4. The Internet

Which of the following statements are true about the Internet?

I - The Internet connects devices and networks all over the world

II - The Internet helps people collaborate to solve problems

III - The Internet helps people communicate

IV - There are no negative consequences of the Internet, it is purely positive

I, II, and III

What is the latency of a system?

The time it takes for a bit to travel from sender to receiver

What is the bitrate of a system?

The amount of data (in bits) that can be sent in a fixed amount of time

How is the bandwidth of a network measured?

Bitrate. Higher bitrate means higher bandwidth.

What is the Internet Protocol (IP)?

A protocol that defines the structure of an Internet address and assigns a unique address to every device on the Internet

Suppose we used an Internet Addressing protocol that used 4 bits to encode a single address. How many devices would be supported on the Internet? How many unique addresses would there be?

16

According to the Domain Name System (DNS), which is a subdomain of the domain example.com?

about.example.com

What is the function of the Domain Name System (DNS)?

To translate domain names into IP addresses

Which of the following are true about Internet routing?

I - For any two points on the Internet, there exists only one path between the two points

II - Routing on the Internet is fault tolerant and redundant

II only

What information is contained in a packet?

A small part of a digital message, and metadata about the message, including where it came from and where it is going

The Internet is available to everyone in the world (T/F)

False

What is the purpose of the Digital Millennium Copyright Act?

To criminalize the act of circumventing, or getting around, access controls that block access to copyrighted works.

Network

A group of 2 or more computer systems linked together

Networks are typically connected through...

Routers

IPv6

A new 128 bit version of the Internet Protocol

IETF (Internet Engineering Task Force)

An open community of engineers, designers, vendors, and researchers concerned with the evolution and smooth functioning of the internet.

Domain examples

google.com

codehs.com

wikipedia.org

Routing

The process of sending data between two computers on the Internet. The data is sent through routers that determine the route.

TCP (Transmission Control Protocol)

TCP is a protocol that allows for sending multiple packets between two computers. TCP checks that all packets arrived and that they could be put back together in the proper order.

HTTP (Hypertext Transfer Protocol)

Protocol that standardizes the language for talking to web servers to send and receiving web resources