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Exam Code: N10-009
Exam Name: CompTIA Network+
Certification Provider: CompTIA
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CompTIA Network+ N10-009 Practice Test 24

Question 230

A team assumes IPv6 eliminates access-control requirements through its large address space. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Verify an IPv4 deny rule but never probe an unwanted IPv6 session
  2. Attempt unwanted IPv6 ingress while IPv4 policy remains unchanged
  3. Show IPv6 SLAAC succeeded and assume firewall enforcement also succeeded
  4. Count available IPv6 addresses instead of testing the application's permitted service ports

Explanation

Correct Answer

B:

Large address space is not a firewall. The result of the remedy is checked directly: Attempt unwanted IPv6 ingress while IPv4 policy remains unchanged.

Incorrect Answers

A:

Verify an IPv4 deny rule but never probe an unwanted IPv6 session. Large address space is not a firewall. The appropriate acceptance test is: Attempt unwanted IPv6 ingress while IPv4 policy remains unchanged.

C:

Show IPv6 SLAAC succeeded and assume firewall enforcement also succeeded. Large address space is not a firewall. The appropriate acceptance test is: Attempt unwanted IPv6 ingress while IPv4 policy remains unchanged.

D:

Count available IPv6 addresses instead of testing the application's permitted service ports. Large address space is not a firewall. The appropriate acceptance test is: Attempt unwanted IPv6 ingress while IPv4 policy remains unchanged.

Question 231

A branch with one upstream and fixed reachable prefix needs uncomplicated routing. Which response MOST directly addresses the stated network problem or requirement?

  1. Introduce a full Internet BGP route table for a single fixed branch destination
  2. Point the static route to a next hop outside any reachable transit network
  3. Configure an appropriate static route with explicit next hop
  4. Set a default route toward an internal user VLAN instead of the known upstream

Explanation

Correct Answer

C:

Static routes avoid protocol convergence but need maintenance when topology changes. A direct way to confirm the outcome is to check route table and probe destination with return route in place.

Incorrect Answers

A:

Introduce a full Internet BGP route table for a single fixed branch destination. Static routes avoid protocol convergence but need maintenance when topology changes. This does not implement the needed approach: configure an appropriate static route with explicit next hop.

B:

Point the static route to a next hop outside any reachable transit network. Static routes avoid protocol convergence but need maintenance when topology changes. This does not implement the needed approach: configure an appropriate static route with explicit next hop.

D:

Set a default route toward an internal user VLAN instead of the known upstream. Static routes avoid protocol convergence but need maintenance when topology changes. This does not implement the needed approach: configure an appropriate static route with explicit next hop.

Question 232

A branch with one upstream and fixed reachable prefix needs uncomplicated routing. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Confirm the local interface is Up without inspecting the destination static route
  2. Ping an address on the source LAN and infer the next-hop and return route both work
  3. Check a DNS answer instead of tracing packets through the configured static next hop
  4. Check route table and probe destination with return route in place

Explanation

Correct Answer

D:

Static routes avoid protocol convergence but need maintenance when topology changes. The result of the remedy is checked directly: Check route table and probe destination with return route in place.

Incorrect Answers

A:

Confirm the local interface is Up without inspecting the destination static route. Static routes avoid protocol convergence but need maintenance when topology changes. The appropriate acceptance test is: Check route table and probe destination with return route in place.

B:

Ping an address on the source LAN and infer the next-hop and return route both work. Static routes avoid protocol convergence but need maintenance when topology changes. The appropriate acceptance test is: Check route table and probe destination with return route in place.

C:

Check a DNS answer instead of tracing packets through the configured static next hop. Static routes avoid protocol convergence but need maintenance when topology changes. The appropriate acceptance test is: Check route table and probe destination with return route in place.

Question 233

A multihomed enterprise learns thousands of external prefixes from providers. Which response MOST directly addresses the stated network problem or requirement?

  1. Use BGP sessions and appropriate import/export policies
  2. Replace the providers' dynamic prefix exchanges with one untested default static route
  3. Accept every external BGP prefix and advertise every private subnet without import/export policy
  4. Configure OSPF neighbor discovery across independent Internet autonomous systems as the sole interdomain control

Explanation

Correct Answer

A:

BGP manages interdomain reachability; OSPF is not an Internet peering substitute. A direct way to confirm the outcome is to inspect BGP neighbor state, accepted prefixes and policy hits.

Incorrect Answers

B:

Replace the providers' dynamic prefix exchanges with one untested default static route. BGP manages interdomain reachability; OSPF is not an Internet peering substitute. This does not implement the needed approach: use BGP sessions and appropriate import/export policies.

C:

Accept every external BGP prefix and advertise every private subnet without import/export policy. BGP manages interdomain reachability; OSPF is not an Internet peering substitute. This does not implement the needed approach: use BGP sessions and appropriate import/export policies.

D:

Configure OSPF neighbor discovery across independent Internet autonomous systems as the sole interdomain control. BGP manages interdomain reachability; OSPF is not an Internet peering substitute. This does not implement the needed approach: use BGP sessions and appropriate import/export policies.

Question 234

A multihomed enterprise learns thousands of external prefixes from providers. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Report the BGP TCP session Established without examining received route filters
  2. Inspect BGP neighbor state, accepted prefixes and policy hits
  3. Count all prefixes in the local RIB without testing which peer supplied accepted routes
  4. Ping a provider interface but never check desired BGP advertisements or communities

Explanation

Correct Answer

B:

BGP manages interdomain reachability; OSPF is not an Internet peering substitute. The result of the remedy is checked directly: Inspect BGP neighbor state, accepted prefixes and policy hits.

Incorrect Answers

A:

Report the BGP TCP session Established without examining received route filters. BGP manages interdomain reachability; OSPF is not an Internet peering substitute. The appropriate acceptance test is: Inspect BGP neighbor state, accepted prefixes and policy hits.

C:

Count all prefixes in the local RIB without testing which peer supplied accepted routes. BGP manages interdomain reachability; OSPF is not an Internet peering substitute. The appropriate acceptance test is: Inspect BGP neighbor state, accepted prefixes and policy hits.

D:

Ping a provider interface but never check desired BGP advertisements or communities. BGP manages interdomain reachability; OSPF is not an Internet peering substitute. The appropriate acceptance test is: Inspect BGP neighbor state, accepted prefixes and policy hits.

Question 235

A medium internal routed campus needs link-state reconvergence after a core failure. Which response MOST directly addresses the stated network problem or requirement?

  1. Disable the OSPF routing process and rely on stale static paths after a core failure
  2. Place directly connected OSPF neighbors into conflicting area identities
  3. Implement compatible OSPF areas and stable neighbor design
  4. Set all core interface costs arbitrarily without examining the alternate failover path

Explanation

Correct Answer

C:

OSPF chooses shortest paths from link-state costs within its design. A direct way to confirm the outcome is to observe LSDB, adjacencies, cost and route convergence after link loss.

Incorrect Answers

A:

Disable the OSPF routing process and rely on stale static paths after a core failure. OSPF chooses shortest paths from link-state costs within its design. This does not implement the needed approach: implement compatible OSPF areas and stable neighbor design.

B:

Place directly connected OSPF neighbors into conflicting area identities. OSPF chooses shortest paths from link-state costs within its design. This does not implement the needed approach: implement compatible OSPF areas and stable neighbor design.

D:

Set all core interface costs arbitrarily without examining the alternate failover path. OSPF chooses shortest paths from link-state costs within its design. This does not implement the needed approach: implement compatible OSPF areas and stable neighbor design.

Question 236

A medium internal routed campus needs link-state reconvergence after a core failure. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Observe an OSPF process is running but no Full adjacency or LSDB synchronization
  2. Ping a core switch while ignoring routes converging after the primary link is removed
  3. Inspect only interface link LEDs without measuring route selection and reconvergence time
  4. Observe LSDB, adjacencies, cost and route convergence after link loss

Explanation

Correct Answer

D:

OSPF chooses shortest paths from link-state costs within its design. The result of the remedy is checked directly: Observe LSDB, adjacencies, cost and route convergence after link loss.

Incorrect Answers

A:

Observe an OSPF process is running but no Full adjacency or LSDB synchronization. OSPF chooses shortest paths from link-state costs within its design. The appropriate acceptance test is: Observe LSDB, adjacencies, cost and route convergence after link loss.

B:

Ping a core switch while ignoring routes converging after the primary link is removed. OSPF chooses shortest paths from link-state costs within its design. The appropriate acceptance test is: Observe LSDB, adjacencies, cost and route convergence after link loss.

C:

Inspect only interface link LEDs without measuring route selection and reconvergence time. OSPF chooses shortest paths from link-state costs within its design. The appropriate acceptance test is: Observe LSDB, adjacencies, cost and route convergence after link loss.

Question 237

A small Cisco-centered routed domain uses EIGRP across branches. Which response MOST directly addresses the stated network problem or requirement?

  1. Evaluate EIGRP adjacency and metric selection rather than choose BGP by default
  2. Replace the branch's EIGRP neighbors with BGP merely because routing is dynamic
  3. Configure EIGRP AS numbers that differ between directly adjacent routers
  4. Accept a feasible successor without checking route feasibility and advertised distance

Explanation

Correct Answer

A:

EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. A direct way to confirm the outcome is to inspect neighbor table, feasible successors and end-to-end routing.

Incorrect Answers

B:

Replace the branch's EIGRP neighbors with BGP merely because routing is dynamic. EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. This does not implement the needed approach: evaluate EIGRP adjacency and metric selection rather than choose BGP by default.

C:

Configure EIGRP AS numbers that differ between directly adjacent routers. EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. This does not implement the needed approach: evaluate EIGRP adjacency and metric selection rather than choose BGP by default.

D:

Accept a feasible successor without checking route feasibility and advertised distance. EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. This does not implement the needed approach: evaluate EIGRP adjacency and metric selection rather than choose BGP by default.

Question 238

A small Cisco-centered routed domain uses EIGRP across branches. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Inspect a router's IP interface list but never its EIGRP neighbor or topology table
  2. Inspect neighbor table, feasible successors and end-to-end routing
  3. Verify one local subnet ping while remote branches still lack EIGRP-learned reachability
  4. Read the autonomous-system configuration alone without comparing computed routes and successors

Explanation

Correct Answer

B:

EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. The result of the remedy is checked directly: Inspect neighbor table, feasible successors and end-to-end routing.

Incorrect Answers

A:

Inspect a router's IP interface list but never its EIGRP neighbor or topology table. EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. The appropriate acceptance test is: Inspect neighbor table, feasible successors and end-to-end routing.

C:

Verify one local subnet ping while remote branches still lack EIGRP-learned reachability. EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. The appropriate acceptance test is: Inspect neighbor table, feasible successors and end-to-end routing.

D:

Read the autonomous-system configuration alone without comparing computed routes and successors. EIGRP's DUAL behavior is not equivalent to BGP AS-path selection. The appropriate acceptance test is: Inspect neighbor table, feasible successors and end-to-end routing.

Question 239

A router learns the same destination from connected and static paths. Which response MOST directly addresses the stated network problem or requirement?

  1. Prefer a less-specific static route over a connected matching prefix solely due to its label
  2. Select a routing source by administrative distance before the destination-prefix length is compared
  3. Resolve route preference using longest-prefix match and route-source priority
  4. Remove the connected network and force traffic into an unrelated default gateway

Explanation

Correct Answer

C:

Administrative distance matters when competing route sources offer same prefix. A direct way to confirm the outcome is to inspect chosen route for the identical destination/prefix.

Incorrect Answers

A:

Prefer a less-specific static route over a connected matching prefix solely due to its label. Administrative distance matters when competing route sources offer same prefix. This does not implement the needed approach: resolve route preference using longest-prefix match and route-source priority.

B:

Select a routing source by administrative distance before the destination-prefix length is compared. Administrative distance matters when competing route sources offer same prefix. This does not implement the needed approach: resolve route preference using longest-prefix match and route-source priority.

D:

Remove the connected network and force traffic into an unrelated default gateway. Administrative distance matters when competing route sources offer same prefix. This does not implement the needed approach: resolve route preference using longest-prefix match and route-source priority.

Question 240

A router learns the same destination from connected and static paths. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Read only configured route statements without checking the actual installed forwarding choice
  2. Compare two different destination addresses and infer preference for the same matched prefix
  3. Ping an unaffected network instead of inspecting the exact route selected for the conflicting destination
  4. Inspect chosen route for the identical destination/prefix

Explanation

Correct Answer

D:

Administrative distance matters when competing route sources offer same prefix. The result of the remedy is checked directly: Inspect chosen route for the identical destination/prefix.

Incorrect Answers

A:

Read only configured route statements without checking the actual installed forwarding choice. Administrative distance matters when competing route sources offer same prefix. The appropriate acceptance test is: Inspect chosen route for the identical destination/prefix.

B:

Compare two different destination addresses and infer preference for the same matched prefix. Administrative distance matters when competing route sources offer same prefix. The appropriate acceptance test is: Inspect chosen route for the identical destination/prefix.

C:

Ping an unaffected network instead of inspecting the exact route selected for the conflicting destination. Administrative distance matters when competing route sources offer same prefix. The appropriate acceptance test is: Inspect chosen route for the identical destination/prefix.

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