OSI AND TCP(IP) MODELS
QUESTIONS & ACCURATE ANSWERS
RATED 100% CORRECT
OSI model
Application (Layer 7) - Correct Answer ✔✔ The Application layer integrates network
functionality into the host operating system, and enables network services. The
Application layer does not include specific applications that provide services, but rather
provides the capability for services to operate on the network.
Most Application layer protocols operate at multiple layers down to the Session and
even Transport layers. However, they are classified as Application layer protocols
because they start at the Application layer (the Application layer is the highest layer
where they operate). Services typically associated with the Application layer include:
• HTTP
• Telnet
• FTP
• TFTP
• SNMP
OSI model
Presentation (Layer 6) - Correct Answer ✔✔ The Presentation layer formats or
"presents" data into a compatible form for receipt by the Application layer or the
destination system, such as the presentation of an ASCII-coded file. Specifically, the
Presentation layer ensures:
• Formatting and translation of data between systems.
• Negotiation of data transfer syntax between systems, through converting character
sets to the correct format.
• Encapsulation of data into message envelopes by encryption and compression.
• Restoration of data by decryption and decompression.
OSI model
Session (Layer 5) - Correct Answer ✔✔ The Session layer's primary function is
managing the sessions in which data is transferred. Functions at this layer include:
• Management of multiple sessions (each client connection is called a session). A server
can concurrently maintain thousands of sessions.
• Assignment of the session ID number to each session to keep data streams separate.
• Set up, maintain, and tear down communication sessions.
OSI model
Transport (Layer 4) - Correct Answer ✔✔ The Transport layer provides a transition
between the upper and lower layers of the OSI model, making the upper and lower
layers transparent from each other. Transport layer functions include:
• End-to-end flow control.
QUESTIONS & ACCURATE ANSWERS
RATED 100% CORRECT
OSI model
Application (Layer 7) - Correct Answer ✔✔ The Application layer integrates network
functionality into the host operating system, and enables network services. The
Application layer does not include specific applications that provide services, but rather
provides the capability for services to operate on the network.
Most Application layer protocols operate at multiple layers down to the Session and
even Transport layers. However, they are classified as Application layer protocols
because they start at the Application layer (the Application layer is the highest layer
where they operate). Services typically associated with the Application layer include:
• HTTP
• Telnet
• FTP
• TFTP
• SNMP
OSI model
Presentation (Layer 6) - Correct Answer ✔✔ The Presentation layer formats or
"presents" data into a compatible form for receipt by the Application layer or the
destination system, such as the presentation of an ASCII-coded file. Specifically, the
Presentation layer ensures:
• Formatting and translation of data between systems.
• Negotiation of data transfer syntax between systems, through converting character
sets to the correct format.
• Encapsulation of data into message envelopes by encryption and compression.
• Restoration of data by decryption and decompression.
OSI model
Session (Layer 5) - Correct Answer ✔✔ The Session layer's primary function is
managing the sessions in which data is transferred. Functions at this layer include:
• Management of multiple sessions (each client connection is called a session). A server
can concurrently maintain thousands of sessions.
• Assignment of the session ID number to each session to keep data streams separate.
• Set up, maintain, and tear down communication sessions.
OSI model
Transport (Layer 4) - Correct Answer ✔✔ The Transport layer provides a transition
between the upper and lower layers of the OSI model, making the upper and lower
layers transparent from each other. Transport layer functions include:
• End-to-end flow control.
