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Internet Services - World Wide Web - E-mail - Conferencing and Newsgroups - File Transfer & Updating - Chat/Instant Messaging
Internet Services- World Wide Web- E-mail- Conferencing and Newsgroups- File Transfer & Updating- Chat/Instant Messaging
Intranet- Looks like the internet – web pages
which open up on a browser, - A LAN or WAN used by schools,
businesses etc to communicate internal information.
Internet UnitDefine the terms
- ISP- Browser- Search Engine
ProtocolsDefinition
A set of formalized rules thatdescribe how data is transmittedover a network.
Internet transmission
protocols • TCP/IP - Transmission Control
Protocol/Internet Protocol • A recognised set of protocols transmission
protocol for all Internet transmission.• TCP divides a message into blocks of data,
called packets
TCP/IP• TCP divides a message into blocks
of data called packets • A router then forwards these
packets to a destination device Message
Packet 1 Packet 2 Packet 3 Packet 4
TCP/IP Advantages• Industrial Standard• Routable – can be sent through
many different types of routers• Robust – used for many years• Scalable – can be used small &
large networks.
Internet protocols IP provides routing devices – specialelectronic switches – with the source anddestination web addresses, which are usedto connect the Internet user with the webserver. The routing device then forwardsthe packets to the destination address.
IP Addresses- The internet connects millions of
different network hardware hosts- Each host – computer, router, printer is
identified by a unique IP address
- http://www.hostip.info/ This website tells you the IP address of your own computer
IP Addresses
- Using http://www.hostip.info/ find out where the following sites are
- 160.60.160.60- 160.80.160.60- 255.255.255.255- 216.27.61.137- 80.176.88.213- 84.69.1.207
Now find out your own IP address http://whatismyipaddress.com/
IP Addresses
IP Address URL
72.14.253.104
194.154.164.90
69.147.114.210
72.21.210.11
193.95.148.90
66.230.200.100
Questions 1. Complete the words • T_ _ _ _ _ _ _ _ _ _ _ Control P_ _ _ _ _ _ _• I_ _ _ _ _ _ _ P _ _ _ _ _ _ _2. What is a Protocol?3. In addition to the www name the four other internet services4. What is an intranet?5. What is an IP address and what does it look
like?
IP Addresses The Internet connects millions of different network hardware components together (host).
Each host – computer, router, printer, etc – is identified by a unique Internet Protocol Address, or IP address. An IP address appears as a dotted decimal number.
Internet Service Protocols
1. HTTP (HyperText Transfer Protocol)
• HTTP is the service protocol that allows users to receive information from the World Wide Web.
• HTTP protocol identifies and downloads web page resources
HTML tags HyperText Markup Language - a setof codes and script that allows webpages to be formatted and designed
Quiz
2. File Transfer ProtocolFile Transfer Protocol allows an
Internet user to send (or receive) copies of files from or to different computer systems or networks
3. POP/SMTPSimple Mail Transfer Protocol is
usedto transfer e-mail between computersystems. - Incoming e-mail is stored on the ISP’s
server.- It deals with outgoing emails
3. POP• Post Office Protocol is also used to
transfer e-mails between computer systems. POP offers more facilities than SMTP and allows automatic download of e-mails.
• POP is the receiving system for most Internet-based e-mail systems (i.e. your incoming mail).
Questions 2• What does POP stand for? Post Office Protocol• What is a protocol? Agreement or set of rules
involving 2 or more parties• What does HTTP stand for and where would
you see it? • Hypertext transfer protocol• What is a NAP? Network Access Point• What does IP stand for? Internet Protocol
HTML Questions1. What does the <br> tag do?2. What does the <body> tag do?3. What does </html> do?4. What does <td> do5. What does <href do?
AnchorsHTML code (tag) that allows a piece oftext or a graphic on a web page tobecome interactive.Can take you to
- another place on the same web page- another website
HyperlinkHTML attribute of an anchor. The
codebehind it.
What do you need for Internet Access
Client Side - • Computer• ISP• Browser• Modem/Router• Phone line
TYPICAL HOME INTERNET CONNECTION
TYPICAL OFFICE INTERNET CONNECTION
TaskGo to webopedia.com and get a one
line definition for the following- ISP- Browser- Modem- Router
Recent Developments
- Broadband- Wireless Technology- Mobile Internet
Broadband TaskSearch the internet for four ISPproviders and for each one find out theMb and cost and complete the tableBelow.
Name of Provider Cost (£) Mb
http://www.broadbandchecker.co.uk/?GTSE=goog>KW=broadband
Internet ServicesDefine the following
Web PageWeb SiteWorld Wide WebThe Internet
Business Web ServicesE-Commerce*E-BankingE-Marketplace – B2BE-SalesE-Government*
Go to webopedia.com and get a one line definition of the starred ones
Personal Web ServicesUse your internet mind map to
come upwith a list of personal web services. Chat rooms news
Searching blogs
Email planning
Online booking –holiday education
Online shopping auctions
Downloading charity
TV online conferencing
Gambling
E-MailMailbox - Attachments –
Client Based E-Mail uses - POP- SMTP All users have a separate account.
E-MailWeb Based E-Mail
- Examples include Hotmail.- Uses HTTP protocol.- You must be connected to the
www to read and send e-mail.
Conferencing and Newsgroups
1. Search newsgroups on Google2. Go to newsgroups3. Browse all categories4. Choose Europe5. Choose UK6. Now look through the newsgroups
and choose one that interests you.
FTP software• Used to upload and download files
How a web address is made upHow a web address is made up
http://www.computing.com/int2/car.html
Page is to be retrieved using hypertext transfer protocol
Name of the Web Server that has the page
The Directory where the page can be found on the server
The Name of the web page. Often end in html or htm
Network Strategy• An organisation needs a network strategy
initially to plan how to set up the network in general to manage effectively its distribution of data and information to assist its decision-making and general operation. The network strategy should be based on sound fundamentals so that no matter the advances in technology the network will be able to adapt and still deliver the services the organisation requires. The strategy needs to address the following areas:
• Data transfer (traffic)• Distribution/coverage• Access and security• Facilities• Storage capacity.
Backup and recovery strategy
• An organisation needs a backup and recovery strategy to ensure that operational data is not accidentally destroyed or damaged. As organisations rely more and more on information systems to store and process their data, it is vital that processes and procedures are
introduced to ensure data is kept safe from loss or harm.
Storage CapacityHierarchy of Memory Capacity
1byte = 8 bits1KiloByte = 1024 bytes1MegaByte = 1024 Kbytes1GigaByte = 1024 Mbytes1TeraBytes = 1024 GBytes
