CompTIA N10-009 Practice Test 16

Question 150

A network specialist investigates this evidence: A technician gives 192.168.40.64/26 as a host gateway even though the interface rejects it. Which underlying condition BEST explains the observed failure or requirement?

A /28 provides only 14 usable hosts and cannot meet capacity.
192.168.40.64 is the network address of that /26 block.
127.0.0.0/8 is local host loopback, not a routed destination.
The endpoint did not receive a usable DHCP lease.

Explanation

Correct Answer

192.168.40.64 is the network address of that /26 block. A /26 has 64-address blocks and reserves network and broadcast.

Incorrect Answers

A /28 provides only 14 usable hosts and cannot meet capacity.

127.0.0.0/8 is local host loopback, not a routed destination. That does not establish 192.168.40.64 is the network address of that /26 block.

The endpoint did not receive a usable DHCP lease. 169.254.0.0/16 link-local addresses commonly indicate DHCP acquisition failure. The missing change involves 192.168.40.64 is the network address of that /26 block.

Question 151

A network team observes: A /24 must support 100 users, 40 phones and a 10-device operations segment without overlaps. What is the MOST appropriate corrective action or technical decision?

Choose an appropriate nonoverlapping RFC1918 subnet such as 10.44.0.0/16.
Use the remote server's valid network address or DNS name.
Allocate /25, /26 and /28 blocks largest-first with no overlap.
Renumber or implement a deliberate temporary translation plan for the overlapping networks.

Explanation

Correct Answer

Uniform small subnets cannot accommodate different host counts.

Incorrect Answers

Choosing an appropriate nonoverlapping RFC1918 subnet such as 10.44.0.0/16 would not address the need for allocate /25, /26 and /28 blocks largest-first with no overlap.

Using the remote server's valid network address or DNS name would not address the need for allocate /25, /26 and /28 blocks largest-first with no overlap.

Renumber or implement a deliberate temporary translation plan for the overlapping networks would not address the need for allocate /25, /26 and /28 blocks largest-first with no overlap.

Question 152

A network team addresses this situation: A /24 must support 100 users, 40 phones and a 10-device operations segment without overlaps. After the corrective action, which test or result BEST verifies that the problem is resolved?

Inspect internal addressing and confirm no unintended overlap with routed WAN prefixes.
Test uniquely translated destinations from each site and inspect routes.
Capture outgoing interface traffic and verify loopback packets never leave.
Calculate each subnet range and compare against the parent prefix.

Explanation

Correct Answer

Nonoverlapping ranges with sufficient hosts validate VLSM.

Incorrect Answers

Address-plan review proves private-use selection and unique allocation. That check cannot demonstrate calculate each subnet range and compare against the parent prefix.

Test uniquely translated destinations from each site and inspect routes. That check cannot demonstrate calculate each subnet range and compare against the parent prefix.

No external packets demonstrates the local-only address. That check cannot demonstrate calculate each subnet range and compare against the parent prefix.

Question 153

A network team observes: A router has 10.44.0.0/16 via WAN A and 10.44.8.0/24 via WAN B; traffic to 10.44.8.40 follows B. What is the MOST appropriate corrective action or technical decision?

Keep or correct the /24 entry if WAN B is the intended specific path.
Renumber or implement a deliberate temporary translation plan for the overlapping networks.
Use the remote server's valid network address or DNS name.
Allocate /25, /26 and /28 blocks largest-first with no overlap.

Explanation

Correct Answer

Route lookup prefers longest matching mask before generic alternatives. Longest-prefix match selects the most specific route.

Incorrect Answers

Renumber or implement a deliberate temporary translation plan for the overlapping networks would not keep or correct the /24 entry if WAN B is the intended specific path.

Using the remote server's valid network address or DNS name would not keep or correct the /24 entry if WAN B is the intended specific path.

Allocate /25, /26 and /28 blocks largest-first with no overlap would not keep or correct the /24 entry if WAN B is the intended specific path.

Question 154

A network team addresses this situation: A router has 10.44.0.0/16 via WAN A and 10.44.8.0/24 via WAN B; traffic to 10.44.8.40 follows B. After the corrective action, which test or result BEST verifies that the problem is resolved?

Test uniquely translated destinations from each site and inspect routes.
Inspect route lookup for 10.44.8.40 and a different /16 host.
Calculate each subnet range and compare against the parent prefix.
Capture outgoing interface traffic and verify loopback packets never leave.

Explanation

Correct Answer

Inspect route lookup for 10.44.8.40 and a different /16 host.

Incorrect Answers

Test uniquely translated destinations from each site and inspect routes. It does not inspect route lookup for 10.44.8.40 and a different /16 host.

Nonoverlapping ranges with sufficient hosts validate VLSM. It does not inspect route lookup for 10.44.8.40 and a different /16 host.

No external packets demonstrates the local-only address. It does not inspect route lookup for 10.44.8.40 and a different /16 host.

Question 155

A network specialist investigates this evidence: A router has 10.44.0.0/16 via WAN A and 10.44.8.0/24 via WAN B; traffic to 10.44.8.40 follows B. Which underlying condition BEST explains the observed failure or requirement?

Overlapping RFC1918 prefixes make remote destinations ambiguous.
The endpoint did not receive a usable DHCP lease.
Longest-prefix match selects the most specific route.
127.0.0.0/8 is local host loopback, not a routed destination.

Explanation

Correct Answer

Longest-prefix match selects the most specific route. Route lookup prefers longest matching mask before generic alternatives.

Incorrect Answers

Overlapping RFC1918 prefixes make remote destinations ambiguous. That does not establish longest-prefix match selects the most specific route.

The endpoint did not receive a usable DHCP lease. 169.254.0.0/16 link-local addresses commonly indicate DHCP acquisition failure. The missing change involves longest-prefix match selects the most specific route.

127.0.0.0/8 is local host loopback, not a routed destination. That does not establish longest-prefix match selects the most specific route.

Question 156

A network team observes: A developer sends traffic to 127.0.0.1 expecting another server in the data center to receive it. What is the MOST appropriate corrective action or technical decision?

Choose a valid host such as 192.168.40.65 within the /26.
Restore DHCP path or relay rather than routing APIPA to the internet.
Allocate /25, /26 and /28 blocks largest-first with no overlap.
Use the remote server's valid network address or DNS name.

Explanation

Correct Answer

Loopback traffic remains within the local IP stack. 127.0.0.0/8 is local host loopback, not a routed destination.

Incorrect Answers

Choosing a valid host such as 192.168.40.65 within the /26 would not meet the need for DNS configuration.

Restoring DHCP path or relay rather than routing APIPA to the internet would not meet the need for DNS configuration.

Allocate /25, /26 and /28 blocks largest-first with no overlap would not meet the need for DNS configuration.

Question 157

A network team addresses this situation: A developer sends traffic to 127.0.0.1 expecting another server in the data center to receive it. After the corrective action, which test or result BEST verifies that the problem is resolved?

Capture outgoing interface traffic and verify loopback packets never leave.
Calculate block boundaries and ping the assigned host address.
Inspect internal addressing and confirm no unintended overlap with routed WAN prefixes.
Enumerate subnet network, usable range and broadcast with the intended host count.

Explanation

Correct Answer

No external packets demonstrates the local-only address.

Incorrect Answers

Calculate block boundaries and ping the assigned host address. It does not capture outgoing interface traffic and verify loopback packets never leave.

Address-plan review proves private-use selection and unique allocation. It does not capture outgoing interface traffic and verify loopback packets never leave.

Enumerate subnet network, usable range and broadcast with the intended host count. It does not capture outgoing interface traffic and verify loopback packets never leave.

Question 158

A network specialist investigates this evidence: A developer sends traffic to 127.0.0.1 expecting another server in the data center to receive it. Which underlying condition BEST explains the observed failure or requirement?

192.168.40.64 is the network address of that /26 block.
127.0.0.0/8 is local host loopback, not a routed destination.
A /28 provides only 14 usable hosts and cannot meet capacity.
Documentation address space is not RFC1918 private allocation.

Explanation

Correct Answer

127.0.0.0/8 is local host loopback, not a routed destination. Loopback traffic remains within the local IP stack.

Incorrect Answers

192.168.40.64 is the network address of that /26 block. That does not establish 127.0.0.0/8 is local host loopback, not a routed destination.

A /28 provides only 14 usable hosts and cannot meet capacity. The missing change involves 127.0.0.0/8 is local host loopback, not a routed destination.

Documentation address space is not RFC1918 private allocation. That does not establish 127.0.0.0/8 is local host loopback, not a routed destination.

Question 159

A network team observes: A merger connects two offices using the same 10.20.0.0/16 internal prefix, breaking route reachability across the WAN. What is the MOST appropriate corrective action or technical decision?

Choose an appropriate nonoverlapping RFC1918 subnet such as 10.44.0.0/16.
Keep or correct the /24 entry if WAN B is the intended specific path.
Renumber or implement a deliberate temporary translation plan for the overlapping networks.
Allocate a nonoverlapping /27 with 30 usable addresses.

Explanation

Correct Answer

Routing alone cannot distinguish identical remote address ranges. Overlapping rfc1918 prefixes make remote destinations ambiguous.

Incorrect Answers

Choosing an appropriate nonoverlapping RFC1918 subnet such as 10.44.0.0/16 would not address the need for renumber or implement a deliberate temporary translation plan for the overlapping networks.

Keeping or correct the /24 entry if WAN B is the intended specific path would not address the need for renumber or implement a deliberate temporary translation plan for the overlapping networks.

Allocate a nonoverlapping /27 with 30 usable addresses would not address the need for renumber or implement a deliberate temporary translation plan for the overlapping networks.

Question 160

A network team addresses this situation: A merger connects two offices using the same 10.20.0.0/16 internal prefix, breaking route reachability across the WAN. After the corrective action, which test or result BEST verifies that the problem is resolved?

Inspect internal addressing and confirm no unintended overlap with routed WAN prefixes.
Inspect route lookup for 10.44.8.40 and a different /16 host.
Renew the DHCP lease and verify a valid scope address and gateway.
Test uniquely translated destinations from each site and inspect routes.

Explanation

Correct Answer

Test uniquely translated destinations from each site and inspect routes.

Incorrect Answers

Address-plan review proves private-use selection and unique allocation. It does not test uniquely translated destinations from each site and inspect routes.

Inspect route lookup for 10.44.8.40 and a different /16 host. It does not test uniquely translated destinations from each site and inspect routes.

A proper DHCP offer displaces the link-local fallback. It does not test uniquely translated destinations from each site and inspect routes.

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Pass Your CompTIA N10-009 Exam Easy!

Question 150

Explanation

Correct Answer

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Question 151

Explanation

Correct Answer

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Question 152

Explanation

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Question 153

Explanation

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Question 154

Explanation

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Question 155

Explanation

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Question 156

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Question 157

Explanation

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Question 158

Explanation

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Question 159

Explanation

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Question 160

Explanation

Correct Answer

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CompTIA Network+ (N10-009) Practice Tests