HP HPE7-A08 Practice Test 28

Question 270

A risk review for the following wired-network case asks what should be avoided: Multicast video receivers report excess streams on their access VLAN. Which assumption creates the GREATEST implementation risk?

Assuming IGMP snooping alone routes multicast between IP subnets
Disabling all multicast without checking subscribed receivers
Assuming separate VLAN broadcasts can communicate without routing
Placing an ACL only in a dashboard description without attaching it to traffic

Explanation

Correct Answer

Disabling all multicast without checking subscribed receivers. That shortcut fails because iGMP snooping limits Layer 2 multicast flooding based on membership. Instead, the appropriate approach is to use supported IGMP snooping to learn interested receiver ports and validate querier behavior.

Incorrect Answers

This misconception choice fits a different situation: Multicast must reach receivers beyond the source's local routed subnet. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to disabling all multicast without checking subscribed receivers.

This misconception choice fits a different situation: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to disabling all multicast without checking subscribed receivers.

This misconception choice fits a different situation: A user VLAN must not access a sensitive server subnet. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to disabling all multicast without checking subscribed receivers.

Question 271

Before changing switch configuration, an engineer investigates: Multicast video receivers report excess streams on their access VLAN. Which FIRST check is most useful for isolating the cause?

Inspect PIM neighbors, RPF route, group and multicast forwarding entries
Inspect port capabilities, optics inventory and negotiated link diagnostics
Inspect VSF member states, stack links and role election
Inspect IGMP group membership, VLAN snooping and querier presence

Explanation

Correct Answer

Inspect IGMP group membership, VLAN snooping and querier presence. This first check isolates the relevant mechanism without an untested configuration change. It tests the rule that iGMP snooping limits Layer 2 multicast flooding based on membership.

Incorrect Answers

This diagnostic choice fits a different situation: Multicast must reach receivers beyond the source's local routed subnet. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect IGMP group membership, VLAN snooping and querier presence.

This diagnostic choice fits a different situation: A remote rack has uplink ports but inconsistent link speeds and duplex behavior. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect IGMP group membership, VLAN snooping and querier presence.

This diagnostic choice fits a different situation: A department wants multiple 6300 access switches to behave as one manageable stack. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect IGMP group membership, VLAN snooping and querier presence.

Question 272

An implementation change is planned for: Multicast video receivers report excess streams on their access VLAN. Which preventive control BEST reduces unnecessary outage and security risk?

Verify router and source topology before enabling multicast routing
Test subscribed and unsubscribed endpoints during rollout
Stage endpoints in batches and monitor total allocated watts
Load-test the exact profile before production

Explanation

Correct Answer

Test subscribed and unsubscribed endpoints during rollout. This safeguard is appropriate before the change to use supported IGMP snooping to learn interested receiver ports and validate querier behavior; it reduces exposure to the mistake of disabling all multicast without checking subscribed receivers.

Incorrect Answers

This prevention choice fits a different situation: Multicast must reach receivers beyond the source's local routed subnet. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to test subscribed and unsubscribed endpoints during rollout.

This prevention choice fits a different situation: An access closet requires both redundant power and PoE for cameras. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to test subscribed and unsubscribed endpoints during rollout.

This prevention choice fits a different situation: A WAN uplink congests and video packets starve critical control traffic. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to test subscribed and unsubscribed endpoints during rollout.

Question 273

A first repair attempt for this situation failed: Multicast video receivers report excess streams on their access VLAN. The review found the mistaken approach of disabling all multicast without checking subscribed receivers. Which targeted recovery action BEST restores the intended design?

Restore a valid querier and correct snooping settings for the affected VLAN
Correct PIM or RPF reachability and recheck multicast forwarding state
Correct the VSX configuration and resynchronize before retesting failover
Restore management routing and validate registration without widening firewall policy

Explanation

Correct Answer

Restore a valid querier and correct snooping settings for the affected VLAN. This addresses the observed risk rather than hiding its symptoms. Confirm the repair when subscribed receivers get the intended multicast while unrelated ports avoid unnecessary flooding.

Incorrect Answers

This remediation choice fits a different situation: Multicast must reach receivers beyond the source's local routed subnet. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to restore a valid querier and correct snooping settings for the affected VLAN.

This remediation choice fits a different situation: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to restore a valid querier and correct snooping settings for the affected VLAN.

This remediation choice fits a different situation: An on-site switch cannot reach Central after initial cabling. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to restore a valid querier and correct snooping settings for the affected VLAN.

Question 274

An HPE Aruba Networking engineer faces this wired-network scenario: Multicast must reach receivers beyond the source's local routed subnet. Which implementation action BEST addresses the requirement?

Use supported IGMP snooping to learn interested receiver ports and validate querier behavior
Design appropriate PIM-enabled multicast routing and compatible unicast reachability
Define appropriate DSCP/CoS trust boundaries and class-to-queue mapping
Configure a consistent MSTP region and root strategy for the bridged topology

Explanation

Correct Answer

Routed multicast distribution requires the appropriate multicast routing control plane. The targeted implementation is to design appropriate PIM-enabled multicast routing and compatible unicast reachability. The deployment succeeds when receiver groups join across routed boundaries through expected multicast state.

Incorrect Answers

This implementation choice fits a different situation: Multicast video receivers report excess streams on their access VLAN. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to design appropriate PIM-enabled multicast routing and compatible unicast reachability.

This implementation choice fits a different situation: Voice traffic marked at a trusted phone should retain priority over bulk backups. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to design appropriate PIM-enabled multicast routing and compatible unicast reachability.

This implementation choice fits a different situation: Two access layers see periodic Layer 2 loops after a redundant cable is installed. It does not resolve the stated failure mode. For this case, the decisive implementation choice is to design appropriate PIM-enabled multicast routing and compatible unicast reachability.

Question 275

After implementing the approved change — Design appropriate PIM-enabled multicast routing and compatible unicast reachability — for this scenario: Multicast must reach receivers beyond the source's local routed subnet. Which observed result BEST verifies the outcome?

Subscribed receivers get the intended multicast while unrelated ports avoid unnecessary flooding
Employees and contractors receive distinct authorized access on the same physical port
A known interface-failure alert creates one correlated incident with device details
Receiver groups join across routed boundaries through expected multicast state

Explanation

Correct Answer

Receiver groups join across routed boundaries through expected multicast state. This is the observable acceptance evidence for the decision to design appropriate PIM-enabled multicast routing and compatible unicast reachability. It demonstrates the principle that routed multicast distribution requires the appropriate multicast routing control plane.

Incorrect Answers

This verification choice fits a different situation: Multicast video receivers report excess streams on their access VLAN. It does not resolve the stated failure mode. For this case, the decisive verification choice is to receiver groups join across routed boundaries through expected multicast state.

This verification choice fits a different situation: A campus uses ClearPass to assign different roles to employees and contractors. It does not resolve the stated failure mode. For this case, the decisive verification choice is to receiver groups join across routed boundaries through expected multicast state.

This verification choice fits a different situation: An operations team wants a switch event to trigger external incident handling. It does not resolve the stated failure mode. For this case, the decisive verification choice is to receiver groups join across routed boundaries through expected multicast state.

Question 276

An HPE Aruba Networking design review examines: Multicast must reach receivers beyond the source's local routed subnet. Which technical principle BEST explains the required approach?

IGMP snooping limits Layer 2 multicast flooding based on membership
Routed multicast distribution requires the appropriate multicast routing control plane
VSX multi-chassis LAG operation depends on peer and downstream consistency
DHCP broadcast discovery does not inherently traverse routers without relay

Explanation

Correct Answer

Routed multicast distribution requires the appropriate multicast routing control plane. The case therefore calls for this specifically controlled action: design appropriate PIM-enabled multicast routing and compatible unicast reachability. The acceptance evidence is that receiver groups join across routed boundaries through expected multicast state.

Incorrect Answers

This principle choice fits a different situation: Multicast video receivers report excess streams on their access VLAN. It does not resolve the stated failure mode. For this case, the decisive principle choice is to routed multicast distribution requires the appropriate multicast routing control plane.

This principle choice fits a different situation: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. It does not resolve the stated failure mode. For this case, the decisive principle choice is to routed multicast distribution requires the appropriate multicast routing control plane.

This principle choice fits a different situation: A client VLAN needs addresses from a DHCP server in another routed subnet. It does not resolve the stated failure mode. For this case, the decisive principle choice is to routed multicast distribution requires the appropriate multicast routing control plane.

Question 277

A risk review for the following wired-network case asks what should be avoided: Multicast must reach receivers beyond the source's local routed subnet. Which assumption creates the GREATEST implementation risk?

Disabling all multicast without checking subscribed receivers
Assuming separate VLAN broadcasts can communicate without routing
Assuming an unlimited upstream sender cannot congest a slower downstream link
Assuming IGMP snooping alone routes multicast between IP subnets

Explanation

Correct Answer

Assuming IGMP snooping alone routes multicast between IP subnets. That shortcut fails because routed multicast distribution requires the appropriate multicast routing control plane. Instead, the appropriate approach is to design appropriate PIM-enabled multicast routing and compatible unicast reachability.

Incorrect Answers

This misconception choice fits a different situation: Multicast video receivers report excess streams on their access VLAN. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming IGMP snooping alone routes multicast between IP subnets.

This misconception choice fits a different situation: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming IGMP snooping alone routes multicast between IP subnets.

This misconception choice fits a different situation: A bulk replication flow overwhelms a lower-speed intersite uplink. It does not resolve the stated failure mode. For this case, the decisive misconception choice is to assuming IGMP snooping alone routes multicast between IP subnets.

Question 278

Before changing switch configuration, an engineer investigates: Multicast must reach receivers beyond the source's local routed subnet. Which FIRST check is most useful for isolating the cause?

Inspect IGMP group membership, VLAN snooping and querier presence
Inspect PIM neighbors, RPF route, group and multicast forwarding entries
Inspect peer state, VSX synchronization and LACP status on both sides
Inspect HTTPS access, REST version and authorization scope

Explanation

Correct Answer

Inspect PIM neighbors, RPF route, group and multicast forwarding entries. This first check isolates the relevant mechanism without an untested configuration change. It tests the rule that routed multicast distribution requires the appropriate multicast routing control plane.

Incorrect Answers

This diagnostic choice fits a different situation: Multicast video receivers report excess streams on their access VLAN. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect PIM neighbors, RPF route, group and multicast forwarding entries.

This diagnostic choice fits a different situation: Two aggregation switches use VSX, but a downstream dual-homed LAG drops on peer failure. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect PIM neighbors, RPF route, group and multicast forwarding entries.

This diagnostic choice fits a different situation: A network management tool needs to read interface status from AOS-CX switches. It does not resolve the stated failure mode. For this case, the decisive diagnostic choice is to inspect PIM neighbors, RPF route, group and multicast forwarding entries.

Question 279

An implementation change is planned for: Multicast must reach receivers beyond the source's local routed subnet. Which preventive control BEST reduces unnecessary outage and security risk?

Test subscribed and unsubscribed endpoints during rollout
Validate an end-to-end VLAN propagation matrix in staging
Check access policy and bidirectional path before enabling routing
Verify router and source topology before enabling multicast routing

Explanation

Correct Answer

Verify router and source topology before enabling multicast routing. This safeguard is appropriate before the change to design appropriate PIM-enabled multicast routing and compatible unicast reachability; it reduces exposure to the mistake of assuming IGMP snooping alone routes multicast between IP subnets.

Incorrect Answers

This prevention choice fits a different situation: Multicast video receivers report excess streams on their access VLAN. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to verify router and source topology before enabling multicast routing.

This prevention choice fits a different situation: Two switches must exchange VLAN 20 and VLAN 30 but a user in VLAN 30 cannot cross the uplink. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to verify router and source topology before enabling multicast routing.

This prevention choice fits a different situation: Hosts in two routed VLANs cannot communicate even though each VLAN has local connectivity. It does not resolve the stated failure mode. For this case, the decisive prevention choice is to verify router and source topology before enabling multicast routing.

Question 280

A first repair attempt for this situation failed: Multicast must reach receivers beyond the source's local routed subnet. The review found the mistaken approach of assuming IGMP snooping alone routes multicast between IP subnets. Which targeted recovery action BEST restores the intended design?

Restore a valid querier and correct snooping settings for the affected VLAN
Replace incompatible modules or patching and retest the optical path
Correct PIM or RPF reachability and recheck multicast forwarding state
Fix duplicate event correlation and verify incident suppression logic

Explanation

Correct Answer

Correct PIM or RPF reachability and recheck multicast forwarding state. This addresses the observed risk rather than hiding its symptoms. Confirm the repair when receiver groups join across routed boundaries through expected multicast state.

Incorrect Answers

This remediation choice fits a different situation: Multicast video receivers report excess streams on their access VLAN. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct PIM or RPF reachability and recheck multicast forwarding state.

This remediation choice fits a different situation: A fiber uplink between two buildings never reaches operational up state. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct PIM or RPF reachability and recheck multicast forwarding state.

This remediation choice fits a different situation: An operations team wants a switch event to trigger external incident handling. It does not resolve the stated failure mode. For this case, the decisive remediation choice is to correct PIM or RPF reachability and recheck multicast forwarding state.

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Pass Your HP HPE7-A08 Exam Easy!

Question 270

Explanation

Correct Answer

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Question 271

Explanation

Correct Answer

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Question 272

Explanation

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Question 273

Explanation

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Question 274

Explanation

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Question 275

Explanation

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Question 276

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Question 277

Explanation

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Question 278

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Question 279

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Question 280

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HPE Network Switching Professional (HPE7-A08) Practice Tests