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
What is Encapsulation
The entire process of preparing data to go onto the a network
What is De-encapsulation
The reverse process of encapsulation
Layers of TCP/IP Model
Layer 4: Application
Layer3: Transport
Layer 2: Internet
Layer 1: Link
What is in the IP Link Layer compared to OSI Model
Physical and Data Link
What is the Internet Layer compared to OSI Model
Network
What is the Transport Layer compared to OSI Model
Transport
What is the Application layer compared to OSI Model
Session, Presentation and Application
