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
