1.3 Computing Networks, Connections and Protocols Flashcards
What is a computing network?
- A group of two connected computers or more
What is a graph?
- A diagram to display connections
What is a client?
What is a server?
- The client requests actions from the server.
- The server responds to the requests of the client.
What is a node?
What is an edge?
- Circles on a graph representing connections
- Lines on a graph representing connections
What are the advantages of using a network?
- Efficient
- Data openable across devices
- Data uploadable across devices
What are the disadvantages of using a network?
- Expensive
- Specialist management
- Cyber attacks
What is a peer-to-peer network?
- Devices can act as both the client and server
What are advantages of the peer-to-peer network?
- Cheap
- Efficient
- Non dependant on a server
What are the disadvantages of the peer-to-peer network?
- No backup system
- No security
- Overloading of requests
What is a client-server network?
- Clients make requests to a server
What are the advantages of the client-server network?
- Multiple requests
- Central storing
- Easy backups
- Easy maintance
- A client computer breaking wouldn’t effect the network
What are the disadvantages of the client-server network?
- Expensive
- Specialist management
- If the server fails, everyone is disrupted
What is a PAN?
- Personal area network
- Single user with multiple connected devices
What is a LAN?
- Local area network
- Multi-user network with multiple connected devices
- Owned by a small organisation
What is a WAN?
- Wide area network
- Multiple LANS connected together
What is a WAP?
- Wireless access point
- Provides wireless access to the internet
- Sometimes built into router
What is a router?
- Moves data from one network to another
- Commonly used to connect to internet
What is a switch?
- Wired connection of devices
What is a hub?
- Wired connection of devices
- Data is broadcasted
What is a NIC?
- Network interface card
- Enables connections between devices
What is a bridge?
- Connects a LAN to another LAN
- Reduces internet traffic
What is a MAC?
- Media access control
- Used to identify devices in a network
What is a topology?
- A type of arrangement in a network design
What is a star topology?
- Central node with all other nodes connected to it
What are the advantages of a star topology?
- Damages only affect specific nodes
- Handles heavy loads
- Easily add new nodes
What are the disadvantages of a star topology?
- Central node is a single point of failure
- Expensive
What is a bus topology?
- Nodes connected to a single cable
- Terminators at either end
What are the advantages of a bus topology?
- Cheap
- Simple
- Good for small networks
What are the disadvantages of a bus topology?
- If the main cable fails the whole network fails
- Unsecure
- Bad for heavy loads
What is a ring topology?
- Nodes connected in a ring
- Data moves one direction
What are the advantages of a ring topology?
- Less chance for data collision
- Additional nodes have minimal impact on performance
What are the disadvantages of a ring topology?
- Multiple single points of failure
- Unsecure
- To add new nodes, whole network needs to be shut down
- Slow as the slowest two nodes in the network
What is a mesh topology?
- Nodes connected to at least one other node
What are the advantages of a mesh topology?
- No single point of failure
- Efficient
- Works well under heavy loads
- Easy to add new nodes
What are the disadvantages of a mesh topology?
- Expensive
- Complicated
What are examples of wired transmission media?
- Copper cable
- Fibre optic
What are examples of wireless transmission media?
- Bluetooth
- WiFi
How does copper cable transmit data?
- Electrical pulses
How does fibre optic transmit data?
- Light pulses
How does Wi-Fi and Bluetooth transmit data?
- Radio signals
What are the advantages to copper cables?
- Cheaper
- Stable
What are the disadvantages to copper cables?
- Disturbances
- Slower
- Short distances
What are the advantages of fibre optic?
- Fast
- Long distances
- Stable
What are the disadvantages of fibre optic?
- Expensive
What are the advantages of WiFi?
- Large range
- Multiuser
- Mobility
- Cheaper
What are the disadvantages of WiFi?
- Unsecure
- Unreliable
- Decreases as more users
What are the advantages of Bluetooth?
- Low cost
- Low power
What are the advantages of bluetooth?
