A User Is Accessing an EC2 Instance on the SSH

question 582

Multiple Choice

A user is accessing an EC2 instance on the SSH port for IP 10.20.30.40/32. Which one is a secure way to configure that the instance can be accessed only from this IP?

• A) In the security group, open port 22 for IP 10.20.30.40
• B) In the security group, open port 22 for IP 10.20.30.0
• C) In the security group, open port 22 for IP 10.20.30.40/32
• D) In the security group, open port 22 for IP 10.20.30.40/0

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Definitions:

Bad Debts Expense

An expense account that represents accounts receivable that a company does not expect to collect and writes off as a loss.

Allowance for Doubtful Accounts

A contra-asset account used to estimate the portion of accounts receivable that is expected not to be collected.

Percentage-of-Receivables Basis

A method used in accounting to estimate the amount of accounts receivable that will not be collected by applying a percentage based on historical data.

Bad Debt Expense

A cost reported on the income statement, reflecting credit sales that are not expected to be collected.