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所在平台: Udemy |
课程主页: https://www.udemy.com/course/ccna-to-ccnp-transition-working-with-passwords-and-telnet/
课程评论：没有评论
Coursera 课程《CCNA 到 CCNP 迁移：使用密码和 Telnet》课程总结 本课程是“思科 CCNA 到 CCNP 迁移完整课程”的一部分，旨在帮助学生巩固和深入理解在 CCNA 阶段可能遇到的令人困惑的网络主题和命令。讲师注意到许多学生在从 CCNA 过渡到 CCNP 时，对某些概念或命令存在理解偏差，因此课程聚焦于澄清这些关键点。 课程内容主要分为三个部分： 1. **密码管理：** * 深入探讨密码的本质和重要性。 * 理解 `no service-encryption` 命令的含义及其对密码加密的影响。 * 学习如何破解（或理解）Type 7 加密（`service password-encryption` 命令产生的加密）。 * 解释配置 `enable` 密码的两种方式及其区别（为何需要不同密码）。 * 演示如何将问号 (?) 等特殊字符用作密码的一部分。 * 探讨 `no service password-encryption` 命令是仅禁用当前还是未来密码的加密，或是两者兼而有之。 2. **Telnet 应用：** * 讲解 Telnet 作为源端和目标端的多种配置和使用方式。 * 学习如何在不中断连接的情况下返回到原始主机。 * 展示如何在目标端查看传入连接，以及在源端查看传出连接。 * 提供多种清除源端或目标端 Telnet 连接的方法。 * 演示如何 Telnet 到特定的端口，例如检查远程主机上的 BGP 或 HTTP 服务是否正常运行。 3. **基于 IP 协议特性的网络攻击：** * 解释利用 IP 协议特性发起的各种网络攻击。 * 重点讲解并实际演示 IP Smurf 攻击（IP 欺骗攻击），该攻击利用了 IP 直接广播（IP directed broadcast）功能。 * 提供实际的演示以说明如何防御和缓解此类攻击。 本课程通过解决实际操作中的疑问和提供深入的解释，帮助学习者更扎实地掌握网络基础知识，为进一步学习 CCNP 课程奠定坚实基础。
*** Part of the Complete Course: Cisco CCNA to CCNP Transition ***Whenever I taught CCNP in the class-room, I found that Students were confused about some topics or commands that they have studied in the CCNA course (with someone else!), and I had to clarify or re-explain these topics or commands to them. This is because these topics or commands are confusing by their nature, or because the way that they are typically explained to the students. Therefore, the idea of this course came in my mind, which intend to clarify those confusing topics or commands.This course contains two sections:Working with Passwords: which contains thoughts on passwords, understand the meaning of the no service-encryption command, and how to break the type 7 encryption.Working with Telnet: which contains how to work with telnet as source or destination, and how to telnet to a specific port.Network Attacks Using Features of the IP Protocol: where different network attacks that uses features of the IP protocol are explained, including the IP Smufing attack.For example, when working with passwords: why do we have two ways to configure the enable password? and why both passwords used in these two ways must be different? Also how can we use the question mark as part of the password? Did you ever try to configure a password like that one?Another thing is does the no service password-encryption command disable encryption for current or future passwords? or may be both? And how can we break the type 7 encryption, so the encryption configured by the service password-encryption command? And for Telnet, we will see multiple ways of working with telnet as both the source and the destination, so how to return back to the original host without disconnecting the connection, how to show incoming connections on the destination and the outgoing connections on the source , and also the multiple ways of clearing these connections on either the source or the destination. Finally, we will see how to telnet to a specific port, so to check if BGP or HTTP are working on the remote host for example.As for the network attacks, the IP Smufing attack was explained and demonstrated practically, which takes advantage of the IP directed broadcast feature, and the ways of mitigating this attack were also explained in practical manner.
