Networks Flashcards
What is lan
Covers a small area (office )
Uses wires cables or fibre optic
Single organisation
What is man
Covers highly populated area ( town )
Wires cables / fibre optic
Services for a community
What is wan
Covers a large geographical area
Fibre optic or public telephone lines or communication satellites
Global services
What is a served
A computer which manages shared resources such as files and hardware and communications
It also processes requests from other nodes
What is a switched hub
Acts as a single connection point for many computers and does thus by checking the destination address of data packets . Uses optimal route
Helps with load balance
What is a Repeater
Regenerates or amplifies signals which are weakens or distorted. Restores to original quality .
Expands area coverage
What is a media converter
Hardware which makes it possible to connect to dissimilar medias
It can change physical signals from one type to another
What is a network card
Circuit board installed in computer that connects to lan network
Allows for communication
Provides connecting port for cables
What is WAP
Hardware device that allows wifi enabled device to connect to a network using radio transmitters and antennae
Wifi hotspots use wap
What is client sever
One or more nodes acts as a server to control the network for multiple client computers .
Needs a log on system
Used In large companies
Peed to peer what is it
No dedicated sever
Each computer supplies resources and have equal status
Each computer controls how its data is shared .
Ideal for sharing files
IP vs MAC
Ip uses 32 bits where as MaC uses 48
IP uniquely identifies the connection address of the computer on the internet where as MAC shows the physical address of the computers
IP can be modified over time and environment where as MAC is permanent
Ip can be static or dynamic where as MAC is only used to identify the device
Easily found by 3rd party mac is not
Provided by internet service provider linked to location of computer mac is set in by manufacturer and is embedded On the NIC .
Client sever vs peer to peer ( security )
Controlled by server and user ID passwords uses
Peer has no central security users may need different passwords for each resource they require
Client sever vs peer to peer ( back up )
All data backed up on server .
Back up is each users responsibility as any computer can delete any file
Client sever vs peer to peer upgrades
Carried out remotely
Must be done on each single node independently
