Define network
collection of computers that connected together via communication device and transmission media
advantages of network
- sharing hardware and software
- sharing data and information
- facilitating communication
- transferring funds
LAN (local area network)
in limited geographical are
LAN (local area network)
in limited geographical are
WLAN: wireless
5 types of networks
- LAN
- WLAN
- MAN (metropolitan)
- PAN (personal)
- WAN (wide area)
Broadband media
transmit multiple signal simultaneously
Define bandwidth and latency
bandwidth: amount of data, information and instruction that can travel over the transmission media
latency: time taken by a signal travel from one location to another on the Internet
3 types cable used in LAN
- twisted-pair cable
- coaxial cable
- fiber optic cable
Broadcast radio
a wireless transmission medium that distribute radio signal via the air over long distances
communication satellite
- receive microwave signal from an earth-based station
- amplifies it
- broadcast the signal over a wide area to any number of earth-based station
GPS (Global Positioning System)
navigation system to determine user’s geographical location
- consists of one or more earth-based receiver
- accept and analyze the signal sent by satellite
wifi standard
802.11
TCP/IP
network protocol that define how the data routed from one network to another
token ring
share and pass a special signal
ADSL
a DSL that support faster downstream rate than upstream rate
examples of communication lines
- cable
- DSL
- T-carrier
- ATM
