TCP/IP Flashcards
Define protocols
The set of rules that computing devices follow in order to communicate.
What is a layer protocol stack?
A set of protocols that interact with one another, but are not concerned with how each other works.
What is TCP/IP?
A layered protocol stack that enables communication on the internet.
What is each layer in a stack responsible for?
A particular part of the process.
How does each layer in a stack interact?
The produce a result that is used by the next layer, being passed lower or higher.
Can layers be skipped?
No
What devices in the transmission use the layers?
Both the sending device and the receiving device use all layers of the stack.
What are the layers called and what is the order of the layers in a stack?
Application layer –> Transport layer –> Internet layer –> link layer
(Then the receiving device does the same but in reverse.)
What is the application layer responsible for?
It contains protocols that are responsible for how user applications, such as email and web browsers, package their data to be sent online.
What does the transport layer do?
The protocols in the transport layer establish a channel between the two devices and split the data into packets.
What happens in the internet layer (or network layer)?
Addressing is carried out. The addresses of the sending and receiving devices are added to the packet header.
What happens in the link layer (or network interface layer)?
It is responsible for transporting the raw data over the transmission medium. This includes generating the right type of signal for the connection type- light for fibre, electrical for ethernet, etc
What happens at the receiving computer when using TCP/IP?
1) the signal is translated into data
2) the addresses are taken of
3) the packets are reconstructed
4) the data is rendered for the application
What one bit of information enables each device to communicate?
The fact that each device connected to a network must use the same communication protocols. AKA “the same language”.
