40 Questions
What is the purpose of using models in data communications?
To simplify explanation when the real object is too complex to visualize
Which model is a model of the functionality required to communicate from the source end user to the destination end user?
International Organization for Standardization Open Systems Interconnection model
Why is it important to understand the OSI model in data communications?
It is crucial to understanding data communications
What does the mail analogy represent in relation to the OSI model?
The similarity to end-user-to-end-user communications
In the mail analogy, what does 'the original sender' represent?
Source end user
What is the critical question addressed regarding the letter in the mail analogy?
How did the sending user know that the letter was received?
What does the OSI model describe and generally specify?
The order of functions in transmission
What is true about using models in data communications?
'Models simplify explanation when objects are simple to visualize'
'Modeling' is used for what purpose?
'To simplify explanation'
'What do models represent?' According to the text, models represent:
'Objects that cannot be physically captured'
What type of application model dictates how communications and networking software applications are applied?
User Services
Which type of system supplies the organization, as well as the boundaries, procedures, and rules?
Business Services
In control systems, what approach is mentioned as a better method for exchanging data?
Publisher-Subscriber approach
What does the publisher-subscriber method allow a client application to communicate with a server for?
All of the above
Which model refers to a stand-alone PC running a check balancing program?
One-tier model
What are the majority of databases of any size managed by?
Relational database management systems
In the OSI model, which layer provides the mechanical and electrical means of connecting to the medium?
Physical Layer
Which layer of the OSI model is responsible for reliable end-user-to-end-user communications?
Transport Layer
What is the primary function of the Session layer in the OSI model?
Virtual connection establishment
Which model defines data communications in only five layers, in contrast to the OSI model?
Internet Model
What does the Network layer ensure in the sending end's protocol header?
Proper IP address format
Which standard divides the OSI Data Link layer into two distinct sublayers: Media Access Control and Logical Link Control?
IEEE 802 Model
What does the Presentation layer ensure about communications data?
Correct syntax for applications layer
What does the Application layer do in the OSI model?
User interface and output
Which protocol is not OSI compliant but provides Layer 4 functionality?
TCP
What is IEEE 802.3 standard related to?
Ethernet
The Internet Protocol and Internet Packet Exchange are associated with which layer?
Network Layer
What is the role of User Datagram Protocol (UDP) SAPs?
Addresses assigned by controlling program
Which layer of the OSI model is responsible for reliable end-user-to-end-user communications?
Transport layer
What is the primary function of the Network layer in the OSI model?
Performing end-user routing
Which protocol is commonly used for connection-oriented communication at Layer 4 of the OSI model?
Transmission Control Protocol (TCP)
What is the main responsibility of the Presentation layer in the OSI model?
Ensuring correct data syntax
In the OSI model, where does the line of demarcation between data communications and data processing exist?
Between Transport and Session layers
Which model defines data communications in only five layers, in contrast to the OSI model?
The Internet model
What is the main focus of Layer 3 in the OSI model?
Routing functions
What does the IEEE 802 standard specifically define for different standard networks?
Media Access Control and Logical Link Control sublayers
Which standard network type is defined by IEEE 802.3?
Carrier Sense Multiple Access with Collision Detection network
Which protocol is commonly used at Layer 3 of the TCP/IP suite?
Internet Protocol (IP)
What is one of the main concerns of the Session layer in the OSI model?
Virtual connection establishment and release
In the OSI model, what does the Physical layer provide?
Line termination and/or impedance matching
Learn about the purpose of communication models and how they simplify explanations in data communications. Explore the International Organization for Standardization Open Systems Interconnection (ISO OSI) model and its functionality for communication.
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