Service Provider Links

Question 1

Benefits of Satellite Communication

Answer 1

Increased latency with deteriorating atmospheric conditions
Allows communications to areas where physical cabling is restrictive

Question 2

Symmetric DSL

Answer 2

Symmetric speeds
T1 speeds = 1.544 Mbps
Maximum distance (from the telco switch) = 10,000 ft symmetric DSL (ADSL) speeds

Question 3

Asymmetric DSL

Answer 3

Upload and Download speeds are not symmetrical
Downloads = 24 Mbps
Uploads = 3.5 Mbps (shorter distance)
Downloads = 1.544 Mbps (max. 18,000 ft)
Uploads = 16 kbps (max. 18,000 ft)

Question 4

VDSL

Answer 4

Very High Speed DSL
52 Mbps DL
16 Mbps UL

Question 5

What does the word “Modem” mean?

Answer 5

Short for “Modulation/Demodulation”

Question 6

CMTS

Answer 6

Cable Modem Termination System
- joins the DSL network to the Provider Network

Question 7

DOCSIS

Answer 7

Data over Cable Service Interface Specification
- International telecommunications standard

Question 8

DOCSIS v3.1

Answer 8

10 Gbps DL
1-2 Gbps UL

Question 9

DOCSIS v4.0

Answer 9

10 Gbps DL
6 Gbps UL

Question 10

Metro-Optical Network

Answer 10

Reduced Cost compared to SONET
Used existing LAN grid, usually comprised of ethernet

Question 11

SONET

Answer 11

Synchronous Optical Networking
Fiber Optic Network
Dual-ring topology, fault Tolerant

Question 12

SONET OC-1

Answer 12

51.84 Mbps

Question 13

SONET OC-3

Answer 13

OC-3 = 155.52 Mbps

Question 14

SONET OC-192

Answer 14

OC-192 = 9510.912 (10G)

Question 15

SONET OC-768

Answer 15

39,813.12 Mbps (40G)