TCP Flashcards
What are the 4 levels of the TCP stack in order (top to bottom)?
- Application
- Transport
- Network
- Link
What does the application layer do?
- Allows communications between applications
- ## Has many different protocols (i.e. ftp, http, htpps, etc.) as there are many different requirements
What does the transport layer do?
- Communicates between hosts to agree on settings like:
- Language
- Packet Size
What does the network layer do?
- Provides end to end communication across the network:
- Addresses and packages
data - Routes data across
network
- Addresses and packages
- About communicating across the WAN
- Basically sends and receives packets
What does the link layer do?
- Communicates to the next device in the network
- Usually on the same LAN
What is a TCP/IP socket and what does it do?
An endpoint of two way communication which is bound to a port number so the TCP layer can identify the application the data is to be sent to
What is a port
Logical construct that identifies a specific process or type of network service
What is FTP?
File Transfer protocol is a protocol used to transfer data across the internet efficiently
What is HTTP(S)?
Hyper Text Transfer Protocol (Secure) is used to send data between a web browser and website (Secure has better encryption)
What is POP3?
Post Office Protocol v3 retrieves email from a mail server and stores it locally on a device
What is IMAP?
Internet Message Access Protocol retrieves email from a mail server and synchronises it across devices
What is SSH?
Secure Shell remotely accesses and manages a computer
What is a MAC address?
Media access control address is a 12 digit Hexadecimal code hard coded into every device uniquely identifying every device in the world.
