1) Everything you hear, including speech, is in ____ form.

2) What was the first switch in a telephone system?

3) The main problem with analog communication is ___ which can be distorted if passed through several amplifiers called ____ noise.

4) Digital networks can clean the signal by utilizing ____ that can decide whether to generate a 1 or a 0.

5) The communication path between several central offices is known as a ____

6) RTP stream are also often referred to as the ___

7) ___ Protocol has been around longer then ___, which is a media-based protocol.