As application data is passed down the protocol stack on its way to be transmitted across the network media, various protocol information is added at each level. This is known as the encapsulation process. The form that a piece of data takes at any layer is called a protocol data unit (PDU).
What is a PDU called at the layer 7 the Application layer?
A) Data
What is a PDU called at the layer 6 the Presentation layer?
C) Data
What is a PDU called at the layer 5 the Session layer?
C) Data
What is a PDU called at the layer 4 the Transport layer?
A) Segment
What is a PDU called at the layer 3 the Network layer?
C) Packet
What is a PDU called at the layer 2 the Data Link layer?
A) Frame
What is a PDU called at the layer 1 the Physical layer?
A) Bits
What is the IOS Model from the top-down?
A) Application, Presentation, Session, Tranport, Network, Data Link, Pysical
What is the IOS Model from the down-up?
A) Pysical, Data Link, Network, Tranport, Session, Presentation, Application
The Open Systems Interconnection (OSI) model consists of:
A) 7 layers
Physical layer of the OSI model is also referred to as:
A) Layer 1
Which of the following protocols reside(s) at the application layer of the OSI model? (Select all that apply)
a. HTTP
b. FTP
c. SMTP
d. NetBIOS
e. ARP
HTTP, FTP, SMTP
Which of the following terms refers to the OSI network layer?
C) Layer 3
Layer 6 of the OSI model is also known as:
D) Presentation layer
In the OSI model, physical addressing takes place at the:
D) Data link layer
OSI layer 7 is also referred to as:
D) Application layer
Which of the following reside(s) at the physical layer of the OSI model? (Select all that apply)
a. Router
b. Hub
c. Switch
d. Network cabling
e. Bridge
Hub and Network cabling
In the OSI model, data compression takes place at the:
C) Presentation layer
Which OSI layer assumes responsibility for managing network connections between applications?
A) Session layer
Layer 4 of the OSI model is also known as:
B) Transport layer
Presentation layer is another term for:
C) Layer 6 of the OSI model
What is the name of a data unit used at the OSI physical layer?
D) Bit
In the OSI model, Media Access Control (MAC) and Logical Link Control (LLC) sublayers are the components of:
D) Data link layer
Layer 2 of the OSI model is also known as:
A) Data link layer
User Datagram Protocol (UDP) resides at: (Select 2 answers)
a. Transport layer
b. Layer 3
c. Layer 4
d. Network layer
e. Layer 6
f. Data link layer
Transport layer and Layer 4
Which OSI layer is responsible for breaking up data into segments?
B) Transport layer
Transport layer resides between which two other layers of the OSI model?
B) Network and Session
Routers operate at: (Select two answers)
a. Physical layer of the OSI model
b. Application layer of the OSI model
c. Layer 3 of the OSI model
d. Network layer of the OSI model
e. Layer 5 of the OSI model
Layer 3 of the OSI model
and
Network layer of the OSI model
Layer 5 of the OSI model is called:
B) Session layer
In the OSI model, session layer is also known as:
C) Layer 5
At which of the OSI layers IP addressing takes place?
B) Layer 3
Layer 3 of the OSI model is also referred to as:
A) Network layer
Data encryption and decryption typically takes place at the:
C) Presentation layer of the OSI model
Application layer of the OSI model is known as:
C) Layer 7
Which of the following devices resides at the data link layer of the OSI model?
C) Ethernet switch
In the OSI model, Transmission Control Protocol (TCP) resides at: (Select all that apply)
a. Transport layer
b. Layer 3
c. Application layer
d. Layer 4
e. Network layer
f. Layer 7
Transport layer and Layer 4
Which of following protocols reside(s) at the OSI network layer? (Select all that apply)
a. IPv4
b. UDP
c. IPsec
d. TCP
e. IPv6
f. ICMP
IPv4, IPsec, IPv6, and ICMP
Which of the protocols listed below resides at the session layer of the OSI model?
