computer networks Flashcards
kernel
tells you where to find operating system
network
2 or more devices(nodes) connected by some type of communications channel
node
any device connected to the network
-user device
-switch -connect nodes to each other
-router-connect to internet
-service device - printer or server
types of communication channel
bounded or unbounded(wireless)
server
computer designed to act as central network computer that provides various resources (network security, hardware access, disk space, printer access.
has software which manages logins and user access to computers on network
area eg school.office buildings network name (limited )
LAN , local area network
network name city
metropolitan area network (MAN)
network name large company
wide area network (WAN)
worldwide WAN
global area netwok
network individual eg hot spot
personal area network pan
network name home
home are network
router
small electronic device
joins networks together through wired or wireless connections
types of networks
LAN,MAN,WAN,GAN,PAN,HAN
cloud computing
makes use of computing services like storage,databases,software,networking and over the internet “the cloud”
only pay for services you use
cloud competing
making use of competing services like storage, databases, software, networking + more over internet “the cloud”
types of nodes
devices that users use (laptop,desktop,mobile device)
devices to connect nodes to each other (switch)
device to connect to internet (router)
device to provide service (server or printer)
switch
connect nodes in network using communication media such as cables.
node connected to ports in switch
3 parts of communication media
- hardware - source or sender
- hardware- destination or receiver
- connection between source + destination
what is the connection between source and destination
communication channel or transmission medium
bandwidth
maximum amount of data that it can transfer per unit time (usually bits/sec)
what is the rate that data is transferred over communication channel measured in
thousands of bits per second (kilobits per second Kbps)
millions of bits per second (megabits per second Mbps)
billions of bits per second (gigabits per second Kbps)
what is bounded media
consist of physical cabling
commonly used for wired LANs