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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 17

Question 160

A factory combines wireless sensor access, redundant core, and point-to-point remote link. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Ping only a central Ethernet switch while wireless and remote link transitions remain unchecked
  2. Confirm all device types appear on a diagram without examining intermedia path dependencies
  3. Test one local wireless client while leaving the remote point-to-point backhaul unverified
  4. Verify path dependency maps across each medium and layer

Explanation

Correct Answer

D:

Mixed topologies should be evaluated by each component's failure domain. The result of the remedy is checked directly: Verify path dependency maps across each medium and layer.

Incorrect Answers

A:

Ping only a central Ethernet switch while wireless and remote link transitions remain unchecked. Mixed topologies should be evaluated by each component's failure domain. The appropriate acceptance test is: Verify path dependency maps across each medium and layer.

B:

Confirm all device types appear on a diagram without examining intermedia path dependencies. Mixed topologies should be evaluated by each component's failure domain. The appropriate acceptance test is: Verify path dependency maps across each medium and layer.

C:

Test one local wireless client while leaving the remote point-to-point backhaul unverified. Mixed topologies should be evaluated by each component's failure domain. The appropriate acceptance test is: Verify path dependency maps across each medium and layer.

Question 161

A provider ring has a single break but protected traffic should continue through the other arc. Which response MOST directly addresses the stated network problem or requirement?

  1. Select ring protection appropriate to its switching technology
  2. Disable ring-protection mechanisms and allow loops to forward indefinitely during failures
  3. Route traffic permanently through the broken span without switching to the surviving arc
  4. Install a physical ring but configure no protection or forwarding-loop control

Explanation

Correct Answer

A:

Ring resilience depends on loop prevention and protection convergence. A direct way to confirm the outcome is to inject a controlled span loss and observe restoration.

Incorrect Answers

B:

Disable ring-protection mechanisms and allow loops to forward indefinitely during failures. Ring resilience depends on loop prevention and protection convergence. This does not implement the needed approach: select ring protection appropriate to its switching technology.

C:

Route traffic permanently through the broken span without switching to the surviving arc. Ring resilience depends on loop prevention and protection convergence. This does not implement the needed approach: select ring protection appropriate to its switching technology.

D:

Install a physical ring but configure no protection or forwarding-loop control. Ring resilience depends on loop prevention and protection convergence. This does not implement the needed approach: select ring protection appropriate to its switching technology.

Question 162

A provider ring has a single break but protected traffic should continue through the other arc. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Confirm both directions are configured while never interrupting a single ring span
  2. Inject a controlled span loss and observe restoration
  3. Monitor just the upstream router reachability rather than link-failure restoration across the ring
  4. Count ring nodes without observing convergence and traffic continuity after a controlled break

Explanation

Correct Answer

B:

Ring resilience depends on loop prevention and protection convergence. The result of the remedy is checked directly: Inject a controlled span loss and observe restoration.

Incorrect Answers

A:

Confirm both directions are configured while never interrupting a single ring span. Ring resilience depends on loop prevention and protection convergence. The appropriate acceptance test is: Inject a controlled span loss and observe restoration.

C:

Monitor just the upstream router reachability rather than link-failure restoration across the ring. Ring resilience depends on loop prevention and protection convergence. The appropriate acceptance test is: Inject a controlled span loss and observe restoration.

D:

Count ring nodes without observing convergence and traffic continuity after a controlled break. Ring resilience depends on loop prevention and protection convergence. The appropriate acceptance test is: Inject a controlled span loss and observe restoration.

Question 163

A retailer's growing branches require one IP route per site, creating route-table growth. Which response MOST directly addresses the stated network problem or requirement?

  1. Advertise one overly broad prefix covering branch address space the retailer does not own
  2. Summarize disjoint branches solely because they have the same first dotted-decimal octet
  3. Aggregate routable prefixes where topology and addressing permit
  4. Withdraw specific routes even when the summary's next hop black-holes one included branch

Explanation

Correct Answer

C:

Route summarization is valid only for reachable contiguous address blocks. A direct way to confirm the outcome is to confirm summary route still reaches all included sites without black-holing.

Incorrect Answers

A:

Advertise one overly broad prefix covering branch address space the retailer does not own. Route summarization is valid only for reachable contiguous address blocks. This does not implement the needed approach: aggregate routable prefixes where topology and addressing permit.

B:

Summarize disjoint branches solely because they have the same first dotted-decimal octet. Route summarization is valid only for reachable contiguous address blocks. This does not implement the needed approach: aggregate routable prefixes where topology and addressing permit.

D:

Withdraw specific routes even when the summary's next hop black-holes one included branch. Route summarization is valid only for reachable contiguous address blocks. This does not implement the needed approach: aggregate routable prefixes where topology and addressing permit.

Question 164

A retailer's growing branches require one IP route per site, creating route-table growth. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Verify one summarized branch works while other included sites remain unreachable
  2. Compare route-table line count without testing individual destinations under the summary
  3. Check only route origin names rather than actual summary alignment and forwarding coverage
  4. Confirm summary route still reaches all included sites without black-holing

Explanation

Correct Answer

D:

Route summarization is valid only for reachable contiguous address blocks. The result of the remedy is checked directly: Confirm summary route still reaches all included sites without black-holing.

Incorrect Answers

A:

Verify one summarized branch works while other included sites remain unreachable. Route summarization is valid only for reachable contiguous address blocks. The appropriate acceptance test is: Confirm summary route still reaches all included sites without black-holing.

B:

Compare route-table line count without testing individual destinations under the summary. Route summarization is valid only for reachable contiguous address blocks. The appropriate acceptance test is: Confirm summary route still reaches all included sites without black-holing.

C:

Check only route origin names rather than actual summary alignment and forwarding coverage. Route summarization is valid only for reachable contiguous address blocks. The appropriate acceptance test is: Confirm summary route still reaches all included sites without black-holing.

Question 165

A multi-site network has two Internet exits, but application sessions break at failover. Which response MOST directly addresses the stated network problem or requirement?

  1. Design path symmetry or state-sharing for sessionful edge functions
  2. Use asymmetric stateful firewall paths at the two Internet exits without session synchronization
  3. Fail over the NAT public IP abruptly while expecting existing TCP sessions to retain identity
  4. Route return packets through a different edge firewall that lacks the primary session state

Explanation

Correct Answer

A:

Multiple exits are not sufficient when stateful paths become asymmetric. A direct way to confirm the outcome is to remove the primary exit and inspect session continuity.

Incorrect Answers

B:

Use asymmetric stateful firewall paths at the two Internet exits without session synchronization. Multiple exits are not sufficient when stateful paths become asymmetric. This does not implement the needed approach: design path symmetry or state-sharing for sessionful edge functions.

C:

Fail over the NAT public IP abruptly while expecting existing TCP sessions to retain identity. Multiple exits are not sufficient when stateful paths become asymmetric. This does not implement the needed approach: design path symmetry or state-sharing for sessionful edge functions.

D:

Route return packets through a different edge firewall that lacks the primary session state. Multiple exits are not sufficient when stateful paths become asymmetric. This does not implement the needed approach: design path symmetry or state-sharing for sessionful edge functions.

Question 166

A multi-site network has two Internet exits, but application sessions break at failover. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Confirm the backup interface is Up without evaluating interrupted stateful connections
  2. Remove the primary exit and inspect session continuity
  3. Ping a public DNS resolver after failover but never test the original application sessions
  4. Check each ISP line independently without capturing forward and reverse traffic symmetry

Explanation

Correct Answer

B:

Multiple exits are not sufficient when stateful paths become asymmetric. The result of the remedy is checked directly: Remove the primary exit and inspect session continuity.

Incorrect Answers

A:

Confirm the backup interface is Up without evaluating interrupted stateful connections. Multiple exits are not sufficient when stateful paths become asymmetric. The appropriate acceptance test is: Remove the primary exit and inspect session continuity.

C:

Ping a public DNS resolver after failover but never test the original application sessions. Multiple exits are not sufficient when stateful paths become asymmetric. The appropriate acceptance test is: Remove the primary exit and inspect session continuity.

D:

Check each ISP line independently without capturing forward and reverse traffic symmetry. Multiple exits are not sufficient when stateful paths become asymmetric. The appropriate acceptance test is: Remove the primary exit and inspect session continuity.

Question 167

An industrial backbone has strict latency across redundant paths. Which response MOST directly addresses the stated network problem or requirement?

  1. Select redundant paths with no convergence bound for time-critical industrial traffic
  2. Configure a backup route whose latency exceeds the control application's tolerance
  3. Evaluate deterministic convergence and traffic-engineering constraints
  4. Measure average throughput only and ignore failover recovery time and jitter

Explanation

Correct Answer

C:

Redundancy without convergence bounds cannot satisfy time-critical flows. A direct way to confirm the outcome is to record recovery and jitter during a controlled primary path fault.

Incorrect Answers

A:

Select redundant paths with no convergence bound for time-critical industrial traffic. Redundancy without convergence bounds cannot satisfy time-critical flows. This does not implement the needed approach: evaluate deterministic convergence and traffic-engineering constraints.

B:

Configure a backup route whose latency exceeds the control application's tolerance. Redundancy without convergence bounds cannot satisfy time-critical flows. This does not implement the needed approach: evaluate deterministic convergence and traffic-engineering constraints.

D:

Measure average throughput only and ignore failover recovery time and jitter. Redundancy without convergence bounds cannot satisfy time-critical flows. This does not implement the needed approach: evaluate deterministic convergence and traffic-engineering constraints.

Question 168

An industrial backbone has strict latency across redundant paths. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Verify duplicate link presence but never simulate a primary-path loss
  2. Confirm the routing table converges eventually without measuring the permitted recovery interval
  3. Compare interface traffic volume but omit latency and jitter during the controlled failover
  4. Record recovery and jitter during a controlled primary path fault

Explanation

Correct Answer

D:

Redundancy without convergence bounds cannot satisfy time-critical flows. The result of the remedy is checked directly: Record recovery and jitter during a controlled primary path fault.

Incorrect Answers

A:

Verify duplicate link presence but never simulate a primary-path loss. Redundancy without convergence bounds cannot satisfy time-critical flows. The appropriate acceptance test is: Record recovery and jitter during a controlled primary path fault.

B:

Confirm the routing table converges eventually without measuring the permitted recovery interval. Redundancy without convergence bounds cannot satisfy time-critical flows. The appropriate acceptance test is: Record recovery and jitter during a controlled primary path fault.

C:

Compare interface traffic volume but omit latency and jitter during the controlled failover. Redundancy without convergence bounds cannot satisfy time-critical flows. The appropriate acceptance test is: Record recovery and jitter during a controlled primary path fault.

Question 169

A 192.168.50.0/24 subnet needs at least 100 usable host addresses. Which response MOST directly addresses the stated network problem or requirement?

  1. Allocate a /25 network and document the address range
  2. Reserve a /26 block for one hundred hosts despite its 62-address capacity
  3. Allocate a /27 for one hundred endpoints with only thirty usable addresses
  4. Use a /28 and expect its fourteen usable IPs to hold the full population

Explanation

Correct Answer

A:

Prefix size, not a legacy class name, controls usable capacity. A direct way to confirm the outcome is to calculate 126 usable conventional host addresses and test assignment.

Incorrect Answers

B:

Reserve a /26 block for one hundred hosts despite its 62-address capacity. Prefix size, not a legacy class name, controls usable capacity. This does not implement the needed approach: allocate a /25 network and document the address range.

C:

Allocate a /27 for one hundred endpoints with only thirty usable addresses. Prefix size, not a legacy class name, controls usable capacity. This does not implement the needed approach: allocate a /25 network and document the address range.

D:

Use a /28 and expect its fourteen usable IPs to hold the full population. Prefix size, not a legacy class name, controls usable capacity. This does not implement the needed approach: allocate a /25 network and document the address range.

Question 170

A 192.168.50.0/24 subnet needs at least 100 usable host addresses. Which diagnostic or verification check MOST directly evaluates the expected network behavior in this situation?

  1. Report 62 usable /25 addresses by counting only one quarter of the block
  2. Calculate 126 usable conventional host addresses and test assignment
  3. Count the network and broadcast addresses as two ordinary /25 clients
  4. Confirm a gateway pings but never calculate the 100-host subnet capacity

Explanation

Correct Answer

B:

Prefix size, not a legacy class name, controls usable capacity. The result of the remedy is checked directly: Calculate 126 usable conventional host addresses and test assignment.

Incorrect Answers

A:

Report 62 usable /25 addresses by counting only one quarter of the block. Prefix size, not a legacy class name, controls usable capacity. The appropriate acceptance test is: Calculate 126 usable conventional host addresses and test assignment.

C:

Count the network and broadcast addresses as two ordinary /25 clients. Prefix size, not a legacy class name, controls usable capacity. The appropriate acceptance test is: Calculate 126 usable conventional host addresses and test assignment.

D:

Confirm a gateway pings but never calculate the 100-host subnet capacity. Prefix size, not a legacy class name, controls usable capacity. The appropriate acceptance test is: Calculate 126 usable conventional host addresses and test assignment.

CompTIA Network+ (N10-009) Practice Tests

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