154 terms

Seven Layer OSI model

STUDY
PLAY
Provides a user interface.
Application Layer (7)
Presents data
Handles processing such as encryption
Presentation Layer (6)
Keeps different applications' data separate
Session Layer (5)
Provides reliable or unreliable delivery
Performs error correction before retransmit
Transport Layer (4)
Provides logical addressing, which routers use for path determination
Network Layer (3)
Combines packets into bytes and bytes into frames
Provides access to media using MAC address
Performs error detection not correction
Data Link Layer (2)
Moves bits between devices
Specifies voltage, wire speed, and pinout of cables
Physical Layer (1)
File, print, database, & application services.
Application Layer (7)
Data encryption, compression & translation services.
Presentation Layer (6)
Dialog control
Session Layer (5)
End-to-end connection
Transport Layer (4)
Routing
Network Layer (3)
Framing
Data Link Layer (2)
Physical topology
Physical Layer (1)
True/False: The three upper layers of the OSI communicate with the user interface and application.
True
True/False: The middle layers (4 & 3) do communication and routing to remote networks
True
True/False: The bottom layers communicate to all layers of the OSI
False
True/False: The bottom layers communicate to the local network
True
FTP control port 21
Application Layer (7)
Keyword: Syntax, Encryption, Compression
Presentation Layer (6)
Keyword: Communication
Session Layer (5)
Port Numbers
Transport Layer (4)
ICMP
Network Layer (3)
Keyword: MAC, LLC
Data Link Layer (2)
Repeater
Physical Layer (1)
Client Software
Application Layer (7)
SMTP port 25
Application Layer (7)
Telnet port 23
Application Layer (7)
HTTPS- HTTP over SSL/TLS port 443
Application Layer (7)
File Transfers
Application Layer (7)
SSH port 22
Application Layer (7)
Layer where identification and confirmation of the communications partner's availability and verification of the required resources to permit the specified type of communication to take place
Application Layer (7)
Layer where users communicate to the computer and comes into play only when it's clear that access to the network will be needed soon
Application Layer (7)
Layer for Enabling Remote Access
Application Layer (7)
Layer for Client/Server Processes
Application Layer (7)
Layer for Email
Application Layer (7)
OSI Layer for Information Location
Application Layer (7)
Layer where the interface between the actual application program and the next layer down by providing ways for the application to send information down through the protocol stack
Application Layer (7)
Layer for Decompression/Decryption
Presentation Layer (6)
Layer for Network Management Activities
Application Layer (7)
Application (Upper Layer) - Provides user interface
Layer (7)
Presentation (Upper Layer) - Presents data; Handles processing such as encryption
Layer (6)
Session (Upper Layer) - Keeps different applications' data separate
Layer (5)
Transport (Lower Layer) - Provides reliable or unreliable delivery; Performs error correction before retransmit
Layer (4)
Network (Lower Layer) - Provides logical addressing, which routers use for path determination
Layer (3)
Data Link (Lower Layer) - Combines packets into bytes and bytes into frames; Provides access to media using MAC address; Performs error detection not correction
Layer (2)
Physical (Lower Layer) - Moves bits between devices; Specifies voltage, wire speed, and pinout of cables
Layer (1)
Network Management Stations (NMS's) operate at what level of the OSI model
All Seven Layers of the OSI Model
Web and Application Servers operate at what level of the OSI model
All Seven Layers of the OSI Model
Gateways (Not Default Gateways) operate at what level of the OSI model
All Seven Layers of the OSI Model
Servers operate at what level of the OSI model
All Seven Layers of the OSI Model
Network Hosts operate at what level of the OSI model
All Seven Layers of the OSI Model
It divides the network communication process into smaller components, facilitating component development, design, and troubleshooting
A benefit of using the OSI Layered Model
It allows multiple-vendor development through network component standardization
A benefit of using the OSI Layered Model
It encourages industry standardization by clearly defining what functions occur at each layer
A benefit of using the OSI Layered Model
It allows various types of network hardware and software to communicate
A benefit of using the OSI Layered Model
It prevents changes in one layer from affecting other layers to expedite development
A benefit of using the OSI Layered Model
Data Encryption, Compression, and Translation Services are at which OSI Layer Functions
Presentation Layer (6)
OSI Layer that presents data to the Application Layer and is responsible for data translation and code formatting
Presentation Layer (6)
OSI Layer that serves as OSI Model's translator, providing coding and conversion services
Presentation Layer (6)
Layer that ensures that data transferred from the Application Layer of one system can be read by the Application Layer of another
Presentation Layer (6)
Layer for Compression
Presentation Layer (6)
Layer for Encryption
Presentation Layer (6)
Layer for Decryption
Presentation Layer (6)
Multimedia Operations Are at what layer of the OSI
Presentation Layer (6)
Dialog Control is at which OSI Layer Functions
Session Layer (5)
Layer that is Responsible for setting up, managing, and dismantling sessions between Presentation Layer entities and keeping user data separate
Session Layer (5)
Layer for Dialogue control between devices
Session Layer (5)
Layer that Coordinates and organizes communication between hosts' various applications, as from a client to a server, via three different modes: Simplex, Half-Duplex, and Full-Duplex
Session Layer (5)
Simplex: one-way communication
Session Layer (5)
Half-Duplex:
Two-way communication
- Can take place in only one direction at a time, preventing the interruption of the transmitting device
Session Layer (5)
Full-Duplex
- Two-way communication
- Devices can transmit and receive at the same time
Session Layer (5)
End-to-End Connection are at which OSI Layer Functions
Transport Layer (4)
Segments and reassembles data into a single data stream
Transport Layer (4)
Services take all the various data received from upper-layer applications, combine it into the same concise data stream
Transport Layer (4)
Protocols provide end-to-end data transport services and can establish a logical connection between the sending host an destination host on an internetwork
Transport Layer (4)
TCP and UDP are integral protocols
Transport Layer (4)
Layer that is Responsible for providing mechanisms for multiplexing upper-layer applications, establishing sessions, and tearing down virtual circuits
Transport Layer (4)
Layer that Can also hide details of network-dependent information from the higher layers as well as provide transparent data transfer
Transport Layer (4)
Layer that Can be either be connectionless or connection-oriented
Transport Layer (4)
Which OSI Layer Can be either be connectionless or connection-oriented
Transport Layer (4)
Which OSI Layer segments and reassembles data into a single data stream
Transport Layer (4)
Which OSI Layer has the Services take all the various data received from upper-layer applications, combine it into the same concise data stream
Transport Layer (4)
Which OSI Layer has Protocols provide end-to-end data transport services and can establish a logical connection between the sending host an destination host on an internetwork
Transport Layer (4)
Which OSI Layer has TCP and UDP are integral protocols
Transport Layer (4)
Which OSI Layer is Responsible for providing mechanisms for multiplexing upper-layer applications, establishing sessions, and tearing down virtual circuits
Transport Layer (4)
Which OSI Layer Can also hide details of network-dependent information from the higher layers as well as provide transparent data transfer
Transport Layer (4)
What Layer of the OSI does a Buffer operate?
Transport Layer (4)
Level of the OSI where windowing occurs
Transport Layer (4)
Segments
Transport Layer (4)
Session Multiplexing happend on which layer of the OSI
Transport Layer (4)
Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?
Transport Layer (4)
Routing is which OSI Layer Functions
Network Layer (3)
What Layer of the OSI Manages logical device addressing, tracks the location of devices on the network, and determines the best way to move data
Network Layer (3)
What Layer of the OSI Transports traffic between devices that aren't locally attached
Network Layer (3)
IP addresses are added on ____ layer of the OSI
Network Layer (3)
Routers are specified at this layer, and provide the routing services within an internetwork
Network Layer (3)
Which layer of the OSI model is responsible for creating packets?
Network Layer (3)
OSI Layer that manages logical device addressing, tracks the location of devices on the network, and determines the best way to move data
Network Layer (3)
OSI Layer that transports traffic between devices that aren't locally attached
Network Layer (3)
Routers are specified at this OSI layer, and provide the routing services within an internetwork
Network Layer (3)
What layer of the OSI model do routers operate?
Network Layer (3)
Switches work at what layer of the OSI.
Data Link Layer (2)
Framing is at which OSI Layer Functions
Data Link Layer (2)
OSI Layer? Provides for the physical transmission of data and handles error notification, network topology, and flow control
Data Link Layer (2)
OSI Layer? Will ensure that messages are delivered to the proper device on a LAN using hardware addresses and will translate messages from the Network Layer into bits for the Physical Layer
Data Link Layer (2)
OSI Layer? Formats the message and adds a customized header containing the hardware destination and the source address; the added information forms a sort of capsule that surrounds the original message
Data Link Layer (2)
OSI Layer? Responsible for the actual unique identification of each device that resides on a local network
Data Link Layer (2)
Uses hardware addressing to allow a host to send packets to individual hosts on a local network as well as transmit packets between routers
Data Link Layer (2)
OSI Layer? Uses Ethernet and IEEE standards
Data Link Layer (2)
OSI Layer? Frames a packet with control information each time it is sent between routers, but the information is stripped off at the receiving router and only the original packet is left completely intact
Data Link Layer (2)
OSI Layer? Packet framing continues at each hop until the packet is finally delivered to the correct receiving host
Data Link Layer (2)
OSI Layer? The packet itself is never altered along the route, it's only encapsulated with the type of control information required for it to be properly passed on to the different media types
Data Link Layer (2)
True/False: As data is encoded with control information at each layer of the OSI model, the data is named with something called a Protocol Data Unit (PDU): At the Transport layer the PDU is called a Segment, Network layer is Packet, Data Link is Frame, and Physical layer is Bits
True
A host receives a frame and computes the checksum, and determines that the frame is damaged. The frame is discarded. At what layer of the OSI model did this happen?
Data Link Layer (2)
Physical Topology is at which OSI Layer Functions
Physical Layer (1)
Level of the OSI where Bits are found
Physical Layer (1)
Does two things: it sends bits and receives bits; Bits come only in values of 1 or 0—a Morse code with numerical values
Physical Layer (1)
Communicates directly with the various types of actual communication media
Physical Layer (1)
Different kinds of media represent bit values in different ways; Some use audio tones, while others employ state transitions—changes in voltage from high to low and low to high
Physical Layer (1)
Specific protocols are needed for each type of media to describe the proper bit patterns to be used, how data is encoded into media signals, and the various qualities of the physical media's attachment interface
Physical Layer (1)
Specifies the electrical, mechanical, procedural, and functional requirements for activating, maintaining, and deactivating a physical link between end systems
Physical Layer (1)
Identifies the interface between the data terminal
equipment (DTE) and the data communication equipment (DCE); The DCE is usually located at the service provider, while the DTE is the attached device
Physical Layer (1)
The services available to the DTE are most often accessed via a modem or channel service unit/data service unit (CSU/DSU)
Physical Layer (1)
Layer responsible for taking 1s and 0s and encoding them into a digital signal for transmission on the network segmen
Physical Layer (1)
DATA Layers
Application Layer (7)
Presentation Layer (6)
Session Layer (5)
NTP port 123
Application Layer (7)
DHCP port 67 (BOOTPS)
Application Layer (7)
HTTP port 80
Application Layer (7)
SMNP port 161
Application Layer (7)
Starts, maintains and ends communication sessions between applications
Session Layer (5)
FTP control port 20 data
Application Layer (7)
ASCII & EBCDIC
Presentation Layer (6)
Delivery & Formatting
Presentation Layer (6)
TCP/UDP
Transport Layer (4)
ACK/NACK
Transport Layer (4)
Windowing
Transport Layer (4)
Sequencing
Transport Layer (4)
IP
Network Layer (3)
IPX
Network Layer (3)
RIP
Network Layer (3)
EIGRP
Network Layer (3)
OSPF
Network Layer (3)
Logical topology
Network Layer (3)
SCTP-Multi-Streming
Transport Layer (4)
MAC addresses
Data Link Layer (2)
Switches/Bridges
Data Link Layer (2)
PPP/Frame-Relay/Wireless (IEEE)
Data Link Layer (2)
Frames
Data Link Layer (2)
Bits
Physical Layer (1)
Voltage/Cabling/HUBS/Amplifiers/Repeaters/WAN wireless
Physical Layer (1)
Segmentation of a data stream happens at which layer of the OSI model?
Transport Layer (4)
MAC addresses are the feature of _____________ layer.
Data Link Layer (2)
Which OSI Reference Model layer provides logical addressing, path determination and forwarding?
Network Layer (3)
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