BAB 5 JARINGAN KOMPUTER DAN INTERNET | JARINGAN LOKAL, INTERNET, KONEKTIVITAS INTERNET | INFORMATIKA

Summary

This educational video explains the basics of computer networks and internet connectivity, focusing on the differences between local area networks (LANs) and the internet. It discusses how LANs connect devices within a limited area, with both wired and wireless options, and explains the global reach of the internet. The video also covers various methods of internet connectivity, including wired (e.g., ADSL, LAN) and wireless (e.g., WiFi, GPRS, satellite). Additionally, it highlights the importance of secure internet usage and data protection through encryption, ensuring a comprehensive understanding of networking essentials for students.

Takeaways

• 😀 Local networks (LAN) connect devices within a limited area like homes, schools, or offices.
• 😀 Internet connectivity allows global data exchange and is based on the Transmission Control Protocol/Internet Protocol (TCP/IP).
• 😀 IP addresses act like home addresses for devices, allowing them to send and receive data on a network.
• 😀 Local network devices use private IP addresses, which are unique within the network, while internet devices use public IP addresses.
• 😀 Internet started as a project by the US Department of Defense in 1969, known as ARPANET, before becoming a public infrastructure in the 1980s.
• 😀 Internet Service Providers (ISPs) are essential for connecting local networks to the global internet.
• 😀 Wired internet connections can include technologies like Dial-up PSTN, ADSL, and LAN networks.
• 😀 Wireless internet options include GPRS, Wi-Fi, and satellite internet, offering varying speeds and coverage areas.
• 😀 GPRS uses radio waves to provide internet on GSM mobile phones and is widely used in mobile data communication.
• 😀 Wi-Fi allows wireless internet connectivity using radio frequencies, commonly found in homes and businesses, with a limited range.
• 😀 Satellite internet uses a satellite dish for high-speed access but is typically more expensive and used in remote areas.

Q & A

What are the main types of networks discussed in the script?

The script discusses two main types of networks: Local Area Network (LAN) and the Internet. LAN has a limited range, while the Internet is a global network that connects devices worldwide.

What is the role of an IP address in a network?

An IP address serves as the unique identifier for each device within a network. It allows devices to send and receive data to and from each other, much like a home address for a house.

What is the difference between a local network and the Internet?

A local network, or LAN, connects devices within a limited area, such as a home or school, while the Internet connects devices globally, providing access to a vast range of information and services.

What is the function of a server in a local network?

In a local network, a server is the device that manages resources and services for the other devices, known as clients, in the network. It facilitates data sharing and communication.

What is the significance of IP private and IP public addresses?

IP private addresses are used within local networks, while IP public addresses are used for devices connected directly to the Internet. The public IP is globally unique and accessible, whereas private IPs are not.

What is the history of the Internet mentioned in the script?

The Internet began as a research project funded by the U.S. Department of Defense in 1969, called ARPANET. It evolved into a public infrastructure in the 1980s, supported by universities and private companies.

What are the types of internet connectivity methods discussed in the script?

The script covers both wired and wireless internet connectivity methods. Wired methods include Dial-up, ADSL, and LAN. Wireless methods include GPRS, WiFi, and satellite access.

How does the ADSL connection differ from dial-up?

ADSL (Asymmetric Digital Subscriber Line) offers higher speeds than dial-up by using a different frequency range for data transmission. While dial-up uses a standard telephone line, ADSL uses a modem and provides faster internet.

What is GPRS and how does it work?

GPRS (General Packet Radio Service) is a wireless internet connection that uses radio waves for data transmission. It is typically used on mobile phones with GSM technology for internet and voice communication.

What are the advantages and challenges of satellite internet access?

Satellite internet provides high-speed access in remote areas, but it can be expensive and has latency issues. The installation requires a satellite dish and a clear line of sight to the satellite.