H12-811_V1.0 Exam Dumps - HCIA-Datacom V1.0 Exam

Dynamic Routing Protocol Purpose:A dynamic routing protocol's primary function is to dynamically generate and maintain routing tables by learning and sharing routing information between routers in real time. This ensures efficient path selection and adaptation to network changes​​.

Analysis of Options:

Option A: "Generate an IP address" is unrelated to routing protocols; IP address assignment is handled by DHCP or manual configuration.

Option B: "Manage routers" is inaccurate, as dynamic routing protocols do not manage router hardware or administrative tasks.

Option C: "Generate a routing table" is correct because routing protocols dynamically compute and update routing tables based on network topology changes.

Option D: "Control the status of router interfaces" refers to interface management, which is not a function of dynamic routing protocols.

Correct Answer:The main function of a dynamic routing protocol is C (Generate a routing table).

Comprehensive Explanation: In STP (Spanning Tree Protocol), ports can be in several states, including:

Discarding: The port is not forwarding traffic, either because it is in a blocking state or not participating in active forwarding.

Listening: The port is processing BPDUs and is preparing to transition to either the learning or forwarding state. No data frames are forwarded during this state.

Forwarding: The port is actively forwarding traffic as part of the active network topology.

The "Disabled" state is not part of the STP protocol but rather represents a port that is administratively shut down or not participating in the STP process.

The command lease day 0 hour 10 sets the lease time for DHCP-assigned IP addresses to 10 hours. This setting provides a short, specific lease duration for dynamically assigned IP addresses, which can be useful in networks where devices frequently join and leave, minimizing IP address retention time​.

Comprehensive Explanation: In STP (Spanning Tree Protocol), the Bridge ID (BID) is used to uniquely identify a switch in the network. It consists of a bridge priority and a MAC address. A BID with a bridge priority of 0 and a MAC address starting with 00-01 is reserved for special purposes and cannot be used in a configuration BPDU (Bridge Protocol Data Unit) sent by a regular switch. This prevents conflicts with reserved MAC addresses.

Static vs. Dynamic Routing:

Static routing: Routes manually configured by the network engineer. These do not adapt dynamically to network changes​​.

Direct routing: Routes automatically learned when a router is directly connected to a network. This is not a dynamic routing protocol​.

Dynamic Routing Protocols:

OSPF (Open Shortest Path First): A dynamic Interior Gateway Protocol (IGP) that calculates the best route based on link state information​.

BGP (Border Gateway Protocol): A dynamic Exterior Gateway Protocol (EGP) used for routing between autonomous systems​​.

Correct Answers:The dynamic routing protocols are C (OSPF) and D (BGP).

In Huawei’s VRP system, the login timeout setting is applied specifically to Virtual Terminal (VTY) interfaces, which manage remote access connections such as Telnet or SSH. Configuring a login timeout on a VTY interface helps secure remote sessions by automatically disconnecting inactive users after a specified period​.

Detailed Explanation:In a Layer 2 WLAN, an Access Controller (AC) typically handles authentication and management but does not act as a gateway. Instead, a Layer 3 device, such as a router, serves as the gateway. (Reference: HCIA-WLAN Training Material, WLAN Layer 2 and Layer 3 Concepts)