2 communication Flashcards
(25 cards)
private networks
- owned by a single company with restricted user access
public network
owned by a communications carrier company with no password requirement
LANS
contained within a small geographical area
consists of computers connected to switches which are connected to a router to allow the LAN to connect to the internet
Wireless access point (WAP)
allows a device to access a LAN without a wired connection
WANS
convers a large geographical area
features of peer to peer network
- computers can communicate and share resources
- each computer is responsible for its own security
drawbacks of peer or peer network
- reduced security as each computer is at risk of viruses from other computers
- users will need to manage their backups because if data is not backed up from one computer it’s lost to all
features of a wired network
- no interference more reliable and stable
- transfer data faster
benifits of cloud computing
- free for small quantities
- can be accessed by any computer with internet access
drawbacks of cloud computing
- can only access with internet access
- limit to amount of storage unless paid for
public IP address
visible to any device on the internet
private IP address
only visible to devices within LAN
dynamic IP address
a new one is reallocated each time a device connects to the internet
static IP address
does not change each time a device connects to the internet
functions of wireless network interface card (WNIC)
- provides interface to a wireless network as an antenna
- received analogue radio waves and converts them to binary
star topology
all devices are only connected to the router
functions of a router
- receives packets from devices
- route packet to destination
- find destination of packet
fiber optic cable
- transmits data using light
- high bandwidth
- hard to hack into
- transmits data over great distances
copper cable
- transmits data using electrical signals
CSMA
- workstation listens to communication channel
- if channel is free then data is sent
- since there are multiple workstations on the same transmission medium
- two workstations can transmit data at the same time causing a collision
cloud computing
accessing files on a remote server
public cloud
computer services offered by third party
private cloud
computer services offered by private internal network
buffer
temporary storage before it is used by receiving device
