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

The telnetlib module in Python provides functions to interact with Telnet servers, allowing Python scripts to automate Telnet sessions. This module is widely used in network automation and scripting tasks, where Telnet is used to access and manage network devices remotely​.

Router A would have three TCP connections in this scenario:

One for the Telnet session from host A to router A.

One for the FTP control connection to router B.

One for the FTP data connection to transfer the configuration file. These TCP connections facilitate the remote login and file transfer across the network​.

Detailed Explanation:UDP (User Datagram Protocol) is a connectionless protocol that does not provide reliability, packet sequencing, or traffic control. These features are usually managed by TCP, which is used for applications requiring reliable data transmission. UDP’s design makes it suitable for real-time applications, such as video streaming or VoIP, where speed and low latency are prioritized over reliability. (Reference: HCIA-Datacom Training Material, UDP Characteristics)

In VRP, the "-a" parameter in the ping command allows specifying a source IP address for the echo request. This can be helpful in testing connectivity from a specific interface on the device, which is useful in verifying path accessibility or troubleshooting issues with certain network segments​.