Section 13 OBJ 2.7: Internet Connections Flashcards
Internet Service Provider (ISP)
Establishes high speed links between their network and clients
Plain Old Telephone Service (POTS)
Runs as a dial-up connection and is used on the public switched telephone network (PTSN)
Legacy System
Old system still used in some critical functions
Integrated Services Digital Network (ISDN)
Supports multiple 64 Kbps channels
Older technology designed to carry voice, video, or data over B (bearer) channels
Digital Subscriber Line (DSL)
older inexpensive way to get high speed data to users
Asymmetric DSL (ADSL): Has different speeds of upload (1.544 Mbps) and download (8 Mbps)
Symmetric DSL (SDSL): Equal download and upload speeds
Very High Bit-Rate DSL (VDSL): High download (50 Mbps) and upload (10 Mbps) speeds
Cable Modems
Uses a Cable TV network that is made up on a hybrid fiber-coaxial (HFC) distribution network
can transmit and receive over cable television infrastructure
Data-Over-Cable-Service Interface Specifications (DOCSIS)
specific frequency ranges used for upstream and downstream transmissions
Upstream: 5 MHz to 42 MHz
Downstream: 50 MHz to 860 MHz
FTTX
where is the fiber connected to
Fiber To The Curb (FTTC)
fiber optic cable is run from a internet provider access point to a curb
Fiber To The Premises (FTTP)
Fiber optic that connects directly to a building and connects to a optical network terminal (ONT)
Optical Network Terminal (ONT)
physical devices that convert optical signals to electrical signals
1G
Frequency: 30 KHz
Speed: 2 Kbps
2G
Frequency: 1800 MHz
Speed: 14.4-64 Kbps
SMS and text
International Roaming
Conference Calling
Use of internet
Introduction to Enhanced Data Rates For GSM Evolution (EDGE) bringing speeds up to 1 Mbps
3G
Frequency: 1.6-2 GHz
Speed: 144 Kbps to 2 Mbps
Wideband Code Division Multiple Access (WCDMA): Used by the UMTS standard and could reach data speeds up to 2 Mbps
High Speed Packet Access (HSPA): Reaches speeds of up to 14.4 Mbps and is sometimes referred to as 3.5G
HSPA+: speeds up to 50 Mbps. referred to as 3.75G
4G
Frequency: 2-8 GHz
Speed: 100 Mbps to 1 Gbps
4G Long-term Evolution: 100 Mbps
LTE Advanced: 1 Gbps
5G
LOW-BAND
Frequency: 600-800 MHz
Speed: 30-250 Mbps
MID-BAND
Frequency: 2.5-3.7 GHz
Speed: 100-900 Mbps
HIGH-BAND
Frequency: 25-39 GHz
Speed: Extremely high speed (in Gbps)
Microwave
Uses a beam of radio waves in the microwave frequency range to transmit information between two fixed locations.
Must maintain line of sight
called WiMAX instead of Wi-Fi
Ultra High Frequency (UHF)
Super High Frequency (SHF)
Extremely High Frequency (EHF)
Satellite
a method of using communication satellites located in space to connect a user to the internet
Slow
Expensive
High Latency
