1.3 Computer Network Connectiond and Protocols Flashcards
what are advantages of networking computers ?
easy to share documents, only one internet connection is required as can be shared, centralised backups are carried out automatically, can log into any machine connected to the LAN as stored centrally
definition of bandwidth ?
the amount of data that can be transferred in a given period of time
what is Mbps ?
megabits per second
what is a client server network ?
all devices connected to a central server, which revises and processes requests from clients, server stored user account details and files
three network devices that are in a home ?
router, switch, wireless access point
what is a router ?
it transmits data between at least two different networks
what does DNS mean ?
domain name server
why is fire optic cable good ?
used light to transmit data, can be transmitted over larger distances without loss of signal quality, transmit data at a higher bandwidth
positives of cloud computing ?
can load up files in any location with data connection, easy to increase storage capacity, hardware and maintenance tasks are performed by the provider (no specialists), data automatically backed up
what is a server ?
control access to centralised resources
what is the role of a web server ?
stored content for web pages, layout data and receives and processed requests for web pages
what is a web client ?
sends requests for web pages, sends DNS requests for IP address and displays results of web requests
what is a protocol ?
a set of rules that govern how devices communicate across a network
why are layers used in protocols ?
to make sure changes made do not affect any other layers, makes the software development process more straightforward
what is packet switching ?
splitting data into individual packets so the router can send them to the next location
