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Questions and Answers List

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QuestionAnswer
What is a Computer Network?Two or more computing devices connected to communicate and share resources.
What is a node?A computing device on a computing network. eg. Phone,Tablet, Laptop, Desktop,Server, Switch,Router etc.
What is a client?Request access to a resource.
What is a server?Provides access to a resource. eg. File server, print server, database server, application server, mail server, web server.
Types of Networks (DISTANCE).LAN, WAN, HAN, PAN, MAN.
Characteristics of a Local Area Network.Connects to two or more nodes Connects a small geographic area Connection is: fast(100 mpbs or more), constant, private.
Characteristics of a Wide Area Network.Connects two or more networks. Covers a large geographic area. eg. Internet. Connection is: slow(100 mbps or less), occastional, public.
Characteristics of a Personal Area Network.Connects personal devices via bluetooth.
Characteristics of a Home Area Network.Connects devices in a home, typically via Wi-Fi using a wireless router.
Two types of Network.(ARCHITECTURE)Peer 2 Peer, Client/Server
Characteristics of a Peer 2 Peer Network.Computers have mixed roles. No central authority.(All are equal). Basic Operating System feature. (Windows 10, Linux, MacOs)
Characteristics of a Client/Server.Computers have dedicated roles. There is central authority for access and resources. Advanced Operating System: (Windows 2019,2016,2012,2003), MacOs Server, Linux, Unix
Types of Networks(TOPOLOGY).Bus Topology, Star Topology, Ring Topology, Mesh Topology, Hybrid Topology.
Define Bus Topology.Single cable(Backbone) between two terminators with nodes connected to the backbone. It should be noted that this is hardly used.
Advantages of a Bus Topology.Inexpensive and easy to implement.
Disadvantages of a Bus Topology.Difficult to add, move, change and troubleshoot. Single point of failure. Congestion due to broadcasts. All data is seen by all nodes.
Define Ring Topology.Nodes connected in sequence with each node connected to the previous and the next, with last connected to the first. USED FOR WANS.
Advantages of Ring Topology.Easy and inexpensive to implement Easy to add, move, change and troubleshoot. No broadcast.
Disadvantages of Ring Topology.Single point of failure. All data is seen by all nodes.
Define Star Topology.Central device (eg. Switch) with individual cables connecting each node. USED FOR LAN.
Advantages of Star Topology.Easy to implement. Easy to add, move, change and troubleshoot. No cable or node is a single point of failure. Less congestion. Data is seen by target node.
Disadvantages of Star Topology.Expensive to Implement. Central device is a single point of failure.
Define Mesh Topology.Each node connected to each other node. n (n-1)/2. USED FOR LAN.
Define Hybrid TopologyA mix of two or more topology. eg. Tree Topology.