Question 1

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

Accepted Answer

traditional

Question 2

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

Accepted Answer

Traditional cable TV networks were originally designed to carry analog signals, though many have been upgraded to support digital signals.

Question 3

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

Accepted Answer

Older analog systems, such as traditional broadcast television and radio, were primarily one-way transmission systems, but they were downstream, delivering content from the broadcaster to the viewer or listener, not upstream.

Question 4

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

Accepted Answer

Replacing coaxial trunking cable with fiber cable in a new cable TV network allows for channelized pipes that can segment services (like voice, video, and data), eliminates the need for line amplifiers due to fiber's lower signal degradation over distance, enables two-way transmission for interactive services, and provides additional bandwidth to accommodate more channels and higher quality signals.

Question 5

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

Accepted Answer

The answer of The new fiber-optic digital CATV networks are...

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:

Accepted Answer

The subscriber drop, which is the portion of the network that connects the local network to the individual subscriber's premises, was the only part not upgraded in the scenario described. This is because the main focus of such upgrades is often on the backbone and distribution components of the network to increase overall capacity and speed, while the last mile (subscriber drop) might not be immediately upgraded to fiber-optic technology due to cost, logistical challenges, or other priorities.

Question 7

Multiplexers vary in size depending on the number of ________.

Accepted Answer

The answer of Multiplexers vary in size depending on the...

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.

Accepted Answer

The main difference is actually the opposite; the CATV network is logically a bus topology, where signals are distributed along a common backbone to all users, and the telephone network is logically a star topology, where each user has a dedicated line to the central office.

Question 9

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

Accepted Answer

When two neighbors watch the same channel on television, they are indeed watching exactly the same signal broadcast from the TV station, assuming they are receiving the signal via the same method (e.g., over-the-air broadcast, cable, satellite).

Question 10

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

Accepted Answer

The answer of A shared ________ topology is commonly used...

Question 11

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

Accepted Answer

In a star topology, each subscriber has a dedicated line to the central office, so they cannot share telephone lines.

Question 12

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

Accepted Answer

The answer of The new high-speed data technologies being offered...

Question 13

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

Accepted Answer

The answer of A cable modem allows for transmission speeds...

Question 14

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

Accepted Answer

All the statements about RoadRunner data service are true. The speed can vary due to the bus topology of the cable TV network, speeds can reach their maximum when fewer users are online, and a significant difference in the network is how signals are multiplexed and how data traffic is managed at different network points.

Question 15

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

Accepted Answer

Cable modems use a shared network architecture, but this is not considered their greatest advantage. Their main advantage is providing high-speed internet access through the existing cable television infrastructure, allowing for faster data transmission than many other forms of residential internet access.

Question 16

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

Accepted Answer

The answer of Users of cable modems should be concerned...

Question 17

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

Accepted Answer

The 1996 Telecommunications Act allowed for more competition by letting companies provide services previously not allowed, including enabling the cable television industry 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.

Accepted Answer

Twisted pair wiring is used for both telephone and cable TV services, so a subscriber can switch between providers without having to rewire their home.

Question 19

The lifeline POTS dilemma can be alleviated by:

Accepted Answer

Both options A and B are viable solutions to alleviate the POTS (Plain Old Telephone Service) dilemma, which involves issues with maintaining traditional telephone service in the face of newer technologies. Option A involves using a dedicated twisted pair cable for better connectivity, while option B involves powering the terminating box via the coaxial cable, both of which can independently address the issue.

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.

Accepted Answer

Both systems aim to extend the customer service area (CSA) of the local plant, but the CATV system requires additional complexity in design and maintenance due to the need to segregate video and voice signals, making it trickier compared to the more straightforward digital loop carriers used by telephone companies.

Quiz 22: Catv Networking Topology