OSI Model
What layer of the OSI model is the Network layer? (e.g fifth layer, fourth layer)
The network layer is the third layer of the OSI model.
What is the purpose of Data Encapsulation?
To restrict the direct access to some components of an object, so users cannot access state values for all of the variables of a particular set of data. Places an encryption on the data.
What is the purpose of the router?
Transforms messages into packets and transfers the data across the internet.
What is Packet Traveling?
How data gets from sender to receiver.
How does the network layer distinguish where to send the data it receives?
The network layer looks at the sender's IP address in order to find the data's destination.
What does data encapsulation do?
Compiles all data into an individual unit
What are network cables responsible for?
Transmits data with signals.
What is the purpose of the ICMP?
Reports errors to the sending device.
What is the network layer ultimately responsible for?
Receiving and sending packets to their intended destinations.
What is the purpose of data decapsulation?
Works opposite to regular capsulation, allowing the intended receiver to view the information.
What are switches responsible for?
Channels data from input devices to output devices.
What is the purpose of the IP Protocol?
Identifies every device connected to the internet.
What is the function called where the network sends data to a router?
Routing
What does data decapsulation do to the data itself?
Works in the opposite way to data encapsulation, decrypting the data so that the intended recipient can read it.
How does the ICMP layer work with routers?
Helps the routers figure out the shape of the internet and what direction to send packets using different protocols.
How does the IP Protocol work?
Acquires IP Information needed for packet transportation, allowing computers to communicate with one another.
How does the network layer pick and choose which router to send data to? (What system does it use to figure this out?)
The network layer uses protocols to determine the best router.
What is one difference between data encapsulation and data decapsulation?
Both are complete opposites, with encapsulation grouping the data together, and decapsulation breaking the data apart.
What specific kinds of devices do switches work with?
Output devices like printers, screens, and speakers.
How does the ICMP layer work?
Creates and sends messages to the source of the IP address if a gateway to the internet, such as a router, service or host, cannot be reached.