What is a feature of a dial-up connection? a) the use of different frequencies to carry voice and data signals on the copper telephone wire. b) the use of an analog modem to transmit data over voice telephone lines. c) the use of different frequencies to send multiple signals over the same medium. d) the use of multiple channels which can carry different types of services.

The correct answer is B. The use of an analog modem to transmit data over voice telephone lines.

Explanation:

Dial-up is the oldest Internet connection method and was the only one used when the Internet took its first steps. Access is made by the user through an analog modem and a conventional telephone line. It is less and less used, since the data transmission capacity does not exceed 56 kbps, which makes navigation very slow, unstable and keeps the telephone line busy when connected to the internet. With the popularization of broadband access services and their very affordable prices, dial-up access is virtually obsolete.

Through the process of sedimentation,sediment is turned back to rock to form sedimentation.the process of sedimentation is: > deposition-where fragments were deposited into the river or sea under gravity or travelling agent such as wind or water. > sedimentation-the fragments deposited in the river sedimented and accumulate> compaction-the layers of fragments deposited undergoes compaction due to the weight if the upper layers> cementation-chemical substance of the fragments such as cement dissolved into the water and cement the other fragments together to form sedimentary rock.thus,cementation and compaction are the process.on the other hand, transformation only occur when a rock under goes metamorphism(compaction or extreme heat).while recrystillization occurs when a rock is melted and cooled down,which also requires metamorphism to take place.hope it !