CompTIA Security+ Certification SY0-601: The Total Course - SSH Public Key Authentication Lab

The video tutorial explains public key authentication on a Linux host, focusing on setting up a Kali Linux virtual machine, starting the SSH service, and testing SSH connections. It covers generating a public and private key pair, copying the public key to the server, and testing public key authentication. The tutorial provides step-by-step instructions for each process, ensuring a comprehensive understanding of SSH and key management.

What is the primary advantage of using public key authentication over traditional password-based login?

• It requires no setup on the server.

• It is faster to type.

• It provides a more secure method of authentication.

• It allows multiple users to share the same login credentials.

What is the first step in setting up SSH on a Kali Linux virtual machine?

• Create a new user account.

• Download additional software packages.

• Start the SSH service using a command.

• Install a new operating system.

Why is the 'sudo' command used when starting the SSH service?

• To ensure the command runs faster.

• To run the command with elevated privileges.

• To save the command for future use.

• To log the command in a special file.

Where are the private and public key files stored by default in Linux?

• In the user's home directory under a hidden .ssh folder.

• In the /usr/local directory.

• In the /etc directory.

• In the /var directory.

What is the purpose of the 'authorized_keys' file on the server?

• To log all SSH login attempts.

• To store public keys that are allowed to authenticate.

• To store the server's private keys.

• To list all users who can access the server.

Which command is used to copy the public key to the server?

• ftp

• ssh-copy-id

• scp

• rsync

What does the SSH client ask for when logging in with public key authentication?

• The passphrase for the private key.

• The server's IP address.

• The user's password.

• The server's hostname.