Networks Flashcards
What is a network?
Two or more computers that are connected together to transmit data.
What are protocols?
Set of rule defining how two devices communicate with each other.
What are protocols standard?
Protocols are standard so devices from different manufacturers don’t have problems communicating.
Describe the structure of the internet.
A global network of interconnected networks.
What does TCP stand for?
Transmission Control Protocol
What does IP stand for?
Internet Protocol
What is the function of the application layer during the data communication?
Specifies what protocols need to be used to relate the application to what it’s being used for.
What is the role of the transport layer during the transport layer during data transmission?
Establishes an end-to-end connection between the source and recipient computers. It also splits the data into packets.
What is the role of the network layer during data transmission?
Adds the source and destination IP addresses.
What is the function of the link layer during data transmission?
Adds the MAC addresses to the packet.
What does the application layer do when it receives data?
Presents data in the form it was sent.
What does the transport layer do when it receives data?
Removes the port number and reassembles the packets.
What does the network layer do when it receives data?
Removes the IP addresses.
What does the link layer do when it receives data?
Removes the MAC address.
What is a local area network (LAN)?
A network spread over a small geographical area/ positioned on a single site.
What is a wide area network (WAN)?
A network spread over a large geographical area, usually requiring extra hardware.
What does DNS stand for?
Domain Name System
What is DNS?
The name given to the method of naming internet resources> (.com, .uk)
What is circuit switching?
The process of creating a direct link between two devices and transferring data the entire duration of the link.
What is a requirement of circuit switching?
The transfer and download rates must be identical on both devices.
What is packet switching?
A method of communicating packets of data across a network.
Give an advantage of packet switching.
- Multiple methods to ensure data arrives correctly
- Multiple methods to arrive to destination, if one breaks you can go through another one
- Transfers packets over a very large network
Give one disadvantage of packet switching.
- Time is spent deconstructing and reconstructing the packets
Give one advantage of circuit switching.
- Data arrives in a logical order which results in a quicker reconstruction of data
- Enables two users to hold a call without any delay
