H3C GB0-372 Certification Exam Sample Questions and Answers

Before you write the H3C Advanced Routing and Switching Technology (GB0-372) certification exam, you may have certain doubts in your mind regarding the pattern of the test, the types of questions asked in it, the difficulty level of the questions and time required to complete the questions. These H3C Certified Senior Engineer for Routing & Switching Plus (H3CSE-RS+) sample questions and demo exam help you in removing these doubts and prepare you to take the test.

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H3C GB0-372 (H3CSE-RS+) Sample Questions:

01. On one access VLAN of a water utility's operations network, every port receives a video stream although only three ports host subscribed receivers, and the switch's uplink counters show that VLAN saturating. Multicast routing between VLANs is working correctly elsewhere in the network.

Which action addresses the symptom, and why?

a) Enable a check against the source on the VLAN, because a switch has to validate the stream's arrival interface before it can restrict a group to particular ports.

b) Enable IGMP Snooping on the access VLAN, because a switch has to read the membership reports before it can restrict a group to particular ports.

c) Configure the group into a multicast VLAN, because a switch has to carry a group in a dedicated VLAN before it can restrict it to particular ports.

d) Enable PIM-SM on the VLAN interface, because a switch has to build a distribution tree before it can restrict a group to particular ports.

02. A broadcast facility finds that some link-down notifications from its remote encoder sites never appear in the management platform, although each device recorded the event in its own local log. The path between the sites crosses a heavily congested link. The team proposes reconfiguring those devices to send Inform notifications instead of Traps.

Why does that change address the loss?

a) An Inform is generated with a higher priority marking than a Trap, so the congested link, already saturated, forwards it ahead of routine polling traffic.

b) Inform messages are carried over TCP rather than UDP, so the transport layer, not the application, retransmits any segment the congested link discards.

c) An Inform is buffered by the manager, which replays it to the agent later, so the agent can rebuild the notifications it failed to deliver.

d) An Inform is acknowledged by the manager, so the agent retransmits it when no acknowledgement arrives, whereas a Trap is sent once and never confirmed.

03. Two routers at a municipal office back up the users' default gateway with VRRP. Whenever the higher-priority router is rebooted for maintenance the other router takes over cleanly, but the role returns to the maintenance router as soon as it comes back, and a brief forwarding interruption accompanies each return. The operations team wants the role to stay where it is until they move it deliberately.

Which setting accounts for the behaviour they are seeing?

a) The two routers use different advertisement intervals, so the router that advertises sooner after a recovery reclaims the role from the other.

b) Preemption is enabled on the group, so a recovered router that holds the higher priority takes the master role back automatically.

c) Interface tracking is configured on the group, so the recovered router's restored uplink lifts its priority above that of the acting master.

d) The higher-priority router owns the virtual MAC address, so the role follows that router again whenever the network can reach it.

04. A newly added aggregation router in one building of a PIM-SM domain delivers no group traffic to its receivers, while the rest of the domain is unaffected. The mode is enabled on its interfaces and it has formed neighbours in both directions, but bootstrap messages are being filtered on the path towards it, so it has learned no RP for the groups concerned.

Which two consequences follow directly?

(Choose two.)

a) Its shared tree switches over to a shortest-path tree, because an RP that cannot be resolved is treated as an unreachable root and bypassed.

b) Traffic from a source attached locally is never registered towards the shared tree, so receivers elsewhere in the domain do not learn that it exists.

c) Membership reports from its receivers produce no join towards the shared tree, because the router holds no RP address to direct such a join at.

d) Its check against the source fails for the group, because a router that holds no RP information treats each incoming interface as unverified.

e) Its neighbours drop the adjacency with it, because a sparse-mode router that holds no RP information stops issuing its own Hello messages.

05. An aggregation switch at a data centre edge routes between VLAN 40 and VLAN 50 using Vlan-interface 40 and Vlan-interface 50, both addressed correctly and neither administratively shut down. After a maintenance window in which the last two access ports in VLAN 50 were disabled, hosts in VLAN 40 can no longer reach the VLAN 50 subnet and the switch no longer shows a connected route for it.

What accounts for the missing route?

a) The switch withdrew the route because no host in VLAN 50 has sent any traffic since the window ended.

b) The Layer 3 configuration was lost during the maintenance window, so the interface address must be reapplied manually.

c) A VLAN interface stays up only while a member port is up, so it went down with the last one.

d) Inter-VLAN routing requires both VLANs to carry traffic, so an idle VLAN is removed from the routing table.

06. During a service-affecting incident on a stadium operations network, the centralised log collector is taking tens of thousands of messages a minute from the access layer, and the on-call engineer cannot locate the events that matter among them.

Which two uses of syslog severity help the engineer separate signal from noise?

(Choose two.)

a) Raise the severity configured on every access switch so that all of its messages are re-classified upward and none of them can be filtered out of the incident view by mistake.

b) Restrict which severities each device is permitted to send to the collector, so that routine informational and debug output never consumes ingest capacity during an incident.

c) Configure the collector to discard any message whose severity value it does not recognise, so that only devices running a comparable logging implementation are retained in the view.

d) Filter the collector's incident view to the more severe levels first, so that critical and error class events surface ahead of the informational chatter the access layer produces.

e) Sort the incident view by numeric severity in ascending order of arrival, so that the busiest device's messages are grouped together and can then be reviewed as a single block.

07. A research institute is moving its management platform and its device agents from SNMP v1 to v2c. Before scheduling the work the team wants to be clear about what the version change actually buys them.

Which two statements describe capabilities that v2c added over v1?

(Choose two.)

a) It introduces GetBulk, which retrieves a large table such as a full set of interface counters in far fewer request-response exchanges than repeated GetNext walks.

b) It introduces user-based authentication and payload encryption, so management traffic no longer depends on a clear-text community string.

c) It introduces Inform, an acknowledged notification, together with a richer error-status set that reports why a request failed rather than a single generic error.

d) It introduces a transport change from UDP to TCP for both polling and notifications, so an overloaded agent no longer silently drops the requests sent to it.

e) It introduces per-object access views, so a community string can be limited to a subset of the managed object tree without otherwise changing the agent.

08. In a school district's network, staff who authenticate through 802.1X consistently land in the guest VLAN instead of the staff VLAN. The behaviour follows them across access switches in two separate buildings. Guests using the very same ports land where they should, the access ports are configured as they were before the district migrated its directory, and the switches' local VLAN configuration has not been touched.

Where does the fault most likely lie?

a) In the authorisation attribute returned for the staff group at authentication, which now names the guest VLAN and is applied by every switch.

b) In the EAP method negotiated by the staff supplicants, which returns a group identity the switches map to their default VLAN.

c) In the trunk uplinks from each access switch, which are pruning the staff VLAN and forcing authenticated sessions onto the only permitted VLAN.

d) In the access ports' PVID, which is overriding the VLAN the switch would otherwise assign after a successful authentication.

09. A stadium operations network reaches some of its remote plant over links that run a dynamic routing protocol and others over statically routed links. The designers require sub-second detection of a link failure on both kinds of path, and they are unwilling to change either routing design to obtain it.

Which two statements describe how BFD meets this requirement?

(Choose two.)

a) BFD removes the affected routes from the forwarding table itself, so the client protocols learn of the failure from the table afterwards.

b) BFD runs a lightweight detection session of its own over the link, independently of which routing protocol the link is carrying.

c) BFD runs as an extension inside each routing protocol, so a separate session is established for every protocol enabled on the link.

d) BFD takes over the hello mechanism of each client protocol, so the protocol's own adjacency timers are no longer used on that link.

e) BFD notifies its registered client protocols when the session goes down, so each client reconverges without waiting for its own timers.

10. A logistics depot has one budget line left for its aggregation block. The team can either replace the two aggregation switches with a model whose published failure rate is roughly a third lower, or deploy sub-second failure detection and an automated failover procedure that would cut the time to restore service from about forty minutes to under a minute.

Which reasoning correctly identifies the change that moves measured availability further?

a) The lower-failure-rate hardware, because availability is governed by how often the block fails, and a third fewer failure events each year removes a proportionate share of the annual downtime budget

b) The faster detection and failover, because cutting restoration from forty minutes to under a minute removes far more downtime than a third fewer events, and it shortens every remaining incident

c) Neither, because both changes act on the same term of the availability formula, and the depot should instead add a third aggregation switch to the existing block

d) The lower-failure-rate hardware, because automated failover only masks a fault, and the availability figure counts the underlying failure event whether or not service was restored within a minute

Solutions:

Question: 01

Answer: b

Question: 02

Answer: d

Question: 03

Answer: b

Question: 04

Answer: b, c

Question: 05

Answer: c

Question: 06

Answer: b, d

Question: 07

Answer: a, c

Question: 08

Answer: a

Question: 09

Answer: b, e

Question: 10

Answer: b

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H3C GB0-372 Certification Exam Sample Questions and Answers

H3C GB0-372 (H3CSE-RS+) Sample Questions:

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