2.4 Compare and contrast common Internet service types
📘CompTIA ITF+ (FC0-U61)
Cable Internet
Cable Internet is a type of high-speed Internet service that is delivered using the same coaxial cables that carry cable television. It is one of the most common ways homes and offices connect to the Internet.
How It Works
- Infrastructure:
- Uses coaxial cables, which are the same cables used for cable TV.
- A modem is installed at the customer’s location. This modem connects to the coaxial cable and converts the signal into data that your computer or network can use.
- Connection Method:
- Data travels from your computer to the modem and then over the coaxial cable to the Internet Service Provider (ISP).
- The ISP sends the data to the wider Internet.
- Shared Bandwidth:
- Cable Internet often shares bandwidth with other users in the same neighborhood.
- During peak hours, speeds can slow down because many people are using the same cable line.
Speed
- Cable Internet is generally faster than DSL, but usually slower than fiber.
- Typical speeds range from 25 Mbps to 1 Gbps depending on the ISP and plan.
Advantages
- High-speed connectivity suitable for streaming, video conferencing, and downloading large files.
- Widely available in urban and suburban areas.
- Easy to integrate into existing IT networks using a cable modem or router.
Disadvantages
- Shared bandwidth can cause slower speeds during peak usage times.
- Limited availability in some rural or remote areas.
- Less symmetrical: Download speeds are usually higher than upload speeds, which can impact uploading large files or hosting servers.
IT Environment Example
- In a small office: Cable Internet can provide fast enough speed for multiple employees to browse the web, access cloud apps, and video conference.
- For remote work: Employees can connect via VPN over cable Internet, allowing secure access to office networks.
- For IT support: Technicians may use cable Internet to download software updates or patches to multiple machines efficiently.
Key Exam Points to Remember
- Uses coaxial cables (like cable TV).
- Speeds are generally high but shared—can be slower during peak times.
- Download speeds > upload speeds (asymmetrical).
- Widely available in cities/suburbs but limited in rural areas.
- Common in homes and small office IT networks.
