A device which connects one computer to another is known as

Options

A. Photostat machine
B. Laser lazer
C. Modem
D. FAX

Answer

To solve the question "A device which connects one computer to another is known as", we can follow these steps:

### Step 1: Understand the Question
The question is asking for a specific type of device that facilitates the connection between two computers.

### Step 2: Analyze the Options
The options provided are:
- Photostate machine
- Laser
- Modem
- Fax

### Step 3: Define Each Option
- **Photostate machine**: This is a device used for copying documents, not for connecting computers.
- **Laser**: This typically refers to a technology used for printing or cutting, not for connecting computers.
- **Modem**: This is a hardware device that modulates and demodulates signals, allowing digital data to be transmitted over analog communication lines. It connects computers to the internet or to each other.
- **Fax**: This is a device used to send documents over a telephone line, not specifically for connecting computers.

### Step 4: Identify the Correct Answer
Among the options, the modem is the only device specifically designed to connect computers, either to each other or to the internet.

### Conclusion
Thus, the correct answer to the question is **Modem**.

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