Internet

Question 1

Define Internet

Answer 1

Global network of interconnected networks that communicate using a common set of standards and protocols

Question 2

How to connect to internet

Answer 2

Internet Service Provider
-Telephone line, fibre optic cable, …G, satellite

• Supplies device (hub) that provides outgoing connection from home network to service provider
• Ethernet Switch with ports for wired devices
• WAP (Wireless access point)
• Router manages connection
• Modem converts signal to suitable type

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Question 3

Define Router

Answer 3

Networking Device that forwards data packets between networks

• Edge: one network to another, subscriber (home), Enterprise (business)
• Core: Internet BackBone

Question 4

Define Packet

Answer 4

Made up of data

• Header
• Payload

Question 5

Define Packet Switching

Answer 5

• Router examines destination
• Decides which interfaces to send packet to
• Routing table
• Hop: Router-to-router
• Constantly updated on optimal routes
• if busy, buffered in memory
• Time To Live (stops loops)
• Source and destination check that everything is sent correctly

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Question 6

Define Domain Name

Answer 6

User-Friendly Names that save us from having to remember IP addresses

Question 7

Define Uniform resource Locator

Answer 7

• Unique identifier of resource

- Specifies location of resource and protocol to access resource

Question 8

Define Fully Qualified Domain Name

Answer 8

-Indicates the position of a host relative to the root of the internet

Question 9

Define Order of URL

Answer 9

• Scheme (Protocol, specifies the syntax needed for remainder of URL, e.g. HTTPS)
• FQDN (Host e.g. www.___)
• Domain Name (authority)
• Path (path followed on the host for access)

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Question 10

Define Internet Registry

Answer 10

-Maintain definitive register over who owns a specific domain

Question 11

How to access website

Answer 11

• Host site on a web server
• Associate server’s IP address with your Domain Name
• Copy of page in browser cache?
• Domain Name Server lookup finds new copy of web page
• Gets IP address of host
• Send request for web page

Question 12

Define Registrar

Answer 12

-Organisation that help to secure and register domain names.

Question 13

Define Domain Name Server System

Answer 13

Database where domain names are located and translated into IP addresses

Question 14

Define IP address

Answer 14

• Internet Protocol

- Identifier for a device on a network