Perangkat Jaringan Komputer dan Media Transmisi | Network Fundamental Learning Series #3

Summary

This video provides an in-depth overview of key hardware components and transmission media used in computer networks. It covers devices like hubs, switches, routers, access points, repeaters, modems, and NICs, explaining their functions and differences. The video also dives into cable types such as coaxial, twisted pair, and fiber optic, as well as wireless technologies and standards. With a focus on practical examples, it helps viewers understand the role of various network components in building efficient and reliable network systems, catering especially to those new to networking.

Takeaways

• 😀 A computer network connects two or more devices to communicate with each other.
• 😀 A hub functions to connect multiple devices but broadcasts data to all devices, reducing speed as more devices are added.
• 😀 A switch also connects multiple devices but sends data directly to the intended recipient, enhancing speed and security.
• 😀 Routers are used to connect different networks, such as a local network to the internet, and route data between them.
• 😀 Access points connect wireless devices to a network, providing internet access without the need for physical cables.
• 😀 A repeater extends the range of network signals, ensuring devices outside of range can still connect.
• 😀 Modems convert analog signals to digital and are essential for internet connectivity, provided by internet service providers (ISPs).
• 😀 Network Interface Cards (NICs) allow computers to connect to a network using various transmission media like wired or wireless interfaces.
• 😀 Transmission media includes cables (coaxial, twisted pair, fiber optic) and wireless media, with fiber optics providing high-speed, long-distance data transmission.
• 😀 Wireless networks rely on electromagnetic waves to transmit data, offering flexibility but varying performance based on standards and frequency.
• 😀 Different types of cables, including twisted-pair and fiber optic, are used for network connections, with fiber optics offering superior performance for long distances.

Q & A

What is the main function of a hub in a computer network?

A hub connects several devices in a network to allow data exchange, including receiving, processing, and forwarding data packets. However, it broadcasts data to all devices connected to it, which can reduce network speed due to traffic division.

How does a switch differ from a hub in terms of data forwarding?

Unlike a hub, which broadcasts data to all devices, a switch forwards data directly to the intended recipient by recognizing the source and destination addresses. This reduces network congestion and improves speed.

What is the purpose of a router in a network?

A router is used to connect two or more different networks, such as a private local network and the internet, enabling data exchange between them. It performs the process of routing, directing data to its proper destination.

What is the key difference between a switch and a router?

A switch connects multiple devices within the same network, while a router connects different networks, such as a local network and the internet, and ensures proper data routing between them.

How does an access point work in a computer network?

An access point allows wireless devices to connect to a local network by transmitting and receiving data using wireless technology. It connects devices such as smartphones and laptops to the network without the need for physical cables.

What is the role of a repeater in a wireless network?

A repeater extends the range of a wireless signal by amplifying and retransmitting it. This allows devices outside the original signal range, like smartphones or laptops, to connect to the network.

What is the function of a modem in a network?

A modem converts analog signals to digital and vice versa, enabling the connection to the internet. It is typically provided by the internet service provider to authenticate and establish the connection to the network.

What is the difference between a coaxial cable, twisted pair cable, and fiber optic cable?

Coaxial cables transmit high-frequency electrical signals and are used in older network topologies. Twisted pair cables (UTP or STP) transmit data using electric signals and are commonly used in modern networks. Fiber optic cables use light to transmit data, offering higher bandwidth, less interference, and longer transmission distances.

What is the significance of the wiring standard in twisted pair cables?

The wiring standard, such as straight-through and crossover cabling, defines how the individual wires are arranged in the connectors. Straight-through cabling is used for connecting different devices (like a computer to a router), while crossover cabling is used for connecting similar devices (like computer to computer).

What are multimode and single-mode fiber optic cables?

Multimode fiber optic cables have a larger core and are used for short-distance communication, while single-mode fiber optic cables have a smaller core and are designed for long-distance transmission, capable of covering distances from tens to hundreds of kilometers.