Cisco CCNA 200-301
TCP/IP Stack =NETWORK ACCESS - ✔️✔️Controls the hardware devices and media
that make up the network (OSI comparison =Data-link, Physical)
TCP/IP Suite - ✔️✔️Transmission Control Protocol/ Internet Protocol.
Originally designed for use on large internetworks but has now become the de facto
protocol for networks of all sizes.
OSI (Open System Interconnect) Model - ✔️✔️A conceptual model to data
transmission at each individual layer. How networks talk to each other
OSI layers - ✔️✔️Sender(Encapsulation) -> Receiver (De-encapsulation)
7.)Application
6.)Presentation
5.)Session
4.)Transport (TCP/UDP, PORT)
3.)Network (IP address, operates with routers)
2.)Data-Link (Ethernet MAC address, operates with switch)
1.)Physical (operates with Hubs)
OSI acronyms - ✔️✔️Please Do Not Throw Sausage Pizza Away
Physical
Data-link
Network
Transport
Session
Presentation
Application
TCP/IP stack - ✔️✔️-Application
-Transport
-Internet
-Network Access
TCP/IP Stack =APPLICATION - ✔️✔️Represents Data users, encodes and controls
the dialog (OSI comparison =Application, Presentation, Session)
TCP/IP St Network Characteristics - ✔️✔️Topoplogy
Speed
, Cost
Security
Availability
Scalability
Reliability
ack =TRANSPORT - ✔️✔️Supports communication between end devices across a
divers network(OSI comparison =Transport)
TCP/IP Stack =INTERNET - ✔️✔️Provides logical addressing and determines the best
path through the network(OSI comparison =Network)
Protocol Data Unit (PDU) - ✔️✔️A generic term referring to the header defined by
some layer of a networking model, and the data encapsulated by the header (and
possibly trailer) of that layer, but specifically not including any lower-layer headers and
trailers.
Application Layer - ✔️✔️-Provides network services to the applications of the user
-does not provide services to any other OSI layer
-establishes the avialability of intended communication partners
-Synchronizes and establishes agreement on procedures for error recovery and control
of data integrity
Presentation Layer - ✔️✔️The sixth layer of the OSI model. Protocols in the
Presentation layer translate between the application and the network. Here, data are
formatted in a schema that the network can understand, with the format varying
according to the type of network used. The Presentation layer also manages data
encryption and decryption, such as the scrambling of system passwords.
Session Layer - ✔️✔️The fifth layer in the OSI model. This layer establishes and
maintains communication between two nodes on the network. It can be considered the
"traffic cop" for network communications.
Transport Layer - ✔️✔️The fourth layer of the OSI model. In this layer protocols ensure
that data are transferred from point A to point B reliably and without errors. this layer
services include flow control, acknowledgment, error correction, segmentation,
reassembly, and sequencing. Decides whether TCP or UDP is used, and the port
number
The Network Layer - ✔️✔️The third layer in the OSI model. Provides connectivity and
path selection between two host systems that may be located on geographically
separated networks. Manages connectivity of host by providing logical addressing
TCP/IP Stack =NETWORK ACCESS - ✔️✔️Controls the hardware devices and media
that make up the network (OSI comparison =Data-link, Physical)
TCP/IP Suite - ✔️✔️Transmission Control Protocol/ Internet Protocol.
Originally designed for use on large internetworks but has now become the de facto
protocol for networks of all sizes.
OSI (Open System Interconnect) Model - ✔️✔️A conceptual model to data
transmission at each individual layer. How networks talk to each other
OSI layers - ✔️✔️Sender(Encapsulation) -> Receiver (De-encapsulation)
7.)Application
6.)Presentation
5.)Session
4.)Transport (TCP/UDP, PORT)
3.)Network (IP address, operates with routers)
2.)Data-Link (Ethernet MAC address, operates with switch)
1.)Physical (operates with Hubs)
OSI acronyms - ✔️✔️Please Do Not Throw Sausage Pizza Away
Physical
Data-link
Network
Transport
Session
Presentation
Application
TCP/IP stack - ✔️✔️-Application
-Transport
-Internet
-Network Access
TCP/IP Stack =APPLICATION - ✔️✔️Represents Data users, encodes and controls
the dialog (OSI comparison =Application, Presentation, Session)
TCP/IP St Network Characteristics - ✔️✔️Topoplogy
Speed
, Cost
Security
Availability
Scalability
Reliability
ack =TRANSPORT - ✔️✔️Supports communication between end devices across a
divers network(OSI comparison =Transport)
TCP/IP Stack =INTERNET - ✔️✔️Provides logical addressing and determines the best
path through the network(OSI comparison =Network)
Protocol Data Unit (PDU) - ✔️✔️A generic term referring to the header defined by
some layer of a networking model, and the data encapsulated by the header (and
possibly trailer) of that layer, but specifically not including any lower-layer headers and
trailers.
Application Layer - ✔️✔️-Provides network services to the applications of the user
-does not provide services to any other OSI layer
-establishes the avialability of intended communication partners
-Synchronizes and establishes agreement on procedures for error recovery and control
of data integrity
Presentation Layer - ✔️✔️The sixth layer of the OSI model. Protocols in the
Presentation layer translate between the application and the network. Here, data are
formatted in a schema that the network can understand, with the format varying
according to the type of network used. The Presentation layer also manages data
encryption and decryption, such as the scrambling of system passwords.
Session Layer - ✔️✔️The fifth layer in the OSI model. This layer establishes and
maintains communication between two nodes on the network. It can be considered the
"traffic cop" for network communications.
Transport Layer - ✔️✔️The fourth layer of the OSI model. In this layer protocols ensure
that data are transferred from point A to point B reliably and without errors. this layer
services include flow control, acknowledgment, error correction, segmentation,
reassembly, and sequencing. Decides whether TCP or UDP is used, and the port
number
The Network Layer - ✔️✔️The third layer in the OSI model. Provides connectivity and
path selection between two host systems that may be located on geographically
separated networks. Manages connectivity of host by providing logical addressing
