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02a. OSI and TCP/IP Models
CompTIA Network+ OSI and TCP/IP Network Models
48
Computer Networking
Professional
03/06/2012
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Term
OSI stands for the ___ ___ ___ reference model.
 Definition
Open Systems Interconnect
Term
The OSI model was created by the ___ ___ ___
 Definition
International Organization for Standardization (ISO)
Term
True or false? The OSI model was developed before the TCP/IP model.
 Definition
False
Term
The mnemonic device for remembering the 7 layers of the OSI model from Bottom to Top is _____
 Definition
Please Do Not Throw Sausage Pizza Away
Term
Layer 1 of the OSI model identifies the network’s ____ characteristics.
 Definition
physical
Term
The hardware specifications of OSI layer 1 describes the type of ___ used on the network.
 Definition
media
Term
___  describes the shape or layout of the network.
 Definition
Topology
Term
The _____ layer defines the voltage used on a given medium and the frequency at which the signals that carry the data operate.
 Definition
physical (1)
Term
The _____ layer is responsible for getting data to the physical layer so that it can transmit over the network.
 Definition
data link (2)
Term
The data link (2) layer has two distinct sublayers: _____ and _____.
 Definition
MAC
LLC
Term
The ___ ___ ___ sublayer of Layer 2 is included in the IEEE 802.1 standard.
 Definition
Media Access Control (MAC)
Term
The ___ ___ ___ sublayer of Layer 2 is specified in the IEEE 802.2 standard.
 Definition
Logical Link Control (LLC)
Term
The ___ ___ ___ sublayer of Layer 2 is responsible for error and flow-control mechanisms of the data link layer.
 Definition
Logical Link Control (LLC)
Term
The primary responsibility of the _____ layer is routing (providing mechanisms by which data can be passed from one network system to another).
 Definition
network (3)
Term
The _____ layer does not specify how the data is passed, but rather provides the mechanisms to do so.
 Definition
network (3)
Term
Functionality at the network layer is provided through ___ protocols, which are software components.
 Definition
routing
Term
Determining the best path for the data to take through the network is called _____ _____.
 Definition
route selection
Term
Protocols at the _____ layer are responsible for route selection
 Definition
network (3)
Term
The data link layer uses ____ addresses to communicate on the LAN. The network layer uses _____-configured addresses and ___ protocols.
 Definition
MAC
software
routing
Term
A group of data at the network layer (3) is called a ___.
 Definition
packet
Term
In a _____ routing environment, routes are manually added to the routing tables.
 Definition
static
Term
In a _____routing environment, routing protocols such as Routing Information Protocol (RIP)and Open Shortest Path First (OSPF) are used. These protocols communicate routing information between networked devices on the network.
 Definition
dynamic
Term
The basic function of the _____ layer is to provide mechanisms to transport data between network devices.
 Definition
transport (4)
Term
Error checking, Service Addressing, and Segmentation all occur at the _____ layer.
 Definition
transport (4)
Term
The process of breaking blocks of data into packets of a manageable size for the lower layers to handle is called _____.
 Definition
segmentation
Term
Protocols that operate at the transport layer (4) can either be connectionless, such as _____, or connection-oriented, such as _____.
 Definition
User Datagram Protocol (UDP)
Transmission Control Protocol (TCP)
Term
The transport layer (4) is responsible for data _____ ______, which refers to how the receiving device can accept data transmissions.
 Definition
flow control
Term
The transport layer (4) uses ______ and _____ for flow control.
 Definition
buffering
windowing
Term
When _____ is used for flow control, data is temporarily stored and waits for the destination device to become available. This can cause a problem if the sending device transmits data much faster than the receiving device can manage.
 Definition
buffering
Term
When _____ is used for flow control, data is sent in groups of segments that require only one acknowledgment. The number of segments in one acknowledgment is defined when the session is established.
 Definition
windowing
Term
Using Windowing for flow control greatly reduces ______.
 Definition
overhead
Term
The ___ layer is responsible for managing and controlling the synchronization of data between applications on two devices.
 Definition
session
Term
While the transport layer (4) is responsible for setting up and maintaining the connection between the two nodes, the _____ layer performs the same function on behalf of the application.
 Definition
session
Term
The _____ layer’s basic function is to convert the data intended for or received from the application layer into another format.
 Definition
presentation (6)
Term
The presentation layer (6) is responsible for data ____ and _____.
 Definition
encryption
decryption
Term
The function of the _____ layer is to take requests and data from users and pass them to the lower layers of the OSI model.
 Definition
application (7)
Term
Some of the most basic application-layer services include _____ and _____ capabilities
 Definition
file
print
Term
The TCP/IP network model has only _____ layers.
 Definition
four
Term
The ___ layer of the TCP/IP network model corresponds to the top 3 layers of the OSI model.
 Definition
application
Term
The _____ layer of the TCP/IP network model corresponds to the transport layer of the OSI model.
 Definition
transport
Term
The _____ layer of the TCP/IP network model corresponds to the network layer of the OSI model.
 Definition
internet
Term
The ___ ___ layer of the TCP/IP network model corresponds to the bottom 2 layers of the OSI model.
 Definition
Network Interface
Term
Hubs operate at the _____ layer of the OSI model.
 Definition
Physical (1)
Term
Bridges operate at the _____ layer of the OSI model.
 Definition
Data Link (2)
Term
Switches operate at the _____ and _____ layers of the OSI model.
 Definition
Data Link (2)
Network (3)
Term
Routers operate at the _____ layer of the OSI model.
 Definition
Network (3)
Term
NICs operate at the _____ layer of the OSI model.
 Definition
Data Link (2)
Term
Access Points operate at the _____ layer of the OSI model.
 Definition
Data Link (2)
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