A Company Is Hosting Backend Web Services Across Amazon EC2

question 18

Multiple Choice

A company is hosting backend web services across Amazon EC2 Linux instances in public subnets in a VPC. A SysOps administrator tries to connect to the instance by using SSH but is unable to connect. What could be the cause of the failed connection?

• A) The security group does not allow inbound traffic on port 22.
• B) The network ACL does not allow outbound traffic on port 80.
• C) The security group does not allow outbound traffic on port 3389.
• D) The network ACL does not allow inbound traffic on port 443.

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Definitions:

DCM Voltage

Direct Current Motor Voltage; refers to the electrical potential required to power a direct current motor.

Electronic Circuitry

The interconnected arrangement of electronic components, such as resistors, capacitors, and transistors, that perform a specific function.

Control Voltage

The electrical potential used to power and operate the control circuits of larger electrical systems, typically lower than power circuit voltages.

Digital Input

An input signal to a digital circuit that represents binary levels (0 or 1), used to control or provide data.