CCNA to CCNP Transition: Working with Passwords and Telnet

About this course

*** 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 s