Chapter 2: Application Layer

To get a page from the web, a user must type in a URL, which stands for:

Uniform Resource Locator

Client Server architectures:

Can use middleware to provide a standard way of communicating between software from more than one vendor

True or False : Host-based and client based networks are similar in that the client computer performs most of the work:

False

True or False :The application architecture called the distributed computing model uses the "thick" client approach.

False

True or False: A "thin client" approach places most of the application logic on the client:

False

True or False: As the demand for more and more network applications grow; host-based computing becomes the best solution.

False

True or False: The earliest data communications networks were client server network:

False

True or False: The simple mail transfer protocol is the least commonly used e-mail standard

False

True or False: Using the POP standard for client to server e-mail communication, the e-mail messages remain on the server computer.

False

A N- tiered Architecture:

Is generally more "scalable" than a three-tiered architecture.

Which of the following is not an example of a mail user agent software package?

Microsoft Word

In a client server network, ____ gets software from different vendors to work together.

Middleware

In the three tier architecture, the software on the client computer is responsible for the :

Presentation Logic

The ______ cloud deployment model provides the highest levels of control, privacy and security:

Private

True or False :Your typical web browsing scenario where a person using a web browser accesses a web page from a server on the Internet is a good example of a client-server application architecture.

True

True or False: Scalability refers to the ability to increase or decrease the capacity of the computing infrastructure in response to changing capacity needs.

True

True or False: The four general functions of any application program are: data storage, data access logic, application logic and presentation logic.

True

The Standards H320, H323, and MPEG-2 are commonly used with:

Videoconferencing

A 'thin client' architecture approach:

places all or almost all of the application logic on the server

The most commonly used email standard is :

Simple Mail Transport

The fundamental problem in client- based networks is that all data on the server must travel to the client for processing

True

True or False :In a client-server network, the presentation logic is responsibility of the client computer

True

In a two tier client server architecture, a client computer needs to use an application layer software package called a ______ to send email:

mail user agent

The two functions of middleware are to :

1) Provide a standard way of communicating that can translate between software from different vendors. 2) Manage the message transfer between clients and servers so that clients do not need to know which server contained the application's data.

With a client-based network, one fundamental problem is that:

All data in the server must travel to the client for processing.

A(n)______ is the way in which the functions of the application layer software are spread among the clients and servers in the network:

Application Arch

_______, or algorithms or business logic programmed into the application, can be simple or complex depending on the application

Application Logic

Which is not a general function by any application program?

Application access storage.

_______ is not an important middleware standard.

Asynchronous Transfer Mode (ATM)

What technique is used by most videoconferencing application to reduce the amount of data being transmitted:

Compression

With the two-tier client-server architecture, the client is responsible for the ________ logic.

Data Access

HTML stands for:

Hypertext Markup Language

The protocol that makes it possible for macintosh web browser to be able to retrieve a web page from a Microsoft web server is called the _______ :

Hypertext Transfer Protocol

With ______________, the cloud provider manages the hardware including servers, storage, and networking components. The organization is responsible for all the software, including operating system (and virtualization software), database software, and its applications and data.

Iaas

The software that runs on the mail server is referred to as the ____:

Mail transfer agent

A _____ is a very large general-purpose computer that is capable of performing very many functions as if these are done simultaneously, and strong extremely large amounts of data

Mainframe

A "thick client" architecture approach:

Places all or almost all of the application logic on the client.

There are optional and required parts of an HTTP request. They are:

Request line, request header, request body

With the "thin client" architecture, when an application changes, only the _________ with the application logic needs to be updated.

Server

A _____ is a group of computers linked together so that they appear to act as one computer:

Server Farm

What is not true about telnet?

Telnet poses no security threat.

How are the application architecture functions split up in a client-server network?

The presentation logic on the client, while the data storage and data access logic are on the server.

A response status code of 404 means:

The requested page was not found.

One underlying problem with a host-based network is that:

The server can get overload since it must process all messages

Each server on a network that needs to act as a web server needs an application layer software package called a (n) ______________.

Web Server

To interact with the World Wide Web, a client computer needs an application layer software package called a:

Web broswer

________ is a special type of one directional; videoconferencing is which content is sent from the server to the user.

Webcasting

Another term for a mail user agent is:

email client

One disadvantage of the ____ architecture is the places a greater load on the network:

n-tier