2.7 Internet Connection: Connection Types

Question 1

Internet connection catogory

Answer 1

Different ways to connect your home and business to the internet

Question 2

Cable modem (provided by cable company)

Answer 2

Aka Broadband communication

• transmission across multiple frequencies on same wire
• different data types transmitted on same wire as well

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

Considered High speed networking

• 4 Mbit/s through 250 Mbit/s are common
• gigabit speed possible

Question 3

ADSL modem (phone company)

Answer 3

ADSL (Asymmetrical Digital Subscriber Line)
- uses existing phone lines

• download speed faster then upload speed
• speed up closer you are to central office
• 10,000 ft limitation

Question 4

Dialup

Answer 4

Network with voice telephone lines
- analog with limited frequency response

56 kbit/s modems
Compression up to 320 knit, slower then other modems

Legacy system

Question 5

Fiber

Answer 5

Fiber optics to the home
- high speed networking

Sends many services over one fiber (converged)

Enhanced features

• hundreds of HD channels
• Gbit/seec internet access
• 1 terabyte of cloud storage
• 2 terabytes DVR

Question 6

Satellite networking

Answer 6

Communication to a satellite
- non-terrestrial communication

High cost relative to terrestrial (earth) networking

• 50 m/bits down, 3 Mbit/s up common
• able to connect to remote sites or sites that are difficult to network

High latency
- delay in when signal sent and reaches satellite because of far distance it needs to travel

High frequency

• 2 ghz
• so if its rains signal can get blocked

Question 7

ISDN

Answer 7

Integrated Service Digital Network

(Think company phone that you can transfer to many departments)

Old - faster then dial up but slower then cable

2 types

• BRI - basic rate interface (2B+D)
• • two 64 kbit/s bearer (B) channel (send data)
• • one 16 kbit/s signaling (D) channel (manages connections: sets up and tears down)

PRI: Primary rate interface
- delivered over T1 or E1
-- T1: 23B + D
-- E1: 30B + D + alarm channel
Commonly used as connectivity from PSTN (public phone system) to large phone system (PBX) (enterprise system)

Question 8

Cellular Network

Answer 8

Mobile devices

Land separated into cells

Tethering

• turn phone into a wireless router
• connect to computer through wire and can provide PC with internet

Mobile hotspot
- phone becomes hotspot when connect many devices to phone using 802.11 network

Question 9

Line of sight services

Answer 9

Wireless internet service that’s able to provide access over wide geographical area.

Line of site

• visual path between antennas
• high frequencies

Common in metropolitan areas

• antenna placed very high
• covers many homes at the same time

Common option

• WiMax networking
• world wide interoperability for microwave Access
• wireless high speed internet access

Non- line of sight option
- lower frequencies