Network Models Flashcards
What is the first layer of the OSI model and what does it deal with
Physical layer - Getting the ones and zeroes from one system to another , takes off the preamble and the frame checksum of the ethernet frame and then sends it off to the data link layer
What is the second layer of the OSI model and what does it deal with
Data link layer - Inspects ethernet frames to see if it is meant for that computer based off the mac address by looking at the destination mac address of the ethernet frame, if it is meant for that computer it takes off the destination and source mac address and saves it to send a frame back to the sender
What is the third layer of the OSI model and what does it deal with
Network layer - Takes a look at the incoming packets , looks at the ip addresses and makes sure the packet is going to the right places, strips off the destination and source ip addresses, keeps the source ip adddress to be able to send anything back to the sender
What is the fourth layer of the OSI model and what does it deal with
Transport layer - Assemble and disassemble data as they come in , then sends the rest up to the session layer
What is the fifth layer of the OSI model and what does it deal with
Session layer - Makes connection to the remote host , takes off the destination port and source ports of the ethernet frame
What is the sixth layer of the OSI model and what does it deal with
Presentation layer - makes sure data gets to where it needs to be and make sure that its data that the application can view
What is the third layer of the OSI model and what does it deal with
Application Layer - Allows api to understand the data coming
How many bites are in a frame
up to 1500 bytes
Where are frames created and consumed
within the NIC
What do the first three pairs of the MAC address represent
The OEM number
What do the last three pairs of the MAC address represent
The unique ID
What does a cyclic redundancy check do
checks to see if the data is good or not
What is the range of MAC addresses decimals and letters used to make a MAC address
0 - 9 and A - F
What the MAC address for a broadcast look like
All F’s - FF:FF:FF:FF:FF:FF
Where do ip packets sit in
Frames
