The AT&T Long-Distance Network Did Not Collapse Entirely on January

question 10

Multiple Choice

The AT&T long-distance network did not collapse entirely on January 15, 1990, because

• A) the U.S. Secret Service arrested the culprits before they could do any further damage.
• B) AT&T technicians rapidly fixed the software bug in the routing switches.
• C) MCI loaned some equipment to AT&T.
• D) the faulty computers shut themselves off before they could do any further damage.
• E) not all the routing switches had been converted to the latest software.

---

Definitions:

Return On Investment

A measure used to evaluate the efficiency or profitability of an investment, calculated by dividing the profit gained from an investment by the cost of the investment.

Operating Income

The profit earned from a firm's core business operations, excluding deductions of interest and taxes.

Investment Turnover

A measure of a company's efficiency in using its investments to generate sales, calculated as sales divided by the average value of investments.

Profit Margin

The percentage of revenue that remains as profit after all expenses have been subtracted from sales.