Unit 3 - Networks Flashcards
What is the internet?
The internet is a collection of inter-connected networks.
What does WAN stand for?
WAN stands for Wide Access Network.
What is a WAN?
A WAN is any network in which the computers commuicate using resourced supplied by a ‘third party carrier’ such as BT.
What is an IP address?
An IP address is a unique address that identifies a device on the internet or a local network.
What is a packet?
A packet is one unit of data sent through an IP network.
What is a node?
A node is a point on a network diagram.
What is the DNS?
The DNS (Domain Name System) is made up of domain names. These are names that are used to refer to an IP address.
What is a MAC address?
A MAC (Media Access Control) address is a unique code given to a Network Interface Card which allows it to be identified.
What is a LAN?
A LAN (Local Area Network) is a network that operates on a single site using its own cabling system.
What is a topology?
A topology is the way in which a network is connected.
What is a star network?
A star network is where all the computers and other devices (nodes) are connected to a central switch.
What are the advantages of a star network?
- Fast data transfer to the hub
- If one cable failes, the other computers are not affected
What are the disadvantages of a star network?
- Requires additional hardware
- If the switch goes down, the entire network goes down.
What is a mesh network?
A mesh network is where every node is connected with each other. In a full mesh, every node is directly connected, whereas in a partial mesh, every node is indirectly connected.
What are the advantages of a mesh network?
- No single point of failure
- Expansion and modification can be done without disrupting the entire network
- Data can be transmitted from different devices simulatiously
