COMPUTER & INTERNET

Internet

• The largest interconnected network of computer in the world.

Internet Service

• E-mail = A method of composing, sending, storing, and receiving messages over electronic communication systems.

Internet Service

• Telnet = Telnet is an Internet communications protocol that enables a computer to function as a terminal working from a remote computer .

Internet Service

• FTP = F ile T ransfer Protocol • a commonly used protocol for exchanging files ove

r any network that supports the TCP/IP protocol (s uch as the Internet or an intranet ).

• There are two computers involved in an FTP transf er: a server and a client

• Download – To receive information, typically a file, from another

computer to yours via your modem.

• Upload– To send a file to another computer.

Internet Service

• World Wide Web = A method for providing distributed information on the Internet

3D Map of the World Wide Web

Sun Microsystems, Inc.

Web browsers

• A software application that enables a user to display and interact with text, images, and other information typically located on the World Wide Web.

• Web browsers available for personal computers include Microsoft Internet Explorer , Mozilla Firefox , Apple Safari ,Netscape, and Opera .

IP Address

• IPv4 = IPv4 uses 32-bit (four-byte )addresses, which limits the address space to 4,294,967,296 (232 )possible unique addresses .

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สามารถระบ�เลขไอพี�ได้�ตั�&ง 0.0.0.0 ถ�ง255.255.255.255

• เหล ออ�ก 1 พี�นล�านหมายเลข ( หมด้ภายในอ�ก 20 ปั*)

IPv6

• IPv6 is short for "Internet Protocol Version 6 ". IPv6 is the "next generation " protocol designed by the The Internet Engineering Task Force(IETF) to replace the current version Internet Protocol, IP Version 4 ("IPv4 ").

• IPv6 address space supports 2128

(about 3.4×1038 ) addresses, or approximately 5×1028 (roughly 295 )addresses

http://www.ipv6.nectec.or.th/

Domain Name System (DNS)

– Hostnames that provide more easily memorable names to stand in for numeric IP addresses. • For example www.cmru.ac.th,

www.google.co.th, www.music.com

– Domain Name in Thailand is under the jurisdiction of Thailand Network Information Center: THNIC (ศู�นย์�สารสนเทศูเคร อข่�าย์: www.thnic.co.th) บร�การ

จด้ที่ะเบ�ยนช้ �อ Domain ภายใตั�หมวด้หม+, ac.th, co.th, go.th, net.th, or.th, mi.th, in.th

Synchronous communication(Real-time communication)

• communicate between people in real-time on the Internet .

• various tools and technologies that can be used

• parties requires to be connected at the same time

• support a variety of media types: plain text - full multimedia.

• video or audio conference .

Streaming

• the process of transferring and playing multimedia content from a server to a client player, over a network

• without the need for any intermediate storage on the client system.

Streaming

• Streaming media is a means for one-way communication using audio, video and other media, such as text and still images .

• The user can potentially interact with the media.

• academic content (mostly in the form of lectures is also available as streaming video.)

• radio stations

Search engine

Search engine Sites• A program designed to help find

information stored on a computer system such as the World Wide Web. Like Yahoo, Siamguru, Alta Vista

• There are two different way to search from search engine that are Key Word Search and Directory

Directory

• A web directory is a directory on th e “World Wide Web”

• It specializes in linking to other web sites and categorizing those links.

• Web directories often allow site own ers to submit their site for inclusion, and have human editors review

submissions for fitness.

Click

Click

เพื่ �อเลื อกก�ฬาท��ต้�องการหา

ข่�อมู�ลื

Specific Search engine

• Search engine for the specific subject area ex.

• FindLaw.com = Law and lawyer• SciSeek.com = Science• Biocrawler = Biology, Ecology and

BioTech

Meta Search Engine

• Meta Search Enginge is a search engine that sends user requests to se

veral other search engines and/or databases and returns the results fro

m each one .• They allow users to enter their search

criteria only one time and access seve ral search engines simultaneously.

– Ex.– Search.com– Dogpile.com

ผลการส บค้�น

Directory

ท��เก��ย์วข่�องเพื่ �อช่�วย์ใน

การหาข่�อมู�ลืเพื่��มูเต้�มู

Click

Click

เลื อกเว บท��สนใจเพื่ �อหาข่�อมู�ลื

Reference sites

• websites which work as same as reference book ex. Encyclopedia, Dictionary, Atlas, Almanac, Directory, Handbook, Biographical Dictionary, Geographical Sources– Biography.com– Dictionary.com– Infoplease.com– Artcyclopedia.com– whosaliveandwhosdead.com

News Sites

• CNN Interactive (www.cnn.com)• The New York Times

(www.nytimes.com)• CBS MarketWatch

(cbs.marketwatch.com)

Entertainment Site

• Tourism Authority of Thailand (www.tat.or.th)

• Music.com• Mtv.com

Web blog (n.)

• Web blog is a website where entries are written in chronological order and

commonly displayed in reverse chron ological order.

• "Blog" can also be used as a verb, meaning to maintain or add content

to a blog.

• A typical blog combines – text, – images, – and links to other blogs, – web pages, – and other media related to its topic .

• The ability for readers to leave comments in an interactive format is an important part of many blogs .

• Most blogs are primarily textual, although some focus on

• art (artlog)• photographs (photoblog)• Sketchblog• videos (vlog)• Music and audio • and are part of a wider network of

social media. • Bloggang.com• Gotoknow.org• Oknation.net

-e B ook (Electronic BOOK)

• A book whose contents are in an electronic format.

• Pdf• HTML• Word• Flash• Multimedia• e-book reader = a small, portable

device onto which the contents of a b ook in electronic format can be downl

oaded and read

http://techno.obec.go.th/content/

http://www.thaiebook.org/

e-Journal

• electronic journal – A digital version of a print journal - , or a journal like ele

ctronic publication with no print counterpart made av ailable via the Web, e-mail , or other means of Interne

t access.– The rising cost of print journal subscriptions has led

many academic libraries to explore electronic alterna tives.

– Abstract– Full-text

Scandinavian Public Library Quarterly

http://www.rdi.ku.ac.th/journal.html

http://www.tsdmag.com/

The three basic tools for using the Internet are electronic-mail (e-mail),Telnet and File Transfer Protocal (FTP)

_______________ allow user to _____________ message to each other.

_______________ allow user to _____________ or login to any computer on the Internet.

_______________ allow a ___________ to connect to a ___________computer solely for the propose of transferring file : ___________ (send to the remote machine or _____________(getting back from the remote machine) files and data.

Telnet, E-mail, FTP, Uploading, Downloading, User, Data, Remote, Connect, Send