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Huawei H12-821_V1.0 Customized Lab Simulation & Real H12-821_V1.0 Torrent
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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q145-Q150):
NEW QUESTION # 145
By default, some security zones are created when Huawei firewalls are enabled. Which of the following security zones is created by users?
- A. DMZ
- B. ISP
- C. Local
- D. Trust
Answer: A
Explanation:
By default, Huawei firewalls create security zones such as Trust, Untrust, and Local. The DMZ (Demilitarized Zone) is a security zone explicitly created by users. A DMZ is used to isolate an internal network from the external one, providing an additional layer of security by placing public-facing services (e.
g., web servers) in this intermediary zone. This setup ensures that if a public-facing service is compromised, the internal network remains secure. Huawei Firewall configuration steps confirm this zoning principle, making DMZ creation an explicit user-driven action .
NEW QUESTION # 146
To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non- backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
OSPF (Open Shortest Path First) mandates that the backbone area (Area 0) serves as the central area for routing information exchange. To avoid inter-area routing loops, routing information is only exchanged between the backbone area and non-backbone areas, not directly between two non-backbone areas.
Consequently, each Area Border Router (ABR) must connect to the backbone area to facilitate this routing exchange .
NEW QUESTION # 147
On the OSPF network shown in the figure, an adjacency has been established between R1 and R2. An engineer configures the commands in the figure on R2. In this case, which of the following routing entries may exist in the routing table of R2?
- A. 10.1.1.0/24
- B. 10.1.2.0/24
- C. 10.1.3.0/24
- D. 10.1.4.0/24
Answer: B,C,D
Explanation:
Configuration Analysis:
* On R2, the following configuration has been applied:
acl 200
rule deny source 10.1.0.0 0.0.3.0
rule permit
#
ospf 1
filter-policy 2000 import
* This configuration uses ACL 200 to filter routes during import into the OSPF routing table on R2.
* Rule deny source 10.1.0.0 0.0.3.0: Blocks routes in the range 10.1.0.0/24 to 10.1.3.0/24 (inclusive).
* Rule permit: Allows all other routes to be imported.
* Impact of ACL 200 on Route Import:
* 10.1.0.0/24 to 10.1.3.0/24: These subnets are explicitly denied by ACL 200 and will not appear in R2's routing table.
* 10.1.4.0/24 and beyond: These subnets are permitted by the rule permit statement and will be imported into R2's routing table.
* Routing Table Entries on R2:
* Option A (10.1.4.0/24): Exists in R2's routing table because it is permitted.
* Option B (10.1.3.0/24): Does not exist because it is denied by ACL 200.
* Option C (10.1.2.0/24): Does not exist because it is denied by ACL 200.
* Option D (10.1.1.0/24): Does not exist because it is denied by ACL 200.
* A (10.1.4.0/24)
Correct Options:References:
* HCIA-Datacom Study Guide, Chapter: OSPF Route Filtering
* Huawei ACL Configuration for Route Policies
NEW QUESTION # 148
BGP is a distance-vector protocol that implements route reachability between ASs and selects optimal routes.
Which of the following statements are true about this protocol?
- A. BGP provides various routing policies.
- B. BGP does not support authentication. Therefore, it cannot ensure network security.
- C. BGP supports automatic peer discovery.
- D. BGP uses TCP as the transport layer protocol.
Answer: A,D
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. Overview of BGP:
BGP (Border Gateway Protocol) is an Exterior Gateway Protocol (EGP) designed to exchange routing information between different Autonomous Systems (ASs) on the internet. Unlike traditional distance-vector protocols (like RIP), BGP is considered a path-vector protocol, as it not only determines reachability but also ensures policy-based routing decisions and advanced path selection mechanisms.
2. Analysis of Each Option:
Option A: BGP does not support authentication. Therefore, it cannot ensure network security.
* This statement is incorrect.
* BGP supports authentication using mechanisms such as TCP MD5 (Message Digest 5) and TCP-AO (Authentication Option). These authentication mechanisms ensure that BGP messages are not tampered with or intercepted during transmission, enhancing network security.
NEW QUESTION # 149
ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true?
- A. By default, when status detection is disabled and the permit policy is configured packets can pass.
- B. If the firewall security policy permits packets to pass, the session table is created.
- C. If the firewall security policy permits packets to pass, the packets can pass the firewall.
- D. Packets must pass the firewall, and a session table is established.
Answer: C
NEW QUESTION # 150
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