Chapter 4 (Networking Protocols & Routing) Flashcards
What is TCP/IP?
A suite of protocols, or standards
What are some examples of TCP/IP?
TCP. IPv4, IPv6, UDP & ARP
Define Payload
Payloads are data and instructions, generated by an application running on the source host
At what layer are payloads created?
Layers 7, 6, & 5
What are the seven layers of of the OSI Model?
Application, Presentation, Session, Transport, Network, Data Link, & Physical
What is included in the header on Layer 4?
Includes a port number
What is the purpose of the port number from the header on Layer 4?
To identify the receiving application on the destination host
What does the entire “message” become when using TCP?
Segment
What does the entire “message” become when using UDP
Datagram
What is Layer 3?
The Network Layer
What is Layer 4?
The Transport Layer
What is Layer 5?
The Session Layer
What is Layer 6?
The Presentation Layer
What is Layer 2?
The Data Link Layer
What is Layer 1?
The Physical Layer
What does the header Layer 3 adds identify?
Identifies the IP Address of the destination host.
Once the Network Layer header has been added what is the new name of the segment or datagram?
It is now called a Packet
What does the Data Link Layer do to the packet once it hits the NIC?
It encapsulates the data with its own header and trailer
Once the header and trailer are added on the Data Link Layer what is the new name of the packet?
It is now called a Frame
What does the Layer 2 Frame include?
A physical address used to find a node on the local network.
What happens to the Frame once it reaches the Physical Layer?
The NIC receives the Frame and places the actual transmission on the network
