27. | The invention of the transistor, or semiconductor, was one of the most important developments leading to the personal computer revolution. What company invented the transistor in 1947? | |||||||
Answer: Option D Explanation: The transistor, which essentially is a solid-state electronic switch, replaced the much less suitable vacuum tube. Because the transistor consumed significantly less power, a computer system built with transistors was much smaller, faster and more efficient than a computer system built with vacuum tubes. |
28. | What is TTL? | |||||||
Answer: Option C Explanation: Time To Live specifies how many more hops a packet can travel before being dropped. |
30. | What does PPTP stand for? | |||||||
Answer: Option C Explanation: It is a protocol used to create VPN connections over the net. |