Question 1

What is Telnet and why is it useful?

Accepted Answer

Telnet, short for "Teletype Network," is a network protocol used to provide a command-line interface for communication with a remote device or server. It operates on the client-server model and uses a virtual terminal connection that allows a user to log in to a remote host and execute commands as if they were physically present at the terminal.

Telnet is useful for several reasons:

1. Remote Access: It allows users to remotely manage servers or other network devices from any location with an internet connection. This is particularly useful for system administrators who need to configure or troubleshoot remote systems without being physically present.

2. Simplicity: Telnet is a simple protocol that uses plain text for communication, making it easy to understand and use. It doesn't require complex setup or configuration, which can be advantageous in environments where simplicity is a priority.

3. Cross-platform Compatibility: Telnet clients are available for a wide range of operating systems, including Windows, macOS, Linux, and Unix. This makes it a versatile tool for accessing different types of systems.

4. Legacy Support: Many older network devices and systems still support Telnet, making it a necessary tool for interacting with legacy equipment that may not support more modern protocols.

However, it's important to note that Telnet has significant security weaknesses. It transmits data, including login credentials, in plain text without any form of encryption. This makes it susceptible to eavesdropping and man-in-the-middle attacks. As a result, Telnet has largely been replaced by Secure Shell (SSH) in most applications. SSH provides the same functionality as Telnet but with robust encryption, making it much more secure for remote communication.

In summary, while Telnet is useful for its simplicity and wide compatibility, its security flaws mean it should only be used in secure and controlled environments or replaced with more secure alternatives like SSH for remote access and management tasks.

Question 2

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

Accepted Answer

A) client 
B) server 
C) middleware 
D) hardware 
E) software 
A) client 
B) server 
C) middleware 
D) hardware 
E) software B

Question 3

The idea for a special hypertext network, called the World Wide Web, was conceived of by:

Accepted Answer

A) Microsoft in 1994 as part of the Windows 95 project 
B) Tim Berners-Lee at the European Laboratory for Particle Physics CERN) in 1989 
C) Vinton Cerf, for the U.S.Department of Defense in 1969 as a network of four computers called ARPANET 
D) Howard Flieshman of IBM in 1982 as part of the development of the IBM PC 
E) the University of Minnesota as an extension of Gopher 
A) Microsoft in 1994 as part of the Windows 95 project 
B) Tim Berners-Lee at the European Laboratory for Particle Physics CERN) in 1989 
C) Vinton Cerf, for the U.S.Department of Defense in 1969 as a network of four computers called ARPANET 
D) Howard Flieshman of IBM in 1982 as part of the development of the IBM PC 
E) the University of Minnesota as an extension of Gopher B

Question 4

Client-server architectures:

Accepted Answer

A) cannot connect computers that use different hardware 
B) are one of the least used network architectures today 
C) can use middleware to provide a standard way of communicating between software from more than one vendor 
D) assign the responsibility for the presentation logic to the server 
E) were the earliest type of network architectures 
A) cannot connect computers that use different hardware 
B) are one of the least used network architectures today 
C) can use middleware to provide a standard way of communicating between software from more than one vendor 
D) assign the responsibility for the presentation logic to the server 
E) were the earliest type of network architectures

Question 5

Suppose your organization was contemplating switching from a host-based architecture to client-server.What problems would you foresee?

Accepted Answer

Switching from a host-based architecture

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) session 
B) presentation 
C) data access 
D) data storage 
E) networking 
A) session 
B) presentation 
C) data access 
D) data storage 
E) networking

Question 8

The acronym, HTML, refers to:

Accepted Answer

A) Header Markup Language 
B) Hypertext Markup Locator 
C) Hypertext Markup Language 
D) Hypertext Markup Library 
E) Hypertext Modulating Language 
A) Header Markup Language 
B) Hypertext Markup Locator 
C) Hypertext Markup Language 
D) Hypertext Markup Library 
E) Hypertext Modulating Language

Question 9

A request header for an HTTP request starts with a command, such as GET, and ends with the HTTP version number that the browser understands.

Accepted Answer

A) True 
 B)False

Question 10

The ________________ cloud deployment model provides the highest levels of control, privacy and security.

Accepted Answer

A) private 
B) public 
C) community 
D) hybrid 
A) private 
B) public 
C) community 
D) hybrid

Question 11

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

Accepted Answer

A) browser 
B) application web 
C) web server 
D) operating system 
E) none of the above 
A) browser 
B) application web 
C) web server 
D) operating system 
E) none of the above

Question 12

A "thin client" approach places most of the application logic on the client.

Accepted Answer

A) True 
 B)False

Question 13

What is MIME? What does it stand for? Why was it developed?

Accepted Answer

MIME stands for Multipurpose Internet Ma

Question 14

IMAP Internet Message Access Protocol):

Accepted Answer

A) is a set of standards that define how email is to be processed between mail servers 
B) is exactly the same as SMTP 
C) copies an e-mail message from the client computer's hard disk, deletes it from the client, and stores it on the mail server 
D) is exactly the same as POP 
E) permits an e-mail message to remain stored on the mail server even after they have been read by a client computer 
A) is a set of standards that define how email is to be processed between mail servers 
B) is exactly the same as SMTP 
C) copies an e-mail message from the client computer's hard disk, deletes it from the client, and stores it on the mail server 
D) is exactly the same as POP 
E) permits an e-mail message to remain stored on the mail server even after they have been read by a client computer

Question 15

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

Accepted Answer

A) Mail transfer agent 
B) Mail user agent 
C) Microsoft Outlook 
D) Web server 
E) SMTP 
A) Mail transfer agent 
B) Mail user agent 
C) Microsoft Outlook 
D) Web server 
E) SMTP

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

In a host-based system with a mainframe, upgrades to the host are _____________.

Accepted Answer

A) Small 
B) Cheap 
C) Lumpy 
D) Never going to happen 
E) Always performed annually 
A) Small 
B) Cheap 
C) Lumpy 
D) Never going to happen 
E) Always performed annually

Question 18

A response status code of 404 means:

Accepted Answer

A) the requested page was not found 
B) the server is currently unavailable 
C) the sever is currently busy 
D) your browser is incompatible with the Web server software. 
E) your browser needs to be updated to the latest version. 
A) the requested page was not found 
B) the server is currently unavailable 
C) the sever is currently busy 
D) your browser is incompatible with the Web server software. 
E) your browser needs to be updated to the latest version.

Question 19

What do a user agent and message transfer agent do in an SMTP/IMAP email system? What are some examples of user agent packages?

Accepted Answer

In an SMTP/IMAP email system, a User Age

Question 20

In a ___________ architecture, computers are both client and server, thus sharing the work.

Accepted Answer

A) Host-based 
B) Client-based 
C) Client-server 
D) Peer-to-peer 
E) Network 
A) Host-based 
B) Client-based 
C) Client-server 
D) Peer-to-peer 
E) Network

What is Telnet and why is it useful?

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

The idea for a special hypertext network, called the World Wide Web, was conceived of by:

Client-server architectures:

Suppose your organization was contemplating switching from a host-based architecture to client-server.What problems would you foresee?

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

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

The acronym, HTML, refers to:

A request header for an HTTP request starts with a command, such as GET, and ends with the HTTP version number that the browser understands.

The ________________ cloud deployment model provides the highest levels of control, privacy and security.

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

A "thin client" approach places most of the application logic on the client.

What is MIME? What does it stand for? Why was it developed?

IMAP Internet Message Access Protocol):

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

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

In a host-based system with a mainframe, upgrades to the host are _____________.

A response status code of 404 means:

What do a user agent and message transfer agent do in an SMTP/IMAP email system? What are some examples of user agent packages?

In a ___________ architecture, computers are both client and server, thus sharing the work.

Introduction to Data Communications

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

Exam 2: Application Layer

What is Telnet and why is it useful?

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

The idea for a special hypertext network, called the World Wide Web, was conceived of by:

Client-server architectures:

Suppose your organization was contemplating switching from a host-based architecture to client-server.What problems would you foresee?

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

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

The acronym, HTML, refers to:

A request header for an HTTP request starts with a command, such as GET, and ends with the HTTP version number that the browser understands.

The ________________ cloud deployment model provides the highest levels of control, privacy and security.

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

A "thin client" approach places most of the application logic on the client.

What is MIME? What does it stand for? Why was it developed?

IMAP Internet Message Access Protocol):

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

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

In a host-based system with a mainframe, upgrades to the host are _____________.

A response status code of 404 means:

What do a user agent and message transfer agent do in an SMTP/IMAP email system? What are some examples of user agent packages?

In a ___________ architecture, computers are both client and server, thus sharing the work.

Introduction to Data Communications

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters