Huawei Updated H12-821_V1.0 Exam Questions and Answers by paddy

 Understanding BGP Route Summarization:

In Border Gateway Protocol (BGP),route summarizationis a technique used to aggregate multiple specific prefixes into a broader summary prefix. This reduces the size of routing tables and improves routing efficiency.

Summarization helps to hide unnecessary details from other parts of the network while still maintaining connectivity.

HCIP-Datacom-Core Technology Training Material (BGP Route Summarization)​​.

 Suppressing Specific Routes:

When summarizing routes, thesuppress-spec-map keywordis used to suppress specific prefixes so that only the summarized route is advertised.

The suppressed routes are not advertised to BGP peers; instead, only the summary route is propagated.

According to BGP route selection rules, a higherLocal_Prefvalue indicates a more preferred route. This rule is used to influence traffic flow within an autonomous system (AS), giving preference to routes with a higherLocal_Preffor outgoing traffic ​.

Comprehensive and Detailed In-Depth Explanation:

OSPF network typesaffect how protocol packets (Hello, LSA updates) are transmitted:

NBMA (Non-Broadcast Multi-Access)networks (e.g., Frame Relay) donot support multicast, so routers mustunicastOSPF packets to neighbors.

Broadcast networks(e.g., Ethernet) supportmulticastand use224.0.0.5 for Hello packetsand224.0.0.6 for DR/BDR communication.

The statement isfalsebecause:

NBMA does not unicast all packets—only Hello packets must bemanually configuredto be unicast.

LSAs and routing updates can still be multicastif an NBMA network is configured aspoint-to-multipoint.

????Reference:Huawei HCIA-Datacom Study Guide, OSPF Network Types and Packet Transmission.

SSL VPN and Its Functionality:

SSL VPN (Secure Sockets Layer Virtual Private Network) provides secure remote access to a network using SSL/TLS protocols.

SSL VPN operates at theApplication Layerof the OSI model. It enables secure communication for applications like web browsers, email clients, and file sharing.

Unlike IPsec VPN, which operates at the Network Layer, SSL VPN focuses on application-specific encryption and authentication.

HCIP-Security Training Material (VPN Basics and SSL VPN Configuration)​​.