1D0-470 CIW Security Professional
Note 2: 1D0-470 Answers are not shown in demo questions.
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Demo Question 10.
You installed SSH on an older Linux server. You want to allow users to authenticate securely. Which choice lists two actions that must occur first?
A. Public keys must first be exchanged to enable data encryption, and then the system exchange host keys to enable authentication without passwords.
B. The system must exchange host keys to enable data encryption, and individual users must exchange public keys to enable authentication without passwords.
C. A key pair must be obtained from a CA to enable data encryption, then host keys must be exchanged to enable authentication.
D. A key pair must be obtained from a CA to enable authentication, then host keys must be exchanged to enable data encryption.
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Answer: A
Explanation: SSH uses a public key scheme. First public keys are exchanged to
enable data encryption, then host keys are exchanged to enable authentication.
SSH uses two different kinds of key pairs: host keys and user keys. The user keys are
public.
Note 1: An SSH (Secure Shell Protocol) session is very similar to a Telnet session.
Where a SSH session differs from telnet is that your password is encrypted and not sent
in the clear. OpenSSH is a FREE version of the SSH protocol suite.
Note host keys:
Part of the SSH installation process is the generation of a host key (pair). The host key
generated at setup time can be used by that host indefinitely, barring root compromise.
And Because the host key identifies the host, not individual users, each host needs only
one host key. Note that host keys are used by all computers that run SSH regardless of
whether they run only the SSH client (ssh), SSH dæmon (sshd), or both.
SSH can negotiate keys and set up encrypted sessions completely transparent to users
using host keys.
Incorrect
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