2.7 - Internet Connection Types Flashcards
1
Q
Satellite networking
A
- Communication to a 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 and is working on 20 ms - High frequencies - 2 GHz
– Line of sight, rain fade
2
Q
Fiber
A
- High speed data communication
– Frequencies of light - Higher installation cost than copper
– Equipment is 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 is slowly approaching the premises
– Business and home use
3
Q
Cable broadband
A
- Broadband
– Transmission across multiple frequencies
– Different traffic types - Data on the “cable” network
– DOCSIS (Data Over Cable Service Interface
Specification) - High-speed networking
– 50 Mbits/s through 1,000+ Mbit/s are common - Multiple services
– Data, voice, video
4
Q
DSL
A
- ADSL (Asymmetric Digital Subscriber Line)
– Uses telephone lines - Download speed is faster than the upload speed
(asymmetric)
– 200 Mbit/s downstream / 20 Mbit/s upstream
are common
– ~10,000 foot limitation from the central office (CO)
– Faster speeds may be possible if closer to the CO
5
Q
Cellular networks
A
- Mobile devices
– “Cell” phones - Separate land into “cells”
– Antenna covers a cell with certain frequencies - Tethering
– Turn your phone into a wireless router - Mobile hotspot
– Standalone devices
– Use your phone for other things
6
Q
WISP
A
- Wireless Internet Service Provider
– Terrestrial internet access using wireless - Connect rural or remote locations
– Internet access for everyone - Many different deployment technologies
– Meshed 802.11
– 5G home internet
– Proprietary wireless - Need an outdoor antenna
– Speeds can range from ~ 10 to 1,000 megabits per second
