1 - TCP/IP and OSI Models Flashcards
TCP/IP stands for ___.
transmission control protocol/internet protocol.
___ is a set of protocols used to connect network devices to each other. Made up of four layers.
TCP/IP
4th layer of TCP/IP
Application
TCP/IP: This layer is responsible for the communication protocols between nodes.
Application
Note: The protocols in this layer include hypertext transfer protocol (HTTP and HTTPS), Secure Shell (SSH), and network time protocol (NTP), among many others.
The 3rd layer of TCP/IP
Transport
TCP/IP: This layer is responsible for the end-to-end transport of data.
transport
Note: The protocols that live in this layer are transmission control protocol (TCP) and user datagram protocol (UDP)
TCP/IP: 2nd layer
Network
TCP/IP: This layer defines the logical transmission protocols for the whole network.
network
Note: The main protocols that live in this layer are internet protocol (IP), internet control message protocol (ICMP), and address resolution protocol (ARP).
TCP/IP: 1st layer.
Network Interface
TCP/IP: This layer establishes how data should be physically sent through the network.
network interface
The ___ model consists of a seven-layer architecture that organizes the sending of data from hosts across a network.
Open System Interconnection (OSI)
Note: The OSI model was developed by the International Standards Organization (ISO) after the TCP/IP model to provide greater granularity of networking assignments within the model.
OSI: 1st layer
Physical
OSI: This layer is responsible for the physical connections of the devices in the network.
Physical
Note: This layer is implemented through the use of devices such as hubs, repeaters, modem devices, and physical cabling.
OSI: 2nd layer
Data Link
OSI: This layer is responsible for the error-free delivery of data to the receiving device or node.
data link
Note: This layer is implemented through the use of devices such as switches and bridge devices, as well as anything with a network interface, like wireless or wired network cards.
OSI: 3rd layer
Network
OSI: This layer is responsible for the transmission of data between hosts in different networks as well as routing of data packets.
network
Note: This layer is implemented through the use of devices such as routers and some switches.
OSI: layer 4
transport
OSI: This layer provides services to the application layer and receives services from the network layer.
transport
Note: It is responsible for the reliable delivery of data. It segments and reassembles data in the correct order for it to be sent to the receiving device. It may also handle the reliable delivery of data and any retries of data that are lost or corrupted. This layer is often called the heart of OSI.
OSI: layer 5
session
OSI: This layer is responsible for connection establishment, session maintenance, and authentication.
session
OSI: layer 6
presentation
OSI: This layer is responsible for translating data from the application layer into the format required to transmit the data over the network as well as encrypting the data for security if encryption is used.
presentation
OSI: layer 7
application
OSI: This layer is responsible for network applications and their production of data to be transferred over the network.
application
Which TCP/IP layer performs addressing and routing?
a) Presentation
b) Transport
c) Application
d) Network
d) Network
Which layer of the OSI model does a bridge use to make decisions about forwarding data packets?
a) Physical
b) Network
c) Data Link
d) Transport
c) Data Link
Which layer of the OSI model establishes, manages, and terminates connections?
a) Session
b) Presentation
c) Application
d) Network
a) Session
