Internet Connection Types

Question 1

Cable Modem

Answer 1

• DOCSIS (Data Over Cable Service
Interface Specification)
• 4 Mbits/s through 250 Mbits/s
• Data, Voice

Question 2

DSL

Answer 2

• ADSL (Asymmetric Digital Subscriber Line)
• 24 Mbit/s downstream / 3.3 Mbit/s upstream
• VDSL (Very-high-bit-rate DSL)
• 3 Mbit/s through 100 Mbit/s

Question 3

Fiber

Answer 3

• Fiber optics to the home
• Converged services - Voice, Video, Data
• Enhanced features

Question 4

Satellite networking

Answer 4

• Non-terrestrial communication
• 15 Mbit/s down, 2 Mbit/s up
• High latency
• High frequencies - 2 GHz

Question 5

ISDN - Integrated Services Digital Network

Answer 5

• BRI – Basic Rate Interface (2B+D)
• Two 64 kbit/s bearer (B) channels
• One 16 kbit/s signaling (D) channel
• PRI – Primary Rate Interface
• T1 – 23B + D, E1 – 30B + D + alarm channel

Question 6

Cellular networks

Answer 6

• Mobile devices - “Cell” phones
• Tethering - Turn your phone into a wireless router
• Mobile hotspot - Standalone networking devices

Question 7

Line-of-sight services

Answer 7

• Visual path between antennas - high frequencies
• Common in metropolitan areas
• WiMAX networking - Worldwide Interoperability
for Microwave Access