Describe the purpose of a protocol? [2]
-Provides a standard set of rules to enable successful data transfer
-Allows communication between devices from different manufacturers (makes communication independent of software and hardware)
What is the purpose of SSL/TSL? [2]
-Provides secure communication over the Internet by encryption
-Enables two parties to identity/authenticate each other
State all the protocols in the Application Layer and their uses [8]
HTTP: Used to transfer web pages/hyper text documents between server and client
FTP: Used for interactive file sharing over a network between devices
SMP: Used for the sending of emails
POP/IMAP: Used for the receiving of emails
BitTorrent: Provides peer to peer file sharing.
*Allows sharing of files by many users connected together of the internet
* Allows users to share files directly
*Allows for more users to share files than typical peer-to-peer network
Describe the Transport Layer [4]
- Handles packets
- Breaks data in manageable packets to be sent to the Internet Layer
-Handles packet loss/encryption, ensuring packets arrive error free
-Adds a packet header and sequence number to each packet
Describe the Internet Layer [4]
- Identifies the intended network and host
-Transmits packets to the Link Layer
-Routes packets independently
-Addresses packets with their source and destination IP address
Describe the Link Layer [4]
-Deals with physical data sending
-Ensures correct network protocols are followed
-Enables upper layers to access physical medium
-Maps IP adresses to MAC adresses
Describe the process of Circuit Switching [4]
-Data is transferred using dedicated channels and implemented at the physical layer
-Circuit is established before transmission and is released once it ends
-Data is transferred using whole bandwidth
-All data is transferred over the same route
