2.7 - Internet Connection Types

Question 1

Satellite networking

Answer 1

Communication to satellite
-non terrestrial communication

High cost relative to terrestrial networking
-50 mbit/s down, 3 mbit/s up are common
-remote sites, difficult to network sites

High latency
-250 ms up, 250 ms down
-starlink advertises 40 ms + is working on 20 ms

High frequencies - 2 GHz
-line of sight, rain fade

Question 2

Fiber

Answer 2

High speed data communication
-frequencies of light

Higher installation cost than copper
-equipment more costly
-more difficult to repair
-communicate over long distances

Large installation in the WAN core
-supports very high data rates
-SONET, wavelength division multiplexing

Fiber = slowly approaching the premises
-business + home use

Question 3

Cable broadband

Answer 3

Broadband
-transmission across multiple frequencies
-diff traffic types

Data on the cable network
-DOCSIS (data over cable service interface specification)

High speed networking
-50 mbit/s thorugh 1,000+ mbit/s are common

Multiple services
-data
-voice
-video

Question 4

DSL

Answer 4

ADSL (asymmetric digital subscriber line)
-uses telephone lines

Download speed = faster than upload speed
-200 mbit/s downstream and 20 mbit/s upstream = common
- ~10,000 foot limitation from CO (central office)
-faster speeds may be possible if closer to CO

Question 5

Cellular networks

Answer 5

Mobile devices

Separate land into cells
-antenna coverages a cell with certain frequencies

Tethering
-turn your phone into wireless router

Mobile hotspot
-standalone devices
-use your phone for other things

Question 6

WISP

Answer 6

Wireless internet service provider
-terrestrial internet access using wireless

Connect rural/remote locations
-internet access for everyone

Many different deployment technologies
-meshed 802.11
-5G home internet
-proprietary wireless

Need outdoor antenna
-speeds may range ~10-1,000 megabits/second