Internal architecture of isp 54
-
Upload
myrajendra -
Category
Documents
-
view
2.049 -
download
6
Transcript of Internal architecture of isp 54
* 1
Sub topic : Internal architecture of ISP
.
* 2
Recap
In the previous class, you have learnt about
• ARPA Net (Advanced Research Project Agency Net)
• WWW (World Wide Web)
* 3
OBJECTIVES
On completion of this period, you would be able to know about
• ISP
• Typical ISPs
• Types of ISPs
• ISP connection options
• Internal Architecture of ISP
* 4
ISP is an Internet Service Provider that provides
• Internet access to the Individuals
• Internet access to the Companies
• Services such as web site building and virtual hosting
• It can also be called as a Internet Access Provider.
Internet Service Provider
* 5
Typical ISPs
• WorldNet
• AT & T
• IBM Global Network
• MCI
• Netcom
• UUNet etc
* 6
Depending on the Range ISPs can be
• Local ISPs
• Regional ISPs
• National ISPs
• International ISPs
Types of ISPs
* 7
ISP ISP ISP ISP
Regional ISP Regional ISP
National ISP
X X
X XXX
Fig 1.Structure of a national ISP
…….
* 8
National ISP
National ISPNational ISP
National ISP National ISP
NAP
xx
x
Fig.2.Interconnection of national ISPs
* 9
• Home user connection
• Business connection
ISP Connection Options
* 10
• Dial-up
• DSL
• Broad band wireless access
• Cable Modem
• ISDN
Typical Home user connections
ISP
* 11
• DSL
• SHDSL
• Ethernet Technologies
Typical Business connectionsISP
* 12
Fig.3.Internal Architecture of ISP
Router
Router
Internet
SUBSCRIBERS
Set of modems
Remote access server
SMTP server
Web Server
* 13
• Set of Modems
• Remote Access Server
• SMTP Server
• Web Server
• Routers
ISP Architecture consists of
* 14
• Convert Analog signal on the line to the Digital
• Connect ISP to the Subscriber
Set of Modems
* 15
Remote Access Server
• All subscribers are connected to RAS through set of
modems
• Maintains database of valid user id and password
• It also verifies user id and password
* 16
• It is Simple Message Transfer Protocol
• It stores subscribers e-mails until the subscriber connects
to the internet
• It sends and receives mails on behalf of its subscriber
SMTP Server
* 17
• Subscribers can create their own web pages
To provide value added services such as
• News update
• Weather information
• Technical updates
• Sports updates
• Chat facilities
Web Server
* 18
• It maintains routing tables
• Subscribers may be connected to the Internet
through Routers
Routers
* 19
In this class, you have learnt about
• ISP (Internet Service Provider)
• ISP types
• Its Internal Architecture in detail
Summary
* 20
(1) The function of RAS is
(a) To Authenticate the subscriber
(b) To maintains database of valid users
(c) a&b both
Quiz
21
(1) Define ISP
(2) Explain the Internal Architecture of ISP
Frequently Asked Questions