A Norton Internet Security Warning

1
A Norton Internet Security Warning

• My computer showed me this pop-up this morning
• As we discussed last time, UoO assigns public IP
  addresses. A hacker was scanning my computers
  ports, hoping for a response
• If my computer responds on some channel, then
  that communication might lead to the hacker
  finding a security flaw

2
Reminder re team projects

• Team presentations will begin at the end of our
  Week 9, which means next Wed.
• Approx. 7 teams will present that Wed.
• Approx. 7 teams will present the following Mon.
• I will post the presentation schedule online
  tomorrow morning.
• If you want to be within the first set of teams
  (those presenting Wednesday), send me email
  before tomorrow morning.
• Reminder from project handout To keep each team
  at 10min total, the actual presentation time
  should be 6-8 minutes, thus providing a few
  minutes of switching time between teams.
• Weight 10 total, 4 based on presentation
• Remaining 6 breakdown
• 2 on model sophistication
• 2 on accompanying explanatory document
  (.doc/.pdf file)
• 2 on clarity of spreadsheet work (labels,
  comments, organization, professional appearance)

3
Getting your Business Online

• DSC 340, Week 8

4
Basic Steps to Discuss

• Business Modeling
• Choosing a domain name
• Buying the name
• Designing a website
• Hosting your site
• Spreading the word

5
1. Business Modeling

• Internet business are still businesses
• The traditional cost/revenue/profit
  considerations of business do apply!
• We have seen many examples of the kinds of things
  that happen when you forget this
• Demand, revenues, and costs can be difficult to
  predict, so build this uncertainty into your
  business model

6
1. Business Modeling

• Critical concept Eprofit(x,y,z) is not usually
  not equal to profit(Ex,Ey,Ez).
• So, using your expected demand, expected revenue,
  and expected costs as inputs to your business
  model is not good enough.
• This is one reason why stochastic simulations are
  so valuable.

7
2. Choosing a domain name

• Consider making your companys website name
• extensible
• e.g., what does Amazon.com have to do with books?
• memorable
• short
• The extension matters!
• Country Code Domains (.uk, .de, .jp, .us, etc.)
• Generic Domains (.aero, .asia, .biz, .cat, .com,
  .coop, .edu, .gov, .info, .jobs, .mobi, .int,
  .mil, .museum, .name, .net, .org, .pro, .tel and
  .travel)
• the marketplace has spoken - .com considered
  the best
• You might also choose misspellings of the name,
  or other variations
• Amazon.com might purchase AmazonSucks.com

8
2. Choosing a domain name

• Generally people advise avoiding
• Trademarks
• Hyphens
• Numbers
• One may not be enough
• Multiple markets may imply multiple names/sites
• Choose/register the name(s) sooner rather than
  later
• Its a global market for the same set of, e.g.,
  dot-com, names

9
3. Buying the name

• Buying a domain name is referred to as
  registering the domain
• Its actually a lease, not a purchase
• You register the domain via a company called a
  domain name registrar
• Lease timeframe ranges from 1 year to 99 years
• Price per year ranges from 5 to 20
• Research the registrar before you choose
• avoid being scammed

10
3. Buying the name

• Largest registrars by -registered-names (06
  data)

11
3. Buying the name

• Current lessee has the option to renew name
  before end of lease
• And, most good names are already being leased!
• How do you check if a name is available?
• Any registrars site will have search option
• How do you check details of lessee?
• WHOIS search
• Lessee can pay for private registration, in which
  case you wont see their details

12
3. Buying the name

• Options for buying names that are not available
• Everything has a price
• Option 1 direct-contact deal
• use WHOIS search to make direct contact, then
  negotiate a deal
• Option 2 domain name marketplace
• Several varieties auction style, fixed-price
  style, make-an-offer style. Sometime you will
  find the same domain name on several marketplaces
• Example of marketplaces buydomains.com
  afterNIC.com

13
4. Designing a website

• Your companys site should not be a collection of
  .html (web) pages
• .html files are called static web pages
• .html mixes content and display information, and
  is therefore .html files hard to update
  automatically
• manual updates are too costly!
• imagine if Amazon.com used only static pages

14
4. Designing a website
Browser
Browser
Browser
Web Server
Enterprise datain Databases
Disconnect!
Static Pages
A static website
15
4. Designing a website

• Your corporate site should be dynamic (not
  static), based on n-tier design principles

User makes web request
Web Server
DBMS
Dynamic page is returned to user
Service creates HTML document from live data

• Web pages created on the fly to include data
  dynamically, and are thus always up to date.

16
4. Designing a website

• How does a Web Server connect to the database
  server?
• Using special plug-in software for the web-server
• Many options for such plug-in software
• IBMs WebSphere
• Oracles Oracle Application Server
• Macromedias Cold Fusion
• Microsofts .NET
• The plug-in is sometimes called application
  server software or middleware.

17
4. Designing a website
Page request
Application ServerMiddleware
Web Server
Dynamically generated HTML page
Database Networking Software
Database Networking Software
Storeddata
Database Server
18
4. Designing a website

• To help in the development and maintenance of
  very complicated websites, companies now split
  their website code (the middleware tier) into
  multiple parts
• Presentation code that deals with how to display
  of information to users
• Business Logic handles execution of business
  logic
• Data Access defines and provides data, initiates
  retrievals-from and updates-to the DBMS
• This modern approach is referred to as n-tier
  architecture

19
4. Designing a websiten-tier Architecture
Back-end Systems Layer
Presentation Layer
Business Logic Layer
Data Access Layer
Database
Processinfo.
Show info.
Store/retrieveinfo.
HTTP (Internet)
Legacy Systems
Directory Services (LDAP)
Application Server
Value-Added Services
Web Browser Client
Application tier now split into 3 layers
Content Management
Personalization
Commerce
20
4. Designing a website Benefits of n-tier
Architecture

• Ability to upgrade and enhance application layers
  independently.
• Greater reusability of software.
• Ability to integrate new applications without
  modifying existing code.
• Greater security.
• The disadvantage is obvious it takes more
  expertise to set up

21
5. Hosting your site

• Many vendors want your business
• Important considerations besides price BSDCCC
• Bandwidth allowance per month?
• Security
• Dependability (24/7/365 with 99.999 uptime?)
• Capacity (how many Giga or Tera bytes of files
  can you store on your site?)
• Capability
• Do they support languages, database servers, and
  application servers that your website development
  team will need?
• Convenience (administrative interface)

22
5. Hosting your site

• You dont always get what you pay for
• Some hosting sites are not cheap yet deliver poor
  results
• Some relatively inexpensive hosting services have
  good reputations
• hostmonster.com (Linux servers)
• discountASP.net (Windows servers)

23
5. Hosting your site

• What you can get for 6/month in early 07

24
6. Spreading the word

• Unless you actively advertise the existence of
  your site, there is a good chance that you will
  be the only visitor your site ever gets. 
• Website ads
• Related-keywords search-engine ads (e.g., Google)
• Banner ads on related sites (e.g., Double Click)
• Getting your site search-engine indexed
• Takes a while to get a high ranking
• A sites Google Page Rank is of great
  importance, because that determines how high up
  in Googles long list of results your site will
  fall

25
6. Spreading the word

• Google.com Page Rank (PR)
• PR relies on the uniquely democratic nature of
  the web by using its vast link structure as an
  indicator of an individual page's value. In
  essence, Google interprets a link from page A to
  page B as a vote, by page A, for page B.
• But, Google looks at more than the sheer volume
  of votes, or links a page receives it also
  analyzes the page that casts the vote. Votes cast
  by pages that are themselves "important" weigh
  more heavily and help to make other pages
  "important."
• Source http//www.google.com/technology/index.htm
  l