2.7 Internet Connections

Question 1

What is the role of an ISP?

Answer 1

To establish high speed links between their network and clients

Question 2

Define a legacy system

Answer 2

An old system that is still used in some critical functions

Question 3

How does plain old telephone service (POTS) work?

Answer 3

Dial-up connection on public switched telephone network; analog connections can be voiced or data converted from binary

Question 4

What is the maximum bandwidth of a dial-up modem?

Answer 4

53.3 kb/s

Question 5

What is integrated services digital network (ISDN)?

Answer 5

An older technology designed to carry voice, video or data of B (bearer) channels; supports multiple 64 Kbps channels

Question 6

What is asymmetric DSL?
Give the maximum speeds.

Answer 6

Different download/upload speeds (max 8Mbps download and 1.544Mbps upload)

Question 7

What is very high bit-rate DSL (VDSL)?

Answer 7

High speeds of both download and upload (50Mbps+ download and 10Mbps+ upload)

Question 8

What are the ADSL and VDSL max. distances to DSLAM?

Answer 8

ADSL - 18000ft
VDSL - 4000ft

Question 9

What network does a cable modem use?

Answer 9

Cable TV, made up of of a hybrid fiber-coaxial distribution network

Question 10

What are data-over-cable service interface specifications (DOCSIS)?

Answer 10

Specific frequency ranges used for upstream and downstream transmissions

Question 11

List the three fiber connection types

Answer 11

Fiber to the curb, fiber to the premises and optical network terminal

Question 12

What is an optical network terminal?

Answer 12

A physical device that converts optical signals into electrical signals

Question 13

List five things cellular connections are used for?

Answer 13

SMS and text messaging, international roaming, conference calling, internet use and introduction to EDGE

Question 14

What speeds can high speed packet access (HSPA) reach, and what is it sometimes referred to as?

Answer 14

14.4 Mbps, referred to as 3.5 G

Question 15

What speeds can high speed packet access evolution (HSPA+) reach, and what is it sometimes referred to as?

Answer 15

50Mbps, referred to as 3.75G

Question 16

Speed of 4G long-term evolution (LTE)?

Answer 16

100Mbps

Question 17

Speed of LTE Advanced (LTE-A)

Answer 17

1 Gbps

Question 18

What generation of cellular had a frequency of 1800 MHz and a speed of 14.4 to 64Kbps?

Answer 18

2G

Question 19

Name the three types of microwave connections

Answer 19

Ultra, super, and extremely high frequency

Question 20

Do antennas have to maintain a line of site for microwave waves to transmit?

Answer 20

Yes

Question 21

Give the frequency and speed of 4G cellular

Answer 21

2-8 GHz, 100Mbps to 1Gbps

Question 22

Which version of 5G operates at 2.5-3.7 GHz and 100-900 Mbps?

Answer 22

5G Mid-band

Question 23

Give the frequency and speed of 1G cellular

Answer 23

30KHz, 2 Kbps

Question 24

Which generation of cellular operates at 1.6-2 GHz and 144 Kbps to 2Mbps?

Answer 24

3G

Question 25

Give the frequency and speed of 5G high-band cellular

Answer 25

25-39GHz, extremely high speed in Gbps

Question 26

Which generation of cellular operates at 600-850 MHz and 30-250 Mbps?

Answer 26

5G low-band

Question 27

Give the DOCSIS for upstream and downstream transmissions.

Answer 27

Upstream: 5MHz to 42MHz
Downstream: 50MHz to 860MHz