the same destination network, it compares their AD values first to decide which route to install in the routing table. The decision process for route selection begins by comparing the administrative distances of all candidate routes to the same prefix. The route with the lowest AD is preferred and installed in the routing table. Only if multiple routes share the same AD does the router compare their metrics, such as OSPF cost or RIP hop count, to select the best path. This hierarchical decision ensures that the router always trusts the most reliable routing source before considering path efficiency. A common exam trap is to confuse metric comparison across different routing protocols. Metrics like OSPF cost and RIP hop count are only comparable within the same routing protocol. Candidates often mistakenly believe that a lower OSPF cost automatically beats a higher RIP metric or that dynamic routing protocols always override static routes. In practice, the static route with AD 1 always takes precedence over dynamic routes with higher AD values, unless it is removed or unavailable. Understanding this behavior is crucial for both exam success and real-world network troubleshooting.
KKey Concepts to Remember
- The router selects the route with the lowest administrative distance to install in the routing table when multiple sources advertise the same prefix.
- Administrative distance is a trustworthiness value assigned to routing sources, with static routes having the lowest default AD of 1.
- If multiple routes have the same administrative distance, the router compares their metrics to choose the best path within that routing protocol.
- Metrics such as OSPF cost or RIP hop count are only comparable within the same routing protocol and are not cross-compared between different protocols.
- eBGP routes have a default administrative distance of 20, which is lower than OSPF's 110 and RIP's 120, making eBGP preferred over these if static routes are absent.
- Static routes override dynamic routing protocol routes due to their lower administrative distance, regardless of the dynamic protocol's metric values.
- The routing table only installs one best route per destination prefix, determined first by administrative distance, then by metric if needed.
- Removing a static route causes the router to select the next best route based on the lowest administrative distance among dynamic protocols.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
The router selects the route with the lowest administrative distance to install in the routing table when multiple sources advertise the same prefix.
What is the correct answer to this question?
The correct answer is: The static route is preferred because its administrative distance is lowest — The router chooses the route with the lowest administrative distance first. If administrative distance ties, it then compares the metric within that routing source. In this case the static route wins because AD 1 beats eBGP 20, OSPF 110, and RIP 120.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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