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Understanding the Internet
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Understanding the Internet
Understanding the Internet
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1
Question
What is the Internet?
Answer
The Internet refers to all the networks around the world that are connected to one another. There is no centralized controlling agency that oversees the Internet.
2
Question
What governs the establishment of IP addresses and domain names on the Internet?
Answer
The establishment of IP addresses and domain name identification and control are managed and maintained by the Internet Corporation for Assigned Names and Numbers (ICANN).
3
Question
What is the Internet backbone?
Answer
The Internet backbone consists of large fiber optic bundles that connect various networks together.
4
Question
What are nodes in the context of the Internet?
Answer
Connection points in the Internet are called nodes.
5
Question
What is a server?
Answer
Data on the Internet are usually stored on specialized computers called servers.
6
Question
What hardware is used to transfer data between networks on the Internet?
Answer
Data are transferred from one network to another through hardware called routers.
7
Question
What are packets?
Answer
Information sent over the Internet is transferred in small groupings called packets.
8
Question
What is the difference between circuit switching and packet switching?
Answer
Circuit switching creates a dedicated physical path for information, while packet switching breaks information into units called packets and does not rely on a dedicated physical path.
9
Question
What is SAGE?
Answer
SAGE refers to the Semi-Automatic Ground Environment network developed in the 1950s, which used packet switching to link radar stations together.
10
Question
What is ARPAnet?
Answer
ARPAnet was the forerunner of today's Internet, designed to connect computer networks of several universities and military use.
11
Question
What do Internet Service Providers (ISPs) do?
Answer
Internet Service Providers (ISPs) provide customers with Internet access for a fee.
12
Question
What are some types of Internet services offered by ISPs?
Answer
ISPs offer services including fiber-optic, cable, DSL, dial-up, and cellular.
13
Question
What is net neutrality?
Answer
Net neutrality is the concept that ISPs must permit data to be transmitted and accessed by users without regard to the data's content or amount of bandwidth required.
14
Question
What does bandwidth refer to?
Answer
Bandwidth refers to the volume of data that can be carried by a transmission medium each second.
15
Question
What is broadband?
Answer
Broadband describes Internet service that is always connected and is much faster than dial-up connections.
16
Question
What does transmission media refer to?
Answer
Transmission media describes the means by which the Internet signal is carried.
17
Question
What is coaxial cable?
Answer
Coaxial cable is composed of a single copper wire with a braided wire shield, capable of high-speed Internet transmission.
18
Question
What is fiber-optic cable?
Answer
Fiber-optic cable uses light waves to carry Internet signals at extremely high speeds and is used for long-distance transmission.
19
Question
What is Ethernet cable?
Answer
Ethernet cable, also called computer cable, is designed to connect computers and digital devices, composed of multiple pairs of telephone wires.
20
Question
What is cellular Internet service?
Answer
Cellular Internet service is the fastest-growing Internet service, allowing users to access the Internet via their smartphones.
21
Question
What is a modem?
Answer
A Modulator-Demodulator or modem is a device that converts incoming modulated signals into digital signals and outgoing digital signals into modulated signals.
22
Question
What are microwave Internet signal transmissions used for?
Answer
Microwave transmissions are used to transmit Internet signals over long distances, particularly in areas where wired transmissions are impractical.
23
Question
What are the main communication devices used to connect to the Internet?
Answer
Modems, routers, switches, and MAC addresses.
24
Question
What is the role of a modem in Internet connectivity?
Answer
Modems convert analog wave signals into digital signals.
25
Question
What is the maximum speed of the Wi-Fi protocol 802.11n?
Answer
600Mbps.
26
Question
What are dual-band routers?
Answer
Dual-band routers are Wi-Fi capable routers that use both shorter- and higher-frequency signals to transmit data.
27
Question
What is the function of a router in a home network?
Answer
A router connects two networks, for example, a home network to an Internet service provider's network, and serves as a gate that protects the home network.
28
Question
What is a hardware firewall?
Answer
This protection provided by a router that safeguards a home network.
29
Question
What is the difference between wired only and wired-wireless routers?
Answer
With a wired only router, Ethernet cables connect the router to computers, while a wired-wireless router also transmits Wi-Fi signals.
30
Question
What do switches do in a network?
Answer
Switches connect devices that are within the same network and ensure that the correct data are sent to and from the correct device.