Cisco CCNA Static and Dynamic Routing 2 — Questions and Answers
Question 1: A router has two routes to 192.168.10.0/24: one via OSPF with metric 20 and one via EIGRP with metric 100. Which route is installed in the routing table by default?
- The OSPF route because OSPF has a lower administrative distance of 110
- The EIGRP route because EIGRP has a lower administrative distance of 90 (Correct answer)
- Both routes are installed and traffic is load-balanced
- Neither route; the router requests manual configuration
Correct answer: The EIGRP route because EIGRP has a lower administrative distance of 90
EIGRP has an administrative distance of 90, which is lower than OSPF's 110, so the EIGRP route is preferred regardless of metric.
Question 2: Which command configures a default static route on a Cisco router pointing to next-hop 10.0.0.1?
- ip route 0.0.0.0 255.255.255.255 10.0.0.1
- ip route default 0.0.0.0 10.0.0.1
- ip route 0.0.0.0 0.0.0.0 10.0.0.1 (Correct answer)
- ip default-route 10.0.0.1
Correct answer: ip route 0.0.0.0 0.0.0.0 10.0.0.1
The correct syntax for a default static route uses network 0.0.0.0 with wildcard mask 0.0.0.0 followed by the next-hop address.
Question 3: What is the purpose of the EIGRP feasibility condition?
- It ensures all successors have equal-cost paths to the destination
- It guarantees a backup route is loop-free by requiring the feasible successor's RD to be less than the successor's FD (Correct answer)
- It prevents routes with a metric higher than 4,294,967,295 from being installed
- It limits the number of EIGRP neighbors to 255
Correct answer: It guarantees a backup route is loop-free by requiring the feasible successor's RD to be less than the successor's FD
The feasibility condition confirms a feasible successor is loop-free by checking that its reported distance is less than the current successor's feasible distance.
Question 4: A floating static route is configured with administrative distance 200. Under what condition will this route appear in the routing table?
- Always, because static routes take precedence over dynamic routes
- Only when the primary dynamic route from a protocol with AD less than 200 is lost (Correct answer)
- Only when the router reloads and dynamic routing has not yet converged
- Never; AD 200 routes are rejected by IOS
Correct answer: Only when the primary dynamic route from a protocol with AD less than 200 is lost
A floating static route with a higher AD than the dynamic protocol stays hidden until the dynamic route disappears, then it activates as a backup.
Question 5: Which OSPF network type sends Hello packets every 10 seconds and has a dead interval of 40 seconds by default?
- Point-to-multipoint non-broadcast
- Broadcast and point-to-point (Correct answer)
- Non-broadcast multi-access (NBMA)
- Loopback
Correct answer: Broadcast and point-to-point
OSPF broadcast and point-to-point network types use a 10-second Hello interval and 40-second dead interval by default.
Question 6: What does the 'S*' designation mean in a Cisco routing table output?
- A static route learned via SNMP
- A candidate default static route (Correct answer)
- A static route pointing to a stub network
- A summarized static route
Correct answer: A candidate default static route
The 'S*' notation indicates a static route that is also a candidate default route (gateway of last resort).
Question 7: A network administrator notices that EIGRP is not forming a neighbor relationship between two directly connected routers. Which mismatch would NOT prevent adjacency?
- Autonomous system number mismatch
- K-value mismatch
- Authentication key mismatch
- Hello timer mismatch (Correct answer)
Correct answer: Hello timer mismatch
Unlike OSPF, EIGRP does not require Hello and Hold timers to match between neighbors to form an adjacency.
Cisco CCNA Static and Dynamic Routing 2
A router has two routes to 192.168.10.0/24: one via OSPF with metric 20 and one via EIGRP with metric 100.
Which route is installed in the routing table by default?