Bits & Bytes: Week 5, I-III - Dial-Up and Broadband Flashcards
ACRONYM:
POTS
Plain Old Telephone Service
ACRONYM:
PSTN
Public Switched Telephone Network
What does modem stand for?
Modular/Demodulator
What is the term for a measurement of how many bits can be passed across a phoneline in one second?
the Baud Rate
What device takes computer data and translates it into audible wavelengths to be transmitted via POTS?
a Modem
In a broad sense, what is the definition of broadband?
Any connectivity technology that is not dial-up internet
What is the term for a technology that allowed multiple telephone calls to be transmitted over a single link?
T-Carrier Technologies
What are the four most common broadband technologies used today?
T-Carrier Technology, Digital Subscriber Lines, Cable broadband, and fiber connections
ACRONYM:
DSL
Digital Subscriber Lines
ACRONYM:
T1
Transmission System 1
What is a term for any twisted pair copper connection capable of speeds of 1.544 megabits per second?
T1
How many T1 lines are in a T3 line?
28
How fast is a T1 connection?
1.544 megabits per second
How fast is a T3 connection?
44.736 megabits
What type of technology replaced T1 for inter-ISP communications?
Fiber technology
ACRONYM:
DSL
Digital Subscriber Line
Why doesn’t DSL interfere with regular telephone calls?
DSL operates on a different frequency than traditional voice-to-voice phone calls
ACRONYM:
DSLAM
Digital Subscriber Line Access Multiplexers
ACRONYM:
ADSL
Asymmetric Digital Subscriber Line
ACRONYM:
SDSL
Symmetric Digital Subscriber Line
Which type of connection generally downloads at a higher speed than it uploads?
Asymmetric Digital Subscriber Lines
What’s the difference between SDSL and ADSL?
SDSL downloads and uploads data at the same rate whereas ADSL generally downloads data more quickly than it uploads data.
How fast can an SDSL connection move data?
1.544 megabits per second
What caused the boom of cable television in 1984? Why?
The Cable Communications Policy Act deregulated the cable television business.
Why doesn’t a cable broadband connection interfere with cable television being sent over the same line?
Broadband internet connections are sent over a different frequency than cable television
What type of cable does cable television and broadband use?
Coaxial Cables
Which broadband model cannot guarantee a specific amount of bandwidth to its users?
Shared bandwidth technology
From where does an internet connection in a home or business originate when using DSL or dial-up internet?
The telephone company’s Central Office (CO)
ACRONYM:
CMTS
Cable Modem Termination System
What is the term for a device that sits at the edge of a consumer’s network and connects them to the CMTS?
Cable modem
What connects large numbers of different cable connections to an ISPs core network?
The Cable Modem Termination System
How far, generally, can a copper wire carry a signal before it degrades, requiring a repeater?
A few thousand feet
ACRONYMS:
FTTX, FTTN, FTTB, FTTH
Fiber to the X, Neighborhood, Building, Home
ACRONYM:
ONT
Optical Network Terminator
What is the demarcation point for fiber technologies?
the Optical Network Terminator
Where is fiber technology translated into more traditional, twisted copper cable protocols?
at the Optical Network Terminator
