S12 - Internet Connections Flashcards
function of Internet Service Provider (ISP)
Establishes high speed links between their network and clients
Function of ONT (Optical network terminal)
Converts optical signal from fibre connection that can be routed onto a router using copper wire cables
Define Plan Old Telephone Service (POTS)
Runs as a dial up connection and is used on the public switched telephone network (PSTN)
Define legacy system
old system that is still used in some critical functions
Define integrated services digital network (ISDN)
old Standard for connecting digital data and services with telephone lines
3 types of DSL
ADSL, SDSL, VDSL
Define Asymmetric DSL (ADSL)
has different speeds of download and upload
Define Symmetric DSL (SDSL)
Has equal speeds of download and upload
Define Very High Bit-Rate DSL (VDSL)
High speeds of download and upload. Download 50Mbps or more Upload 10Mbps or more
Define Cable Modems
Uses a cable TV network that is made up a hybrid fiber-coaxial (HFC) distribution network
Define Data-Over-Cable service interface specifications (DOCSIS)
Protocol used by modems which can allow the modem to understand how the network is running in terms of layout, can specifical channel size and frequencies for Digital Cable tv
Define Fibre to the curb (FTTC)
Runs a fibre optic cable from an internet provider access point to a telephone cabinet in your area. Copper wires are then used to connect to your home
Define Fiber to the premises (FTTP)
Fiber optic that connects directly to a building and connects to an optical network terminal (ONT)
Function of ONT
Physical devices that convert optical signals to electronic signals that the modem can understand
The G in cellular version refers
to the generation of cellular technology
Define Wideband code division multiple access (WCDMA)
Used by the UMTS standard, refers to 3g
Define high speed packet access (HSPA)
Reaches speeds of up to 14.4 Mbps and is sometimes referred to as 3.5G
Define High Speed Access Evolution (HSPA+)
Reaches speed of up to 50Mbps and is sometimes referred to as 3.75G
Speed of4G Long-Term evolution (4G LTE)
100Mbps
Improved Version of 4G LTE
LTE Advanced (LTE-A)
Which bands does 5G come in
Low-Band, Mid-Band,High-Band
Which bands does 5G come in
Low-Band, Mid-Band,High-Band
In terms of range and speed explain 5G bands
the higher the band, the lower the range but higher the speed, Low-Band, highest range but lowest speed of the 3
In terms of antennas and microwaves what is necessary for communication
Both antennas must maintain a line of sight
Function of satellite
A method of using communication satellites located in space to connect a user to the internet
Drawbacks of sattelite
Slow, Expensive, High latency
Most common WAN tech you will find
cable modem,fibre optic modem
