Module 4: Networking

Question 1

Network

Answer 1

An interconnection of computers

Question 2

Internet vs Web

Answer 2

The internet is the physical connection of computers and wire around the world. The web is the information on the internet.

Question 3

Do clients connect directly to the internet?

Answer 3

No, clients connects to an ISP network

Question 4

How is data moved through a network?

Answer 4

Data is broken down into packets of binary bits, before it is send across a network.

Question 5

Different ways to connect to the internet

Answer 5

1. Ethernet Cable
2. Wi-Fi Connection
3. Fiber optic Cable

Question 6

Switch

Answer 6

Switches turn one ethernet port into multiple ethernet ports connecting devices within a network and enable efficient data transfer using MAC addresses.

Switches are usually connected to a router which handles assigning Ip addresses to devices on network

Switch is a data link layer device i.e. layer 2.

Question 7

Router

Answer 7

Routers routes data from one network to another network. It determine the best path for data transmission based on IP addresses.

For example connecting a LAN with the ISP Network

Router is a network layer device i.e. layer 3.

Question 8

Hub

Answer 8

Hubs are like an unintelligent switch, it simply broadcasts data to all connected devices, without analyzing the data. If a signal comes into the hub, the hub broadcasts that signal to all other devices connected to it.

Hub is a physical layer device i.e. layer 1.

Question 9

Can hubs and switches connect to external networks?

Answer 9

No. Hubs and Switches are used to connect device in a local area network or LAN and cannot connect to an external network because that would require the ability to read and process IP addresses.

Question 10

Difference between hubs, switches and routers?

Answer 10

hubs and switches are used to create networks, while routers are used to connect networks

Question 11

Network Stack

Answer 11

A set of hardware or software that provides the infrastructure for a computer

Question 12

ICANN

Answer 12

Internet Corporation for Assigned Names and Numbers.

All domain names need to be registered with ICANN

Question 13

DNS

Answer 13

Domain Name Server - A server that maps Domain names with IP addresses

Question 14

DNS Lookup

Answer 14

Whenever a domain name is typed into the URL bar, the browser performs a DNS lookup to find the IP address associated with the domain name.

Question 15

IPV4

Answer 15

An 32 bit Ip address separated into 4 groups

Question 15

Who created the internet?

Answer 15

Researchers at DAARPA

Question 16

What kind of address does a device need to connect to the internet

Answer 16

An Ip address

Question 17

IPV6

Answer 17

A 128 bit hexadecimal Ip address

Question 18

NAT

Answer 18

Network Address Translation. Translates one IP address into another IP address (Public to Private and vice versa)

Lets organization us one public ip address and many private IP addresses within the network

Question 19

IOT

Answer 19

Internet of things. Devices, fridges, cars, and smart phones connected to the internet.

For example, using your smart phone to control smart devices in your home.

Question 20

ARPANET

Answer 20

ARPANET: The earliest version of the Internet that we see today, created by the US government project DARPA in the 1960s

Question 21

Difference between public an private ip addresses

Answer 21

Public: 68.94.234.13

Private: 10.0.0.1

You cannot access the internet with a private ip address, as it is not publicly registered. Can only be used on private networks