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Open Systems Interconnect (OSI) Model

Descrição

Understanding the Seven Layers of the OSI network model
sirhulk1
Quiz por sirhulk1, atualizado more than 1 year ago
sirhulk1
Criado por sirhulk1 quase 11 anos atrás
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Resumo de Recurso

Questão 1

Questão
What best describes the Open Systems Interconnection model (OSI) ?
Responda
  • A physical model that contains seven layers and provides different vendors to communicate on the network.
  • Its a conceptual model that characterizes and standardizes the internal functions of the a communication system by partitioning it into abstraction layers.

Questão 2

Questão
What is layer 1: Physical layer ?
Responda
  • Provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the physical layer.
  • Provides the functional and procedural means of transferring variables length data sequences from a source host on one network to a destination host on a different network.
  • Defines the electrical and physical specifications for devices.

Questão 3

Questão
What best describes the Data Link Layer?
Responda
  • Provides the functional and procedural means of transferring variables length data sequences from a source host on one network to a destination host on a different network. It routes packets through logical addressing.
  • Defines the electrical and physical specifications for devices.
  • Defines how data is formatted for transmission and how access to the network is controlled. Provides error detection but no flow control using sliding window.

Questão 4

Questão
What best describes the Network Layer?
Responda
  • It segments and reassembles data in to a data stream. Services in this layer segment and reassembles data from upper layer applications.
  • Provides the physical transmission of data and handles error notification, network topology, and flow control.
  • Manages device addressing, tracks the locations of devices in the network and determines the best way to move data through logical addressing.

Questão 5

Questão
What best describes the Transport Layer?
Responda
  • Manages device addressing, tracks the locations of devices in the network and determines the best way to move data through logical addressing.
  • Provides the physical transmission of data and handles error notification, network topology, and flow control.
  • It segments and reassembles data in to a data stream. Services in this layer segment and reassembles data from upper layer applications.

Questão 6

Questão
What best describes the Session Layer?
Responda
  • Provides the physical transmission of data and handles error notification, network topology, and flow control.
  • Defines the electrical and physical specifications for devices.
  • Defined as a translator and provides coding and conversion functions. Presents data to the Application layer and is responsible for data translation and code formatting.

Questão 7

Questão
What best describes the Session Layer?
Responda
  • Manages device addressing, tracks the locations of devices in the network and determines the best way to move data through logical addressing.
  • Its responsible for setting up, managing and tearing down sessions between Presentation Layer entities.
  • It segments and reassembles data in to a data stream. Services in this layer segment and reassembles data from upper layer applications.

Questão 8

Questão
What are examples of the Physical Layer?
Responda
  • IPv4 and IPv6 used in logical addressing
  • Hubs and Repeaters. Also transmission media such as copper and fiber.
  • Hardware addressing, flow control and error notification.

Questão 9

Questão
What are examples of Data Link Layer?
Responda
  • Physical addressing, Network topology, Flow control and Error notification.
  • TCP and UDP
  • IPv4 and IPv6
  • FIle, print, messages, database and application services

Questão 10

Questão
What are examples of Network Layer?
Responda
  • Hubs and Repeaters
  • IPv4 and IPv6
  • TCP and UDP

Questão 11

Questão
What are examples of the Transport Layer? (Pick Two)
Responda
  • Routing using IPv4 and IPv6
  • Dialog control and sessions.
  • Establishes sessions and tearing down virtual circuit.
  • Data encryption, compression, and translation services.
  • UDP and TCP.

Questão 12

Questão
What are examples of the Session Layer? (Pick two)
Responda
  • Data encryption, compression, and translation services.
  • Physical topology
  • Keeps applications data separate from other applications data.
  • File, print, message and database.
  • dialog control, simplex mode, half duplex mode, and full duplex mode.

Questão 13

Questão
What are examples of the Application Layer? (Pick Two)
Responda
  • TCP and UDP
  • Physical Topologies
  • Telnet, HTTP, Email, SSH, DNS, FTP, SMTP and LDAP, and SNMP.
  • DHCP

Questão 14

Questão
The Data Link Layer provides _____________ transmission of data and handles ____________ notification.
Responda
  • 1) fast 2) network
  • 1) physical 2) error
  • 1) access control 2) error

Questão 15

Questão
What is the Media Access Control (MAC) IEEE 802.3 ?
Responda
  • It is a sublayer of the Data Link layer that is responsible for physical addressing. It defines how packets are placed on the media. Its called media access since it acts as a first come first service access.
  • It is a sublayer of the Data Link layer that is responsible for identifying network layer protocols and encapsulating them. Its header tells the data link layer what to do with the packet once a frame is received.

Questão 16

Questão
What is the Logical Link Control (LLC) IEEE 802.2 ?
Responda
  • It is a sublayer of the Data Link layer that is responsible for identifying network layer protocols and encapsulating them. Its header tells the data link layer what to do with the packet once a frame is received.
  • It is a sublayer of the Data Link layer that is responsible for physical addressing. It defines how packets are placed on the media. Its called media access since it acts as a first come first service access.

Questão 17

Questão
MAC address is a _____ bit ___________ address
Responda
  • 48 bit hexadecimal address
  • 64 bit hexadecimal address
  • 128 bit hexadecimal address

Questão 18

Questão
In a 48 bit MAC address, what represents the first 24 bits and what represents the remaining 24 bits?
Responda
  • The first 24 bits is the unique serial number and the second 24 bits represent the OUI
  • The first 24 bits is the customer number and the second 24 bits represent the unique serial number
  • The first 24 bits is the vendor (Organizational Unique Identifier) and the second 24 bits represent the unique serial number.

Questão 19

Questão
What is Ethernet?
Responda
  • Its a topology that allows network access for data transmission in the network
  • It is a contention media access method that allows all users on the network to share the same bandwidth.

Questão 20

Questão
Ethernet is a popular technology since its scalable as its easy to integrate new technologies. It uses both the data link layer and physical layer specifications.
Responda
  • True
  • False

Questão 21

Questão
What is a unicast?
Responda
  • It communicates with the LAN as a one to many hosts.
  • It communicates with the LAN as a one to one host.
  • it communicates with the LAN as a one to certain hosts
  • It communicates with the LAN as a one to nearest host

Questão 22

Questão
What is multicast?
Responda
  • It communicates with the LAN as a one to many hosts.
  • It communicates with the LAN as a one to one host.
  • it communicates with the LAN as a one to certain hosts
  • It communicates with the LAN as a one to nearest host

Questão 23

Questão
What is Broadcast?
Responda
  • It communicates with the LAN as a one to many hosts.
  • It communicates with the LAN as a one to one host.
  • it communicates with the LAN as a one to certain hosts
  • It communicates with the LAN as a one to nearest host

Questão 24

Questão
What is an anycast?
Responda
  • It communicates with the LAN as a one to one host.
  • It communicates with the LAN as a one to many hosts.
  • It communicates with the LAN as a one to nearest host
  • it communicates with the LAN as a one to certain hosts

Questão 25

Questão
What is the IEEE 802.11 standard used for?
Responda
  • Its used for the physical layer as an enhanced Ethernet transmission access method.
  • Its used for implementing wireless local area network (WLAN).

Questão 26

Questão
IEEE 802.3 standard has 6 bytes for both Source and Destination addresses and 1 byte for both Destination Service Access Point (DSAP) and Source Service Access Point (SSAP).
Responda
  • True
  • False

Questão 27

Questão
The Ethernet_II frame does not have the DSAP nor the SSAP field but instead has a two byte "Type Field" which is roughly equivalent to the DSAP field of 802.3 frame which relates to the network layer information.
Responda
  • True
  • False

Questão 28

Questão
Half duplex operates in a shared collision domain and Full duplex operates in a private collision domain.
Responda
  • True
  • False

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