5.3: the internet and the world wide web

Question 1

IP

Answer 1

split into 4, 8-bit chunkz
each device has an IP adress

Question 2

parts of URL

Answer 2

• scheme
• sub domain
• second level domain
• top level domain
• sub directory

Question 3

URL

Answer 3

• the address of a webpage or other internet resource.
• typically has five parts

Question 4

ISP

Answer 4

• Internet Service Provider
• an organisation that provides you with a connection to the internet.

Question 5

HTML

Answer 5

• Hypertext Markup Language
• standard markup language for web pages.
• Tags are used to specify elements of a webpage
• not a programming language

Question 6

HTTP(S)

Answer 6

• Hyper-Text Transfer Protocol
• protocol used by your web browser to receive web pages.
• provides the set of rules that defines how messages are formatted and transmitted that enables the exchange of data
• HTTPS is the secure version of the HTTP protocol that provides encryption.
• HTTPS encrypts the information that is sent on the network

Question 7

modem

Answer 7

• used to modulate the electrical signal, i.e. to change the signal so that it can be sent through a cable that uses a different technology.
• modems are usually built into the network access device supplied by the internet service provider.

Question 8

router

Answer 8

• When communication happens between two separate networks, a router is required to connect the networks
• In your home network, the network access device will incorporate a router to connect your home network to that of the ISP.
• routers examine the destination of each packet and consult a routing table of known networks.

Question 9

what does ISP stand for

Answer 9

internet service provider

Question 10

switch

Answer 10

• To allow devices to be connected in a way that
  makes cabling easier
• A switch will send a message to its intended destination device.
• The switch builds up a table with the MAC address of every device that is connected to each of its ports. When a signal is received, the data is analysed to determine the destination MAC address. The data is then sent to the port connected to the device with the MAC address

Question 11

what does WAP stand for

Answer 11

wireless access point

Question 12

wireless access point (WAP)

Answer 12

• allow wireless devices to connect to a wired network using Wi-Fi
• They convert data they receive through cables into a wireless signal and vice versa.
• commonly used in public buildings to provide “Internet hotspots”.