Network Models Flashcards
OSI 7 Layer network Model (List Each Layer)
Layer 7: Application Layer6: Presentation Layer 5: Session Layer 4: Transport Layer 3: Network Layer 2: Data Link Layer 1: Physical
UTP Wire
Unshielded twisted pair containing 4 wires
OSI Model Layer 1
The method of moving data between computers. These include cabling/central box.
Mac Addresses and how they are broken up
First 6 digits identify the Manufacturer
Last 6 Digits Identify the Machine
FCS
Frame Check Sequence - FCS uses a type of Binary math call a cyclic Redudency Check (CRC) to verify data arrived in tact.
How much data do typical frames hold in a network
1500 bytes
What do switches filter traffic by
Mac Address
How do hubs filter information
They don’t, they just repeat it to every computer attached
OSI Model Layer 2
Any device that deals with a MAC address, including switches and NICs. LLC and MAC.
LLC
Logical Link Control - The aspect of the NIC that talks to the systems operating system.
OSI Model Layer 3
IP Addressing including routers
OSI Model Layer 4
Transport layer, that does segmentation and reassembly of packets in correct order
OSI Model Layer 5
Session Layer - Handles opening, maintaining and closing all sessions on a computer.
OSI Model Layer 6
Presentation Layer - Translates data from lower layers into a format usable by application layer and vice versa.
OSI Model Layer 7
Software applications that read the data and present it in a readable format
