Networks

fidelity

wierność

capabilities

możliwości

node

węzeł

radio waves

fale radiowe

access point

punkt dostępu

receiver-transmitter

Nadajnik-odbiornik

topology

topologia

connection point

przyłącze

redistribute

ponownie rozdzielać

bus

szyna

fibre-optic cable

światłowód

far apart

daleko od siebie

boundaries

Granice

checksum

suma kontrolna

reversed

odwrócony

subdivided

podzielony

supervise

kontrolować

congestion

zator

reassemble

zmontować

reroute

przekierowywać

header

nagłówek

comprising

zawierający

encode

zakodować

wiring (the system of wires)

okablowanie (układ przewodów)

token

odznaczenie

occur

wydarzyć się

span

rozciągać

slate

tabliczka

Local Area Network

LAN

peer-to-peer

type of LAN architecture- two computers have the same capabilities

client-server

type of LAN architecture where one computer acts as server controlling other workstations

Ethernet

one of the most common protocols for LAN

router

connecting different networks together, allows several computers on LAN to share internet connection

Gateway

interface enabling dissimilar networks to communicate

Bridge

hardware and software combination used to conect the same types of networks

Backbone

handle major data traffic

Network

number of computers and peripherals linked together

LAN

network connecting computers over a small distance such as company

Server

powerful computer storing data shared by clients

client

network computer

thin client

single computer

hub

electronic device connecting all data cabling

Application Layer

part of communication process that user sees. This layer converts a message's data from human-readable form into bits

Presentation Layer

ensures that message is transmitted in language that receiving cmputer can interpret. Translates language, encrypts

Session Layer

opens communication and has job of keeping straight the communication among all nodes. It set boundaries for the beggining and end of message. Establish whether message is send in full or half duplex

Transport Layer

protects data being sent. It subdivides data into segments, creates checksum tests- that can be used later to determine if the data was scrambled. I make backup copies of data

Network Layer

selects route for the message and forms data into packets, counts them and adds header cotaining sequence of packets

Data-link Layer

supervises transmission, confirms the checksum, keeps copy of each packet until it receiver confirmation from the next point

physical layer

encodes packets into analogue signal if the message is going across a telephone line and sends packets along that medium

intermediate node

calculates and verifies the checksum for each packet, reroute the message to avoid congestion on network

half-duplex

each computer takes turns sending and receiving

full-duplex

both computers send and receive at the same time

modem

used to convert signals from analogue to digital

Access Point

enable computers to be connected together to form WLAN

asynchronous transmission

sends one byte at the time

synchronous transmission

sends data in blocks

Wireless fidelity

Wi-Fi

WiFi

creation of WLANS where cables and wires ale replaced by radio waves

Wireless Local Area Network

WLAN

hotspot

WLANs available for public use

Star topology

topology where central devicce has all devices directly connected to it.

bus topology

topology where every workstation is connected to main cable

ring topology

Topology where workstations are connected one to another in closed loop

tree topology

topology where group of stars ale connected to one bus

WANs

have no geographical limit and may connect computers or LANs on opposite sides od the world.

Internet

the largest WAN in existence

Wide Area Networks

WANs

Integrated Services Digital Network

ISDN

Digital Subscriber Line

DSL

Network interface card

NIC

Wired Equivalent Privacy

WEP