Networks Chp 7

What are problems that can occur at the network layer

-Incorrect IP addresses or subnet masks -Incorrect router configuration -Router operation errors

The maximum amount of TCP data that we can send in a normal Ethernet frame is ___________ bytes.

1,460

The number of layers in ISO OSI reference model is ______

7

What is the Open Systems Interconnection (OSI) model

A model used to define how data communication occurs on computer networks. This model is divided into layers, each of which provides services to the layers above and below. These layers are associated with protocols and devices.

What is the acronym to remember the 7 layered model for the OSI model

All People Seem to Need Data Processing or Please Do Not Throw Sausage Pizza Away

Provides access to network resources Application Presentation Session Transport

Application

Provides programs with access to network services

Application

SMTP, FTP, Telnet are examples of which layer?

Application

Place the following letters in the correct order to represent the OSI model from Layer 7 to Layer 1: a. Presentation b. Data Link c. Session d. Physical e. Application f. Transport g. Network

Application Presentation Session Transport Network Data Link Physical

What are the 7 layers of the model

Application Presentation Session Transport Network Data Link Physical

provides physical device addressing device-to device delivery of frames, media access control and MAC addresses, switches

Data Link

This layer is the intermediary between the Network layer and the Physical layer

Data Link layer

What is peer communication between layers?

Each layer on one computer behaves as though it were communicating with the same layer on the other computer

802.3 Ethernet Wifi Token Ring

Ethernet

What does IEEE stand for?

Institute of Electrical and Electronics Engineers

Which OSI layer governs how a NIC is attached to the network medium? a. Application b. Physical c. Transport d. Data Link

b. Physical

Which layer is used to link the network support layers and user support layers? a) session layer b) data link layer c) transport layer d) network layer

c) transport layer

Which OSI layer determines the route a packet takes from sender to receiver? a. 7 b. 1 c. 3 d. 4

c. 3

Which of the following problems can occur at the Physical layer? a. NIC driver problems b. Incorrect IP addresses c. Signal errors caused by noise d. Incorrect segment size

c. Signal errors caused by noise

Data is divided into data units called _______________

protocol data units

802.5 ethernet wifi Token ring

token ring

Ensures reliable delivery of data, breaks data into segments, handles sequencing and acknowledgements and provides flow control

transport establish a logical end to end connection between two systems in a network.

802.11 Ethernet wifi tokent ring

wifi

Fragmentation is commonly seen as having a negative impact on overall communication efficiency T/F

T

In the OSI model, Each layer provides services to the next higher layer until the data reaches the Application layer. T/F

T

Which two protocols operate at the transport layer of the TCP/IP model? (Choose two.) FTP ICMP TCP IP UDP

TCP UDP

What model is used instead?

TCP/IP model

What is the Project 802

The Institute of Electrical and Electronics Engineers (IEEE) defined LAN standards to ensure that network interfaces and cabling from multiple manufacturers would be compatible. Project 802 to indicate the year (1980) and the month (Feb) of its inception

What reference model divides network communications into seven distinct layers and is used to maintain equipment and application interoperability between different vendors? DoD IEEE 802.3 OSI TIA

OSI

Which address is used to identify a process on a host by the transport layer? a) physical address b) logical address c) port address d) specific address

c) port address

handles packet routing, logical addressing and access control IP address, Routers

network

Establishes, maintains and coordinates communication between applications

Session

Manages ongoing conversations between two computers Application Presentation Session Transport

Session

This layer is responsible for establishing and terminating of connections between devices.

Session

Which OSI layer handles flow control, data segmentation, and reliability? a. Application b. Physical c. Transport d. Data Link

c. Transport

Which IEEE 802 standard applies to Ethernet? a. 802.2 7 b. 802.3 c. 802.4 d. 802.5 e. 802.11

b. 802.3

Defines how computers access the media Physical Data Link Transport Network

Data Link

Which OSI layer creates and processes frames?

Data Link

The size of the PDU that you'll transmit will be determined by the _________

MTU, or the maximum transmission unit. This will determine the maximum size of an IP fragment to send across the network without having to fragment that data along the way.

The IEEE 802.2 standard specifies a Logical Link Control (LLC) and_____________

Media Access Control (MAC) sublayer

Provides best path selection and IP addressing Physical Data Link Transport Network

Network

What layer do routers operate at?

Network Layer

Do we actually use the OSI Model?

No but it is used as a reference

A a unit of information that is sent by a protocol at a particular OSI layer.

PDU- Protocol Data Unit

Cable, Network interface cards, hubs Network Physical Session Application

Physical

Converts bits into signals and defines media and connectors Physical Data Link Transport Network

Physical

This layer converts bits into signals for outgoing messages and signals into bits for incoming messages

Physical

Manages hardware connections handles sending and receiving binary signals and handles encoding of bits

Physical Lowest layer

Handles data formatting and translation Application Presentation Session Transport

Presentation

Handles data representation to application and data conversions, ensures that data can be read by the receiving system and handles encryption and decryption

Presentation

This layer is also able to encrypt and decrypt data if needed. Format data

Presentation

Which layer is responsible for process to process delivery in a general network model? a) network layer b) transport layer c) session layer d) data link layer

b) transport layer

Breaks long data streams into smaller chunks (segments) Application Presentation Session Transport

Transport

TCP, UDP, Port numbers

Transport

Which layer provides the services to user? a) application layer b) session layer c) presentation layer d) physical layer

a) application layer

TCP/IP model was developed _____ the OSI model .a) prior to b) after c) simultaneous to d) with no link to

a) prior to

TCP/IP model does not have ______ layer but OSI model have this layer. a) session layer b) transport layer c) application layer d) network layer

a) session layer The functions of Presentation and Session layer in the OSI model are handled by the transport layer itself in TCP/IP.

Which term refers to stripping header information as a PDU is passed from one layer to a higher layer? a. Deencapsulation b. Encapsulation c. PDU stripping d. Packetization

a. Deencapsulation

At which Data Link sublayer does the physical address reside? a. Media Access Control (MAC) b. Logical Link Control (LLC) c. Data Access Control (DAC) d. Network Access Control (NAC)

a. Media Access Control (MAC)

OSI stands for __________ a) open system interconnection b) operating system interface c) optical service implementation d) open service Internet

a. Open Systems Interconnection

Which of the following elements might the Data Link layer add to its PDU? (Choose all that apply.) a. Physical addresses b. Logical addresses c. Data d. CRC

a. Physical addresses d. CRC

At each layer, software reads its PDU data and strips its header information this is called

deencapsulation

Which IEEE 802 standard applies to wireless LANs? a. 802.2 b. 802.3 c. 802.4 d. 802.5 e. 802.11

e. 802.11

Some layers add their own formatting to the PDU, which is called a ____________

header encapsulation