wired and wireless networks Flashcards
what is a network
collection of connected computers that can communicate by sending data between themselves
what do we use networks for
resource sharing, data exchange, managing computers
what factors affect the performance of a network
choice of hardware, bandwidth, wired or wireless and the topology
is wired faster and more reliable than wireless
true
what is a topology
the way computers are connected and laid out
what is a wan
collection of computers connected over a large geographical area
what is an example of a wan
the internet
what is a lan
collection of computers connected over a small geographical area
what is the most common networking model
client-server model
what does a server do in a client-server model
provides services like storing files, printing and hosting a website
what are the pros of a client-server model
security updates can be managed centrally, clients can be monitored centrally, administrator can retrieve lost files and password, files are stored centrally and members can easily share files
what are the cons of a client-server model
if central server fails then the whole network wouldn’t function, expensive and they are often targeted in cyber attacks like ransomeware and denial of service attacks
what is a peer-to-peer network
where each computer is directly connected to each other
is each peer on a peer-to-peer network responsible for their own maintenance
yes
what are peer-to-peer networks used for
file transfer, streaming videos, wireless printing and blu-tooth speakers
what is a computer called on a peer-to-peer network called
peer
can each peer only be a client or a server
false. they can be either depending on what they are doing
pros of peer-to-peer network
cheap, no dedicated hardware needed, robust, no central server, if one peer fails the others still work, easily set up
cons of peer-to-peer network
files must be duplicated and transferred which can lead to multiple versions that may become out of date, peers may loose connections when trying to access files, hard to update software and security
what is the internet
a worldwide collection of computer networks(a network of networks)
what is internet protocol
a set of rules that make sure devices can work together on the internet
what is an IP address used for
to send and receive data
give examples of applications that cause internet traffic
world wide web(www), email traffic, multiplayer game traffic and video streaming traffic
what is packet switching
the process of how data is transmitted on the internet
why are routers essential for packet switching
they pass data packet between interconnected networks
what is the domain
the name of the server that is hosting the website
