Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
What are Telecommunications signals ? |
Telecommunications signals are analog or digital electronic transmissions for the purpose of communication. |
|
|
The signals used to send information over voice and data networks can vary in ________ & ____________ |
Speed ; Strength |
|
|
This signal fluctuates continuously, creating a curved waveform. |
What is a analog signal? |
|
|
what signal are sound waves |
They are analog signals |
|
|
Why were tvs and radios designed around analog systems? |
Because analog systems carry voice |
|
|
Today even signals like voice that traditionally were analog are increasingly sent using __________ _____________ |
digital technology |
|
|
What is it when The speed at which an electronic communications signal can change from high to low? |
It is called the signal frequency |
|
|
A faster frequency means a faster _______ ______________rate. |
data transmission |
|
|
How is signal frequency measured? |
hertz (hz) and cycles per second (cps) |
|
|
In computer networks, the data transmission rate is also referred to as the _________ and is measured in ________________ |
bandwith; beats per second |
|
|
What two bandwith categories are there? |
Narrowband and broadband |
|
|
What do ISP say to advertise their broadband abilites |
They say it's “high-speed.” |
|
|
In home use, the terms broadband and high-speed Internet refer to a connection that is always _____ or _________, such as cable or ______. |
on ; active ; dsl |
|
|
DSL claims maximum download speed of - |
6mbps |
|
|
cable claim maximum download speeds of |
50 Mbps |
|
|
__________ is considered any medium with a speed less than 200 Kbps |
narrowband |
