Overview of internet and intranet

1. Internet - Intranet

2. • OVERVIEW OF INTERNET
• USES OF THE INTERNET
• INTERNET ADDRESSES

3. Domain Names
• Every computer on the Internet has a unique IP address
• A domain name consists of one or more parts,
technically called labels, that are conventionally
concatenated, and delimited by dots, such as
example.com.
• Right most part identify the type of institution, or identify
a geographical location.

4. URL
• Uniform Resource Locator
Syntax
– The scheme name (commonly called protocol)
– a colon,
– two slashes
– a host, normally given as a domain name but
sometimes as a literal IP address
– optionally a port number the full path of the resource

5. INTERNET SERVICES
• Email
• Mail Lists
• FTP
• Instant Messaging (IM)
• IRC
• Newsgroups
• Voice over IP
• World Wide Web (WWW)

6. TYPES OF INTERNET
CONNECTIONS
• Terminal Dialup/Modem (Shell connection)
• SLIP (Serial Line Internet Protocol)
• PPP (Point-to-Point Protocol)
• ISDN (Integrated Services Digital Network)
• DIAS
• Cable Modem
• Digital Subscriber Line (DSL) connection.
• Direct Connection (Leased circuit)
• Satellite connections
• Wireless connections

7. Terminal Dialup/Modem (Shell
connection)
• User requirements limited to modem and
communications software
• Text-only access
• No graphical multimedia support available

8. SLIP (Serial Line Internet
Protocol)
• Utilizes telephone lines
• User must have modem, TCP software,
SLIP software, & software for Internet
applications
• Multimedia access

9. PPP (Point-to-Point Protocol)
• Utilizes telephone lines
• User must have modem, TCP software,
PPP software, & software for Internet
applications
• Multimedia access

10. ISDN (Integrated Services
Digital Network)
• Requires ISDN phone line access
• Faster than analog terminal dialup/modem
service
• User must have ISDN phone line, ISDN
card, communications software, TCP
software & SLIP or PPP software
multimedia connectivity

11. DIAS
• “Always on" internet access
• DIAS combines voice and internet data
packets on a single twisted pair wire at
subscriber premises

12. Cable Modem
• Putting both upstream and downstream
data on the cable television system
• requires two types of equipment: a cable
modem on the customer end and a cable
modem termination system (CMTS) at the
cable provider’s end.

13. Digital Subscriber Line (DSL)
connection.
• DSL is a very high-speed connection that
uses the same wires as a regular
telephone line.
• You can leave your Internet connection
open and still use the phone line for voice
calls.
• The speed is much higher than a regular
modem

14. Types of DSL
• Asymmetric DSL (ADSL) line – The connection is faster for
receiving data than it is for sending data over the Internet
• Very high bit-rate DSL (VDSL) – This is a fast connection, but
works only over a short distance.
• Symmetric DSL (SDSL) – This connection, used mainly by small
businesses, doesn’t allow you to use the phone at the same
time, but the speed of receiving and sending data is the same.
• Rate-adaptive DSL (RADSL) – This is a variation of ADSL, but
the modem can adjust the speed of the connection
depending on the length and quality of the line.

15. Leased circuit
• Used to connect sites within a specific
organization
• Speed varies from 64kbps

16. Wireless connections
• Wi-Fi
• W-Max
• 3G/GPRS/EDGE

17. Comparison

18. Hardware required
• Type of Connection
– Connecting from a LAN
– NIC
– PC with suitable OS
– Connecting Using Cable Modem
– Cable modem
– Connection using ISDN

19. Intranet
• Private version of internet
• May or may not be connected to internet
• Purely for internal information .

20. Applications of intranet
• A complete communication tool
• Corporate documents can be published
• Mailing facilities can be extended
• Proper sharing of information.
• Developing groupware applications.