Week 1: TCP/IP Model Flashcards
What are the 7 Layers in the OSI Model?
Application Presentation Session Transport Network Data Link Physical
True of False: The Layers in the TCP/IP Model exactly match those in the OSI Model
False, they do not exactly match
How many layers are in the TCP/IP Procotol Suite?
5
What are the 5 layers in the TCP/IP Protocol Suite?
Application Transport Network Data Link Physical
What can the data flow be described as at the Application Layer?
Process-to-Process
What can the data flow be described as at the Transport Layer?
Host-to-Host
What does data that is transmitted across a network to another device undergo?
Encapsulation
What are the 2 events that occur when data is encapsulated?
The data is wrapped with protocol information at each layer of the OSI Model
Each layer communicates only with its peer layer on the receiving device
Application Specific Addresses relate to which TCP/IP Model Layer?
Application
Port Numbers relate to which TCP/IP Model Layer?
Transport Layer (TCP & UDP)
IP Addresses relate to which TCP/IP Model Layer?
Network (IP & IPv6)
Physical Addresses (MAC Addresses) relate to which TCP/IP Model Layer?
Network Access & Physical (Network Access Protocols)
How many bits/bytes do most local-area networks use for the MAC Address?
48-bits (6 Bytes)
What does each device (computer or router) have for connection?
A Logical & Physical Address
How many bits are used to represent a Port Address?
16 bits
What properties of a PDU (Protocol Data Unit) change from hop to hop?
The Physical Address (MAC) will change from hop to hop
What properties of a PDU (Protocol Data Unit) will NOT change from hop to hop?
The Logical and Port Addresses usually remain the same
What is a Protocol Data Unity (PDU) composed of?
A Frame that contains a Packet which contains a Segment
What is a Segment composed of?
Source Port
Destination Port
Data
What is a Packet composed of?
Source IP
Destination IP
Protocol
Segment
what is a Frame composed of?
Destination MAC Source MAC Ether-Field Packet FCS
What is the PDU-related component that is made and Header that is attached at the Transport Layer?
Segment
TCP Header
What is the PDU-related component that is made and the Header that is attached at the Network Layer?
Packet
IP Header
What is the PDU-related component that is made and the Header that is attached at the Data Link Layer?
Frame
LLC Header & subsequent MAC Header
What is a PDU?
A Protocol Data Unit is encapsulated data with a Layer-respective header. Upper Layer PDU’s make the lower Layer’s data/payload
