4. Do some research to answer these questions:
Why did GM favor 802.4 over 802.3? Why did most of the world end up choosing 802.3?
7.8 The HTTP protocol is essentially a protocol providing for file transfer between the server and the
client. Therefore, the HTTP protocol is said to be ???stateless;??? i.e., the server receives a request, and the
server satisfies the request with a file transfer, regardless of what has happened before with this client.
This statelessness has been a challenge to those developing applications to be delivered over the web.
For instance, a banking application will need to keep track of the account number of the individual
making inquiries, even though the individual makes repeated inquiries and updates using several different
screens (web pages). How is application state maintained in such applications?
138 NETWORKING [CHAP. 7
CHAPTER 8
Database
THE UBIQUITOUS DATABASE
Today databases are ubiquitous. Almost every application we encounter has a database foundation. When
we buy something on-line, when we renew our driver??™s license, when we inquire about a flight schedule, when
we look up the sports scores, we are using applications that rely on databases. Databases provide efficiency,
security and flexibility of data storage, and are employed in applications ranging from library card catalogs to
machine automation in factories.
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