HCIP-Datacom H12-821_V1.0 Book

In the provided configuration, IS-IS is enabled on Loopback0 but not on Loopback3 of R2. As a result, R2 will advertise the route 10.0.2.2/32 (from Loopback0) to R1 through IS-IS. However, the route 10.0.2.3/32 will not be advertised because IS-IS is not enabled on that loopback interface. The import-route direct command does not override this behavior ​.

RSTP improves convergence by introducing changes to the BPDU handling mechanism and port roles. However, RSTP does not rely on a fixed timeout of four Hello intervals for negotiation failure. Instead, RSTP uses a more dynamic mechanism to detect topology changes. The other options describe valid RSTP improvements ​.

The default sending interval for BFD (Bidirectional Forwarding Detection) control packets is 100 milliseconds. This interval ensures rapid detection of link faults, providing fast failover and minimizing downtime in network operations ​.

Comprehensive and Detailed Step-by-Step Explanation:

Understanding the ACL Configuration:

ACL Number: 3001 is an advanced ACL.

Rule Description: The rule permits ICMP packets with the following criteria:

Source IP: 192.168.1.3 (host-specific).

Destination IP: 192.168.2.0/24 (entire subnet).

Analysis of Each Option:

Option A: True. ICMP packets from 192.168.1.3 to 192.168.2.200 (within the subnet) are permitted.

Option B: True. Packets from 192.168.1.2 (not matching the source) are denied by default.

Option C: False. The ACL only permits ICMP packets, not general IP packets.

Option D: True. The ACL is identified by the number 3001.

References:

HCIA-Datacom Study Guide, Chapter: ACL Filtering Rules

Huawei Advanced ACL Configuration