Huawei H12-821_V1.0 HCIP-Datacom-Core Technology V1.0 Exam Practice Test

Answer : C

Goal Analysis:

Requirement:

The route to 192.168.3.0/24 must exist in R1's and R3's routing tables.

The route must not exist in R2's routing table.

This requires filtering to ensure the route is either:

Blocked on R2's routing table (via filtering on R2), or

Blocked before it is advertised to R2.

Analysis of Each Option:

Option A (Filter-policy on R2 for filtering received routes):

Applying a filter-policy on R2 to filter received routes will block the route from entering R2's routing table but still allow it to propagate to R3.

This meets the requirement.

Option B (Filter-policy on R2 for filtering the routes to be advertised):

Blocking the advertisement of routes from R2 to other routers does not affect the routes received by R2 itself.

This does not meet the requirement but does not affect the propagation to R3.

This is valid if the received route is blocked.

Option C (Filter-policy on R1 for filtering the routes to be imported):

If the route is filtered on R1 during the import phase, the route will not exist in R1's routing table and thus cannot be advertised to either R2 or R3.

This fails to meet the requirement because the route must exist in R1's and R3's routing tables.

Option D (Filter-policy on R1 for filtering the imported routes to be advertised):

Filtering routes on R1 before advertising to R2 will prevent R2 from receiving the route but allow R1 to advertise the route to R3.

This meets the requirement.

Correct Option:

C (Filter-policy on R1 for filtering the routes to be imported): This will prevent the route from existing in both R1 and R3, violating the stated requirement.

HCIA-Datacom Study Guide, Chapter: OSPF Route Filtering

Huawei OSPF Configuration and Filtering Methods

Answer : A

Comprehensive and Detailed Step-by-Step

Firewall Session Table:

A session table is used to track active sessions. If a session remains idle for longer than the configured aging time, it is removed to free resources and enhance security.

TCP Session Timeout:

If the interval between two packets exceeds the session timeout, the firewall deletes the session information, requiring the session to be re-established.

HCIA-Datacom Study Guide, Chapter: Firewall Session Management

Huawei Firewall TCP Session Timeout Configuration

Answer : C

Comprehensive and Detailed Step-by-Step

Multi-Channel Protocols:

Multi-channel protocols use separate channels for control and data communication, requiring application-specific packet filtering (ASPF) to track sessions.

Examples:

FTP (A): Uses separate control and data channels.

SIP (B): Uses multiple ports for signaling and media.

HCIA-Datacom Study Guide, Chapter: Firewall ASPF Configuration

Huawei Multi-Channel Protocol Handling

Answer : B, D

Comprehensive and Detailed Step-by-Step

Packet Filtering Firewall:

A packet filtering firewall inspects packets at the network and transport layers based on predefined rules (e.g., ACLs).

Correct Statements:

Option B: Packet filtering is performed on a per-packet basis.

Option D: ACLs define the filtering rules for traffic.

Incorrect Statements:

Option A: Packet filtering firewalls do not analyze associated packets. For this, a stateful firewall is required.

Option C: Application-layer inspection is not supported. This functionality is provided by application-layer firewalls.

HCIA-Datacom Study Guide, Chapter: Firewalls

Huawei Firewall Packet Filtering Configuration

Answer : A

Comprehensive and Detailed Step-by-Step

Interface ID in IPv6:

The interface ID is the last 64 bits of an IPv6 address, and it uniquely identifies an interface within a subnet.

It can be generated in three ways:

Manually Configured: Explicitly assigned by an administrator.

System-Generated: The operating system assigns a random or pseudo-random value.

EUI-64 Standard: Generated based on the MAC address of the interface.

Correct Statement:

IPv6 supports all three methods for generating interface IDs.

HCIA-Datacom Study Guide, Chapter: IPv6 Address Structure

Huawei IPv6 Address Generation Methods

Let me continue with the next batch of questions!

Answer : B, D

Comprehensive and Detailed Step-by-Step

Switch Stack Overview:

In a switch stack, roles are assigned as master, standby, and slave.

The master handles configuration and control, while the standby serves as the backup master.

Behavior During Master Restart:

D: If the master switch restarts, the standby switch immediately takes over as the new master.

B: After the original master switch restarts, it becomes the master again (default behavior).

Incorrect Options:

A: The slave switch is not promoted to standby before the master switch restart completes.

C: The original standby switch remains the master after the restart.

HCIA-Datacom Study Guide, Chapter: Switch Stack Management

Huawei Switch Stack Role Transition Rules

Answer : D

Comprehensive and Detailed Step-by-Step

Route Policy Overview:

A route-policy is a policy-based routing tool that filters and modifies routing information.

It consists of one or more nodes, and each node can specify match conditions and apply actions to routes.

Maximum Number of Nodes:

The maximum number of nodes supported in a route-policy is 1024, allowing flexibility in route filtering and control.

HCIA-Datacom Study Guide, Chapter: Route-Policy Configuration

Huawei Route-Policy Configuration Guidelines