Deck 22: Catv Networking Topology

Question 1

Head-end office, trunking cable, feeder cable, and user drops are all categories comprising the ________ cable network.

Answer 1

traditional

Question 2

The traditional cable TV network is built to carry digital signals.

Answer 2

False

Question 3

Older analog systems were one-way transmission systems-upstream only.

Answer 3

False

Question 4

Replacing coaxial trunking cable with fiber cable in the new cable TV network allowed for:

A) channelized pipe that could be used to segment services such as voice, video, and data
B) elimination of line amplifiers
C) two-way transmission
D) additional bandwidth
E) all of the above

Question 5

The new fiber-optic digital CATV networks are called hybrid fiber ________ networks.

Question 6

In replacing the old analog equipment with new high-speed digital equipment and transforming the outside plant into a high-speed, digital fiber-optic network, the only portion of the network that was not touched was the:

A) subscriber drop
B) feeder cable
C) head-end office
D) trunking cable

Question 7

Multiplexers vary in size depending on the number of ________.

Question 8

The main difference between the CATV network and the telephone network is their fundamental underlying physical network architecture; the telephone network is logically a bus and the CATV network is logically a star.

Question 9

When two neighbors watch the same channel on television, they are watching exactly the same signal.

Question 10

A shared ________ topology is commonly used for Ethernet LANs and CATV service.

Question 11

Because the telephone company uses a star topology, subscribers cannot share telephone lines.

Question 12

The new high-speed data technologies being offered to consumers are called ________ data services.

Question 13

A cable modem allows for transmission speeds as high as 6 Mbps downstream and ________ upstream.

Question 14

Which of the following statements is true concerning RoadRunner data service?

A) the speed offered to customers varies due to the bus topology of the cable TV network
B) when few users are on line, the customer may reach maximum speeds on the pipe
C) the greatest difference in the network is how the signals are multiplexed into one pipe at the curb and how the data traffic is handed off to the ISP at the head-end office
D) all of the above

Question 15

The greatest advantage that cable modems have is that of a shared bus topology.

Question 16

Users of cable modems should be concerned today about other users being able to access their files.

Question 17

The 1996 Telecom Act granted the cable television industry the right to offer voice services in the local network.

Question 18

The benefit of terminating a telephone with twisted pair is that the subscriber can change from the local incumbent to the cable TV provider without making any inside wire changes.

Question 19

The lifeline POTS dilemma can be alleviated by:

A) using a separate pair of twisted cable from the terminating box at the curb to the customer's termination box on the side of the building
B) placing power in the coax bus and using this power to feed the terminating box on the house
C) either a or b
D) both a and b simultaneously

Question 20

Both the hybrid coax fiber box and the telephone companies' digital loop carriers deployed to extend the CSA of the local plant technically perform the same purpose except that the CATV box is trickier to design and maintain because it has to segregate the video stream from the voice signal.

Question 21

Which of the following is a factor influencing a CATV network?

A) tariff costs
B) interconnection agreements between the CATV provider and the ILEC
C) the philosophy of the CATV engineer
D) all of the above

Question 22

Once a CATV access network is converted to digital, the provider can offer all of the following except:

A) voice
B) virtual olfactory enhancement
C) video
D) broadband data

Question 23

Superb customer service and customer relations by cable companies is one of their greatest assets today.

Question 24

Which of the following could interfere with use of DBS by some consumers?

A) undetermined obstructions
B) trees
C) buildings
D) any of the above

Question 25

Which of the following is not a DBS company?

A) EchoStar
B) RoadRunner
C) DIRECTV
D) none of the above (they are all DBS companies)

Question 26

The main difference between the telephone network and CATV voice network is the use of FTTC hybrid fiber coax systems to multiplex the voice signal onto the fiber.

Question 27

Explain the deployment of a typical cable modem.