Cisco 300-410 Free Practice Questions — Page 1

Correct Answer: B. Issue the no eigrp stub command on R1.

The exhibit shows R1's EIGRP topology has a default route (::/0) learned via R2 (GigabitEthernet1/0), meaning R2 is the path to the Internet. The Branch router shows it has a route to 2001:DB8:0:4::/64 (its own network) and other prefixes, but no default route (::/0) is visible in the Branch topology table. In EIGRP, a stub router only advertises connected and summary routes by default, and does not propagate routes learned from other EIGRP neighbors. If R1 is configured as an EIGRP stub, it will not advertise the default route (：:/0) learned from R2 toward the Branch router. The fix is to remove the stub configuration from R1 using no eigrp stub, so R1 can properly advertise the default route to Branch. Option A is wrong because issuing eigrp stub on R1 would make the problem worse. Options C and D involve R2, but the problem is on R1 blocking propagation toward Branch. The Branch router needs to receive the default route from R1, which requires R1 to not be a stub.

Correct Answer: A. R1 sees 192.168.130.0/24 as two AS hops away instead of one AS hop away.

The exhibit shows R1's EIGRP topology has a default route (::/0) learned via R2 (GigabitEthernet1/0), meaning R2 is the path to the Internet. The Branch router shows it has a route to 2001:DB8:0:4::/64 (its own network) and other prefixes, but no default route (::/0) is visible in the Branch topology table. In EIGRP, a stub router only advertises connected and summary routes by default, and does not propagate routes learned from other EIGRP neighbors. If R1 is configured as an EIGRP stub, it will not advertise the default route (：:/0) learned from R2 toward the Branch router. The fix is to remove the stub configuration from R1 using no eigrp stub, so R1 can properly advertise the default route to Branch. Option A is wrong because issuing eigrp stub on R1 would make the problem worse. Options C and D involve R2, but the problem is on R1 blocking propagation toward Branch. The Branch router needs to receive the default route from R1, which requires R1 to not be a stub.

Correct Answer: C. policy-based routing

Policy-Based Routing (PBR) allows a router to forward packets based on criteria other than the destination IP address (e.g., source IP, protocol, port), without modifying the routing table or the FIB. PBR is applied on an interface and intercepts packets before the normal routing table lookup. It changes the forwarding decision at the data plane level based on policy, not routing protocol updates. Option A (NBMA) is a network type, not a forwarding mechanism. Option B (packet switching) is the standard switching method that uses the routing table — it does not bypass it. Option D (FIB) is the actual table used for forwarding decisions; it is derived from the routing table, not a method to change decisions independently of it.

Correct Answer: C. The configured AD for the static route is higher than the AD of OSPF.

The exhibit shows a static route configured with AD of 130 (ip route 192.168.2.2 255.255.255.255 209.165.200.225 130), and the routing table shows the same destination learned via OSPF with AD 110. Since OSPF's default AD (110) is lower than the configured static route AD (130), OSPF wins and is installed in the routing table. Administrative Distance is the first tiebreaker — the lower the AD, the more preferred the route. Option A is wrong because dynamic protocols do not always override static routes; static routes have a default AD of 1, which is lower than most dynamic protocols. Option B is wrong because metric is only compared between routes from the same protocol, not across different protocols. Option D is wrong because the static route syntax is valid; it is simply set with a higher AD intentionally (floating static route).

Correct Answer: C. There is no route for a subnet inside 10.0.0.0/8, so the summary route is not generated.

The summary-address command in OSPF (used on an ASBR) only generates a summary route if at least one specific subnet within the summary range exists in the routing table. The routing table shown has no subnet within 10.0.0.0/8, so OSPF has no reason to generate the summary. The summary-address command on an ASBR suppresses more-specific routes and advertises the summary only when a matching subnet is present. Option A is incorrect because summary-address on an ASBR is used for external routes, not only inter-area summarization. Option B is wrong because summary routes do appear in the routing table when valid. Option D is wrong because summary routes generated by an ASBR are visible locally as well as to other routers.