Internet

By Alexander Pritchard

1)Radio frequency identification.2)Get it from any device and always there for if you

need it.3)Could be a bad connection, could loose it if host

shuts it down and the software4)A computer system that relies on technology 5) In supermarkets

INTERNET• It is a worldwide computer network that

uses protocols to transmit and exchange data.

• NETWORK is an arrangement of intersecting horizontal and vertical lines that is capable of sharing information.

• PROTACOL is a set of rules that allows computer systems to connect with another computer.

FTP - File Transfer Protocol• The File Transfer Protocol (FTP) is a standard

network protocol used to transfer computer files from one host to another host over a TCP-based network, such as the Internet. FTP is built on a client-server architecture and uses separate control and data connections between the client and the server.

Pop – point of provider• Access point to the internet• Location that has all the hardware to allow users

access to the internet• ISP’s may use a number of Pop's in an area to allow

good access to the internet

NAP – network access point• An interchange between networks within the internet• ISP’s can connect with each other

IP – internet protocol• Protocol used to route packets of information across

the internet

TCP• The protocol that takes the data from the application

and passes it to the IP for transfer across the internet• The reverse happens on the other end where the TCP

will reassemble the date.

ISP – internet service provider• ISP’s provide the gateway for the people to connect

to the internet• Examples:- sky, BT, AOL, PlusNet, TalkTalk.• ISP’s commonly provide other services such as TV &

phone packages and a user specific email address.

NOTES• Connecting backbone:- main connecting routes between large networks and local networks

• Server:- computer/program that runs the needs of connected computer

• Router:- directs the data packages to the correct destination/device

• Client:- computer that uses the services provided by the server.

Benefits of Wireless LAN

Mobility Access to real-time information. Supports productivity. Provides service opportunities.

Promotes flexibility. Scalability Patterns are easily changed. Works over great distances. Effective for wide range of user

communities.

Disadvantage of Wireless LAN Environmental Conditions

Prone to weather and solar activity. Constrained by buildings, trees, terrain.

Limit to how much data a carrier wave can transmit without lost packets impacting performance. Cost Wireless network cards cost 4 times more than wired

network cards. The access points are more expensive than hubs and

wires.

Signal Bleed Over Access points pick up the signals of adjacent access points

or overpower their signal.

Wireless!!!!Definition:- Wireless is when you can use the internet without having a wire plugged into your phone, computer, iPad E.T.C

Advantage:- not dragging around a cable and beaning limited to where you can go.

Disadvantage:- can be slower because every object In the way will help to slow it down. Also every device you had will also slow it down.

Broadband

Definition:- connecting using Ethernet cables or connections to their network.

Advantage:- better connection, more reliable, sometimes faster

disadvantage:- less flexible, not completely safe.

Dial-up

Definition:- access a computer system or service remotely via a telephone line.

Advantage:- Low Price, Secure connection – your IP address continually changes, Offered in rural areas – you need a phone line

Disadvantage:- Slow speed, Phone line is required, Busy signals of friends and family members

TXT TALK

FYI – for your information LOL – laugh out loud B4 – before ILY – I love you KIT – Keep in touch 4EVA – forever THX – thanks R&R – read and reply PLS - please

Emails

Facts:- Emails and instant messaging are

two completely different things. When you send an email its stays on

the email server ( E.G:- Hotmail, Gmail etc. ) until the receiver opens it. ( store and forward system )

Basics = address book, attachments and multiple recipients.

Emails

Advantage:- Emails are delivered extremely fast when compared to traditional post. Emails can be sent 24/7, 365 days a year. Webmail means emails can be sent and received from any computer,

anywhere in the world, that has an Internet connection. Cheap - when using broadband, each email sent is effectively free. Emails can be sent to one person or several people. No limit on how many people you can send it to.Disadvantage:- Sometimes the internet might be down so you cant send them. You could get hacked and your email could be changed. The recipient needs access to the Internet to receive email. Viruses are easily spread via email attachments (most email providers

scan emails for viruses for you). Spam - unsolicited email, ie junk mail.

Change the email.

Hi mate.

How are you? Just sending you an email to ask you about the new text books. The class is doing so far so good by the way the students are asking about a trip. Could you email me back to let me know how long you will be getting back to me.

See you later.

Info for emails

TO:- Main RecipientCC:- Carbon CopyBCC:- BLIND Carbon Copy

Starter

SMTP:- Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission.

POP3:- Post Office Protocol 3 is a simple system with limited selectivity. Incoming messages and attachments are downloaded when users check their mail.

IMAP:- The Internet Message Access Protocol (commonly known as IMAP) is an Application Layer Internet protocol that allows an e-mail client to access e-mail on a remote mail server.

DATA EXCHANGE

List of common devices we use IPhone – call people and Snapchat - wireless IPad - face time - wireless Laptop – internet and ppt for HW - wireless House phone – to ring people – phone lines Ps4 – play games - internet cables TV – watch TV and use internet - internet cables Radio – listen to capital and radio one - wireless Xbox – play GTA 5 – internet cables Printer / fax – to fax people invoices – wireless

Data exchange

All methods of passing data between devices, computers and users over a network.

E.G: Computers, phones, machinery etc.

E.G: Audio, video, image and text.

UTP & STP UTP:- Cables are basic pairs of cables twisted

together.

STP:- Cables are basic pairs of cables but they have a foil shield.

Max data transfer= 250 mbps. Max range = 100m. Benefits = twisting cancels out some interface & low

cost. Limitations = slower, less capacity than others & can

only be used for short distances. E.G: analogue telephone network.

COAXIAL

Solid wire core separated from a copper outer by a plastic insulated shield.

The inner cable transmits data and the outer connects to the earth.

Max data transfer = 1000mbps. Max range = 100m. Benefits = fast & reliable. Limitations = costs more than

UTP/STP. E.G:- connection to TV

networks/aerial.

Fibre optic A technology that uses specially designed bundles of

transparent fibres to transmit light. Note: Some of the applications of fibre optics are in medicine, where it is used to view otherwise inaccessible parts of the body, and in telecommunications, where it is used to transmit data of all types.

Max data = 2.4gbps. Max range = 50km. Benefits = fast, long distances & littler interface. Limitations = complex connection and equipment

needed. E.G:- Fibre optic broadband- connects to the BT panels

n the street then use coaxial cables to the house.

infrared

Short range data transmission using infrared light.

Max data = 4mbps. Max range = 100m. Benefits = reliable. Limitations = short range, device

must be in the line of sight. E.G:- TV controllers & some phones

now have infrared.

Microwave

Short wavelength radio transmission at very high frequency.

Max data = 300gbps. Max range = 100m. Benefits = signal does not degrade

over long distances. Limitations = device must be I the

line if sight & is affected by weather. E.G:- Bluetooth.

SATELLITE

Data is transmitted from the earth to a satellite which relays it back to another station on earth.

Max data = HUGE!!!! Max range = 500km to 36,000km Benefit = distances & speed Limitations = expensive!! E.G:- global communication systems.