Huawei Updated H12-811_V1.0 Exam Questions and Answers by fallon

Comprehensive and Detailed Explanation:

The TTL field is 8 bits long, allowing values from 0 to 255 (A is correct).

The TTL prevents routing loops by discarding packets with TTL=0 (B is correct).

Each Layer 3 device (router) that forwards the packet decrements TTL by 1 (C is correct).

If TTL reaches zero, the router drops the packet and sends an ICMP Time Exceeded message.

✅ Reference: HCIA-Datacom Network Principles Guide – IP Packet Structure

Comprehensive and Detailed Explanation:

Huawei's Versatile Routing Platform (VRP) supports various shortcut keys for efficient command-line navigation:

CTRL+Z → Moves the user back to User View from any configuration mode. ✅

Left Cursor Key (←) → Moves the cursor one character left. ✅

CTRL+C → Stops the execution of a command. ✅

Incorrect Option:

TAB → Does not display the latest command; instead, it auto-completes commands. ❌

✅ Reference: HCIA-Datacom Command Line Guide – CLI Keyboard Shortcuts

Switch (A): A network switch is a fundamental device used to connect devices in a local area network (LAN) and forward packets based on MAC addresses.

Firewall (B): A firewall is used to filter and protect the network from unauthorized access and threats.

Router (D): A router is essential for forwarding packets between different networks and managing routing.

Agile Controller (C): This is a network automation and management tool rather than a fundamental networking device. Since it is not typically deployed as a core network device, option C is the correct answer.