Overview
This lecture clarifies the differences between Wi-Fi, Internet, and networking devices, explaining how each device contributes to home and office connectivity.
Internet Service Provider (ISP)
- ISPs (Internet Service Providers), not "Wi-Fi providers", deliver internet to homes and offices.
- Common ISPs include IndiHome, FirstMedia, FastNet, MyRepublic, Indosat GIG, BizNet, and Bali Fiber.
- ISPs use various connection types: fiber optic (most common), coaxial cable, telephone cable, wireless (radio/cellular), or satellite.
Modem
- A modem (modulator-demodulator) translates data from the ISP to a usable format for your network.
- Different modem types match different connection cables: dial-up, DSL, coaxial, fiber optic, or radio.
- Modems used to connect directly to one device, but now typically link to a router to serve many devices.
Router
- A router connects the modem to your local network and manages internet traffic between devices.
- The router assigns IP addresses and acts as the gateway between local devices and the internet.
Local Area Network (LAN) Devices
- Switches and hubs connect multiple wired devices within a local network; switches are more efficient than hubs.
- The number of switch ports determines how many devices can be connected via cable.
- Access Points create wireless (Wi-Fi) connections, replacing cables for device connectivity.
- A network can exist with only switches/hubs/access points (without internet) for local data sharing.
Wi-Fi and Access Points
- Wi-Fi enables wireless communication within the local network but does not provide internet by itself.
- Access Points are dedicated devices for providing Wi-Fi connectivity.
All-in-One Devices
- ISPs usually provide a single device combining modem, router, switch, and access point functions.
- This all-in-one device is convenient but may not offer the fastest speeds or best performance.
Upgrading Networking Equipment
- Users often add advanced routers or access points for better Wi-Fi speed or coverage.
- Upgrading Wi-Fi equipment improves local connection but does not increase ISP-provided internet speed.
Special Cases
- Some devices combine multiple modems (e.g., cable and 4G/LTE via SIM card) for redundant internet sources.
Key Terms & Definitions
- ISP (Internet Service Provider) — Company that delivers internet service to your location.
- Modem — Device that converts data signals between your ISP and your home network.
- Router — Manages internet connections and directs network traffic; assigns IP addresses.
- Switch — Connects multiple wired devices within a network efficiently.
- Hub — Similar to a switch but less efficient at managing data traffic.
- Access Point — Device providing wireless (Wi-Fi) connectivity within a network.
- Wi-Fi — Wireless networking standard for connecting devices without cables.
- LAN (Local Area Network) — Private network for devices within a limited area like a home or office.
Action Items / Next Steps
- Remember: Wi-Fi enables device connections; the internet is provided by the ISP via modem and router.
- Distinguish between network devices and their functions when setting up or troubleshooting your connection.