Topic #8: Applications: The Interface Between the Networks

Question 1

This layer of the OSI model provides the first step of getting data onto the network

Answer 1

Application Layer

Question 2

These are the software programs used by people to communicate over the network.

Answer 2

Application Software

Question 3

OSI Encapsulation Process

Answer 3

• People Create the Communication
• Application layer prepares communication for transmission
• Software and Hardware convert communication to a digital format
• Application layer services initiate the data transfer
• Each layer plays it role (Layer 7 - 1)
• It passes through the network (Layer 1 - 7)
• Application layer receives data and prepares it for human use

Question 4

Three Functions of the Presentation Layer of the OSI Model

Answer 4

• Coding and conversion of application layer data from source device
• Compression of data
• Encryption of data

Question 5

Function of the Session Layer in the OSI Model

Answer 5

• Create and maintain dialog between source and destination
• Exchange of information to initiate dialogs and keep them active and to restart sessions that are disrupted or idle

Question 6

TCP/IP Application Layer Protocols

Answer 6

Domain Name System
Hypertext Transfer Protocol
Simple Mail Transfer Protocol
Telnet
File Transfer Protocol

Question 7

This is a TCP/IP Application Layer Protocol that is used to resolve Internet Names to IP Addresses

Answer 7

Domain Name System

Question 8

This is a TCP/IP Application Layer Protocol that is used to transfer files that make up the webpages of the World Wide Web

Answer 8

Hypertext Transfer Protocol

Question 9

This is a TCP/IP Application Layer Protocol that is used for transfer of mail messages and attachments

Answer 9

Simple Mail Transfer Protocol

Question 10

This is a TCP/IP Application Layer Protocol that is used to provide remote access to servers and networking devices

Answer 10

Telnet

Question 11

This is a TCP/IP Application Layer Protocol that is used for interactive file transfer between systems

Answer 11

File Transfer Protocol

Question 12

These are individual software programs running concurrently

Answer 12

Software Processes

Question 13

Software Processes rank

Answer 13

Applications
Services
System Operations

Question 14

These are Application layer software that provide human user interface and rely on lower layers to complete the communication process; they are able to communicate directly to them.

Answer 14

Network-Aware Applications

Question 15

These Application Layer Software establish an interface to the network where protocols provide the rules and formats that govern how data is treated

Answer 15

Application Layer Services

Question 16

What is the most popular network service?

Answer 16

Email

Question 17

Application Layer Protocol Functions

Answer 17

• Establish consistent rules for data exchange
• Specify how data inside the message is structured and the type of messages sent
• define message dialogues and ensure that message being sent is met with expected response