Wednesday, September 19, 2018 What Is the Internet? A global network connecting millions of computers. Countries are linked into exchanges of data, news and opinions. Web Vs. Internet Internet Origins CBC – Internet Emerging Trend

Internet – Terms To Know IP Number/Domain Name Client/Server HTML Code TCIP/IP, HTTP, FTP Firewall Bandwidth Cookies

How do you get on? Via Internet Service Provider (ISP) Wednesday, September 19, 2018 How do you get on? Via Internet Service Provider (ISP) Via direct network connection using a shared high-speed line on Local Area Network (LAN) Wireless Mobile – Internet Stick Satellite 3G - Services

Connecting via Internet Service Provider Wednesday, September 19, 2018 Connecting via Internet Service Provider Gives you direct access via a DSL, dialup or cable connection Offers a few services, however their main service is just a connection What services does your ISP provide to you?

What services does your ISP provide to you? Who has Shaw Cable Internet? http://www.shaw.ca/en-ca/ProductsServices Who has a TELUS connection? http://www.mytelus.com/internet/highspeed/prices.do

Wednesday, September 19, 2018 Bandwidth The bit capacity of a channel, usually measured in bits per seconds Digital Subscriber Line (DSL) or Asymmetric DSL (ADSL) Optimal: 6-8 Million bits per second (Mbps) downstream Optimal: 512 Thousand bits per second (Kbps) upstream Transmission speeds depends on quality of the phone lines, equipment, distance from the PC to switching office (18,000 ft.) Which one is shaw/telus Simple 2 question survey Shaw or Telus? Why go with one over the other?

Bandwidth Cable modem Optimal: 10 Mbps downstream The bit capacity of a channel, usually measured in bits per seconds. Cable modem Optimal: 10 Mbps downstream Optimal: 2 Mbps upstream Broadcast Media: Transmission speeds depend on how many people are connected to distribution hub, everyone connected to same hub receives everyone else’s downloads. (What might be problems?)

Connect via Network Connection Wednesday, September 19, 2018 Connect via Network Connection Wired into Internet via LAN Types of line connections: DSL line (9 M bps) T-1 line (1.544 M bps) T-3 line (44.736 M bps) Differences between DSL, T1, T3

IP Numbers & Domain Names Wednesday, September 19, 2018 IP Numbers & Domain Names Every machine on the Internet has a unique identifying number, called an IP Address. IP stands for Internet Protocol, which is the language that computers use to communicate over the Internet. A typical IP number looks like “216.27.61.137” To make it easier for us humans to remember, IP addresses are mapped onto domain names like www.ualberta.ca. One domain name can represent more than one IP address

Publishing up a web site Wednesday, September 19, 2018 Publishing up a web site Is your domain name taken? http://www.internic.ca What is a web server? http://www.webopedia.com/TERM/W/Web_server.html http://www.webopedia.com/DidYouKnow/Internet/2003/HowWebServersWork.asp A Client is the person/computer requesting for the information. A Server is the person/computer sending the information.

URL: Access Methods TCP/IP Wednesday, September 19, 2018 URL: Access Methods TCP/IP TCP/IP – Transmission Control Protocol / Internet Protocol The suite of communications protocols used to connect hosts on the internet. so that they can send information back and forth for a period of time in the form of packets. Packet switching refers to a set of protocols in which messages are divided into packets before they are sent. Each packet can follow different routes to its destination. Once all the packets forming a message arrive at the destination, they are recompiled into the original message. http://www.webopedia.com/TERM/P/packet_switching.html

URL: Access Methods HTTP Wednesday, September 19, 2018 URL: Access Methods HTTP http:// Hypertext Transport Protocol - http://www.somewebsite.com/index.html Short for HyperText Transfer Protocol, the underlying protocol (list of rules) used by the World Wide Web. HTTP defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands like sending and receiving webpages.

URL: Access Methods FTP Wednesday, September 19, 2018 URL: Access Methods FTP ftp:// File Transfer Protocol - ftp://www.somewebsite.com/stuff.exe File Transfer Protocol, the protocol (set of rules) for exchanging files over the Internet. FTP works in the same way as HTTP is used for transferring Web pages from a server to a user's browser. FTP is most commonly used to download a file from a server using the Internet or to upload a file to a server (e.g., uploading a Web page file to a server).

Wednesday, September 19, 2018 Cookies A Cookie is text file that a Web server can store on a user's hard disk. Cookies allow a Web site to store information on a user's machine and later retrieve it. A Web page may contain images or other components stored on servers in other domains. Cookies that are set during retrieval of these components are called third-party cookies. Windows XP - C:\Documents and Settings\<username>\Cookies\ Windows Vista C:\Users\<username>\AppData\Roaming\Microsoft\Windows\Cookies\ http://www.webopedia.com/DidYouKnow/Internet/2002/Cookies.asp

Wednesday, September 19, 2018 Firewalls A firewall is a program or hardware device that filters the information coming through or leaving through the Internet connection to you private network or computer system. Best Firewalls 2010

Internet Appilcations in Education Elluminate WebQuests Online Reference Collections Video Conferencing