| Give the order of the TCP/ IP stack starting from application layer | Application Layer
Transport Layer
Network Layer
Link Layer |
| State what the Application Layer is used to do? | Used to provide services for applications that want to communicate across a network, often the Internet |
| What does the Link Layer do | Adds the MAC address to packets |
| Over what medium does the link layer operate across? | The link layer operates across a physical connection |
| Whats a MAC adress | A MAC address uniquely identifies a physical device with a Network Interface Card |
| What does a port do | A port is used to alert a specific application to deal with data sent to a computer |
| What do protcols use port numbers for? | specify what data is being sent |
| Whats the IP adress of this:
42.205.110.140:80 | Before colon
42.205.110.140 |
| Whats the socket adress of this:
42.205.110.140:80 | Whole thing
42.205.110.140:80 |
| In the link layer, what changes with each hop | MAC addresses change with each hop |
| Whats the port number in this:
42.205.110.140:80 | After colon
80 |
| Define what the Network Layer does | Uses the Internet Protocol to address packets with the source and destination IP addresses |
| Define what the transport layer does | Uses the TCP (Transmission Control Protocol) to establish an end‐to‐end connection with the recipient computer |
| State the task of the Application layer | Uses high-level protocols that set an agreed standard between the communicating end-points
SETS AN AGREED STANDARD BETWEEN SENDER AND RECEIVER |
| What is the TCP/ IP stack | The TCP/IP stack is a set of rules used in turn, to format a message so it can be sent over a network |
| What does the transport layer actually do? | Splits data into packets
Numbers packet sequentially
Adds port numbers
At receiving end confirms packets been received and requests any missing |
