Transcript types of service providers

Chapter 6
Internet Service Providers
Hosting Your Web Site
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OBJECTIVES
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How ISPs Work
How to Choose an ISP
How to Choose and Register Your
Domain Name
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Introduction
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Before you complete the design of web site, you
need to find a way to put it on the Internet.
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Internet Service Provider
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A specialized company that connects customers with
PCs and browsers to the Internet
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Introduction
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1969 only four hosting company exist
1985 there were 1,960 companies
By 2005 there were more than 3,000ISPs in the
USA and more than 15,000 world wide
For a fee, the ISP gives you a software package,
a user name and password, and an access
number to connect to the Internet
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Introduction
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ISPs provide
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Virtual hosting ( virtual domain ):- a company with its
own domain name, hosted by an ISP to conduct
business via the internet.
Domain name: a company’s identifier in cyberspace
 Allow you to have your own domain name such as
www.yourcompany.com
 Rather than using your ISPs domain name
www.isp.com/yourcomany/
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Introduction
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Most of MS to S organizations turn to ISPs for
the following
1.
2.
3.
Companies need a full time stuff and webmaster to
handle day to day changes and enhancement to the
site
ISPs generally provide free management for websites,
such as security, and backup
ISPs have high speed connectivity
T1 and T3 lines to main Internet hubs
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Introduction
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T1 line transmit long distance data at 1.5
megabits ( million bits) per second
T3 line with capability of transmitting 44.7
MBit per second
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Introduction
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Most of MS to S organizations turn to ISPs for
the following
4. ISPs can handle real access and real physical security,
from power supplies and air conditioning to network
links
5. ISPs often have the latest technology for thousands of
customers (cost)
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HOW ISPs WORK
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ISPs are cheaper, more reliable, and provide
services that are difficult to match in house
To access web site, it has to be stored on a web
server that is always connected to the Internet
by a high-speed link, Infrastructure includes
the following
1.
Standby Electric Power
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2.
To keep the site available in the event of a blackout
Redundant “Fault-Tolerant” Servers
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To ensure that your web site will continue in the event a
hard drive or a server breaks down
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HOW ISPs WORK
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Web Site Infrastructure
3. Redundant Communications Lines
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To keep your site active in the event of phone line or a
router goes down
4. One or More Firewalls
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To protect your site from hackers and unauthorized
access
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TYPES OF SERVICE
PROVIDERS
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Internet Service Provider (ISP)
Application Service Provider (ASP)
Business Service Provider (BSP)
Wholesale Service Provider (WSP)
Wireless Application Service provider (WASP)
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TYPES OF SERVICE
PROVIDERS
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Internet Service Provider
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Specialized company that connects customers with PCs
and browser to the internet
Allow user to access the Internet via modem using a voice
telephone network or directly via cables.
Provides an interface between the public phone system
and Internet digital phone lines, which carry packets
instead of voice conversation
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TYPES OF SERVICE
PROVIDERS
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Application Service Provider
A company that offers packaged software for
lease online
 Application renter
 Focuses on high end application like database
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These applications are expensive, take a lot of time to
install, and hard to manage
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TYPES OF SERVICE
PROVIDERS
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Business Service Provider (BSP)
Internet service developer that rents only its own
proprietary application via web
 Generally the software is specific in function
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TYPES OF SERVICE
PROVIDERS
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Wholesale Service Provider (WSP)
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Service provider that packages a selection of
BSP application for distribution online
fall into one of three categories
1.
2.
3.
Large wholesale access provider
Smaller Internet backbone
Local ISPs
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TYPES OF SERVICE
PROVIDERS
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Wireless Application Service provider
A company that offers untethered application
 Responsibilities involve hosting, developing, and
manage applications
 WASP infrastructure require integration between
the web and the wireless network
 Deal with a wide range of hardware and mobile
devices and wireless networking protocol
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TYPES OF WEB HOSTING
SERVICES
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1.
2.
3.
4.
Web hosting : providing, managing, maintaining
hardware, software, integrity, security, and
reliable high speed Internet connection
Dial-Up Access
Developer’s Hosting : customer focused
Web Hosting: provides variety of services
Industrial Strength Hosting: more reliable
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Packets, Routers, and Lines
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On the Net, Information is sent and receive in
packets, which is small in size
Packets can take a different route across the Net
Packets may arrive at different time and different
order.
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Packets, Routers, and Lines
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Conversion from analog to digital and vice versa
introduce noise, noise limits certain modem to
33,600bps.
If the packets coming from the ISP to the phone lines
could remains digital all the way to the customer, data
could be sent at 56K from to ISP to customer
The way to do this for customer is to get (ISDN)
Integrated services digital network line from their phone
company
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The Connection
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When you dial into an ISP you dial into router
owned by the ISP
Also ISP has a router connected to the larger ISP,
this second router is the gateway to the Internet
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HOW TO BECOME AN ISP
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1.
ISPs have 3 major target market
Residential
Fastest growing segment
2.
Commercial
Included e-commerce and e-business
Most critical service to provide
High level of quality
Dedicating connection
security
3.
Public
Like universities, schools, …
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ISP Services
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An ISP is expecting to provide the following
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Domain Name Service (DNS)
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A repository where the domain name for each ISP is stored
E-mail
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The most commonly used service on the Internet
ISP must dedicated a separate server for e-mail
Key to consider mail storage capacity and maximum size
for each user
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AN ISP Services
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An ISP is expecting to provide the following
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Radius server
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A network access server that authenticates a user ID and
password and trigger accounting to complete the customer
chargeable session
The network access server forward request to this server
database to authenticate a user Id and password, if the
combination is valid the request is accepted, otherwise is
rejected
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ISP Services
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An ISP is expecting to provide the following
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WWW server
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FTP
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Can be run on the same hardware as DNS, e-mail, and
Radius system.
Accept connection form client trying to connect to its
server
Internet relay chat (IRC)
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Text-based chat service, where users connect to local server
as part of a larger network of IRC servers
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ISP Services
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An ISP is expecting to provide the following
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News server
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Internet network news is becoming more popular, because
there is so much data traffic for news
HTTP proxy service
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Generates and manages a local store of Internet objects
such as web pages, images, or FTP and deliver the objects
when requested (caching)
When a web page is requested, the proxy server examines
its internal database to see if the page is store in the cache
Minimize data traffic, speed up request
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Technical Services
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Local loop:
the connection between the provider and the
physical location
 Cost depends on the size and distance from the
provider and local telephone company central office.
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Several cable-based options are available, The
include T1 and T3 lines, fiber optic, and number
of server
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Technical Services
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Broadband connection
The Speed of the old dial-up service via modem
 Broadband communication can carry multiple
messages simultaneously over the same medium
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Broadband for home access
1.
Cable modem:
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Digital subscriber line (DSL)
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3.
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First introduce in 1995
Is ideal for homes that that are within four miles
of central office
Speeds are rated at 50 times faster than cable
modem
Fiber-optic network
Wireless technology
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HOW TO BECOME AN ISP
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Contract with a regional network providing with
bandwidth
Procure a leased communications line to one of the
company’s routers
Procure hardware and software to manage Internet
communication
Set up dial-in lines to connect users
Maintain enough manpower to manage ISP traffic and
deal with users
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Factors in choosing an ISP
1.
2.
3.
4.
5.
6.
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9.
Bandwidth
Connection availability
Customer volume and traffic
Traffic volume during peak hours
Virtual hosting feature
Capacity of e-mail box
Stability and staying power
Customer service and local support
Price
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HOW TO CHOOSE AN ISP
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Bandwidth Size
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E.g. High-speed T1 and T3 lines
Connection Availability and Performance
Are the most important criteria in evaluating an ISP
 Normal: 5 – 10MB
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Virtual Hosting
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Allow you to have your own domain name
E-mail Aliases
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An ISP allows a certain number of e-mail addresses
per account
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HOW TO CHOOSE AN ISP (cont.)
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Stability and Staying Power
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Local Access
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Does your ISPs have a 24-hour support line that you can call
Reliability
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You need to know how many local access numbers an ISPs
has and how they are a available to use
Customer Service and Technical Support
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How often customers switch from one ISPs to another
Staying power: is the ISPs ability to continue to provide
services.
Delays, busy signals while trying to log on, or slow down
How quickly you can go online depends of the time of the
day
Price
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ISP NEEDS FOR ONLINE
MARKETING
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Register Domain Name
Capture and Forward E-mail
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Receiving and sending mail are important activities
for an online merchant
Host the Web site
Technical and Managerial Support
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WHAT IS A DOMAIN NAME?
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Unique Internet address that represent a web site
Domain Name System (DNS)
Web server that stores registered domain names and
their numeric equivalents
 translates between IP address and URL
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All web access traffic and IP addresses operates at
TCP/IP layers
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Domain Name
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To send a message to another computer on the
internet the following steps are required
1.
2.
3.
4.
Sending PC has unique IP address in the form
xxx.xxx.xxx.xxx where each of xxx is between 0 and
255
TCP breaks the message into specific bits called
packets, each packet has the sender’s IP address
IP Packets are sent to their destination via router with
minimizing congestion
On the receiving end TCP check to make sure that all
packets are assembled correctly to present the message
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HOW A MESSAGE IS BEING
SENT?
IP=231.131.154.12
IP=112.134.54.51
Sending
PC
Packets
Router
Packets
Receiving
PC
To: 231.131.154.12
From:112.134.54.51
Figure: TCP/IP and Message Transmission
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Domain Name
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The company’s Web URL should be
easy to remember
 Present what the company is about
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How does a DOMAIN NAME
work?
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URL has 3 major part
http:// :- internet protocol and separator ://
 www. Name.xxx :- The domain name
 Subdirectory of the file /
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REGISTRATION
CONSIDERATIONS
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One or two close names
Unique product domain name
Ideal company domain name
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CYBER COMMANDMENTS OF
WEB SITE DOMAIN NAMES
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When choosing domain name, legal implication must be
consider
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Determine whether proposed domain name infringes any
trademarks
Determine whether proposed domain name dilutes any famous
marks
Obtain federal trademark registration of proposed domain
name
Register proposed domain name with InterNIC
Get permission before linking to other Web sites
Watch for expanded top-level domain names and registries
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PITFALLS FOR USING AN ISP
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Overcharging
Domain Name Status
Backup
Contractual Language
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FREQUENTLY ASKED
QUESTIONS
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What is involved in registering a domain name in
.com, .net or .org?
How long does a registration last? Can it be
renewed?
Can one change registrars after registering a
domain name?
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Application service Provider ( ASP)
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1.
2.
Consists of two unique service components
Website hosting and delivery
Application technical support : providing end-toend connectivity support
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Application service Provider ( ASP)
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Most features of ASP
1.
2.
3.
4.
Owns and operates a software application
Owns, operates, and maintains the servers that run
application
Employ the staff that to maintain the application
Makes the application available to customer everywhere
via internet
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Chapter 6
Internet Service Providers—
Hosting Your Web Site
45