computer & internet. internet the largest interconnected network of computer in the world
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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 .
• ระบบตั�วเลขไอพี�ที่��ใช้�ในปั�จจ�บ�นเปั�นระบบ ไอพี� เวอร�ช้�นที่��4 (IPv4 ) ซึ่��งจะเปั�นระบบ 32 บ�ตัหร อ
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
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