networking Part 1 Flashcards
A computer network is any system of two or
more computers that are linked together is ?
Network Fundamentals
Node means : Each computer or networked peripherals on the network
What are the 3 essentials components of every computer network system ?
Hardware , Software and People
Every single node in a network has a unique address called ?
IP address
A network used for communication between devices close to one person ?
Such as : Connecting a headphone
PAN ( Personal Area network)
Is a network were computers are physically close to each other ?
Such as : Home network
LAN ( Local Area Network)
Is a large network designed to provide a specific geographical area such as an entire city ?
MAN ( Metropolitan Area Network)
Extends over a large physical distance ?
WAN (Wide Area Network) ( internet is the largest )
Bandwidth ( Network Speed) ?
Quantity of data transmitted per sec
Measured in Kilobits/sec, Mbps or Gbps
What Bandwidth depends on ?
Transmission media like copper wire or fiber optic or Amount of traffic on the network
For each node on a network to communicate with other nodes is ?
Network Interface Card
Hardware devices or Software programs that route messages as they travel between networks ( connect two or more) is ?
Routers
Allow any node on the network to communicate with any other node ?
Switches and Hubs
Client/server model ?
One or more computers act as dedicated servers and all the remaining computers act as clients (slow) ( single point of failure)
Peer to peer model ?
Every computer on the network is both client and server ( fast) ( no single point of failure)
It is a system that is available on servers and handles communication and requests from multiple clients is ?
NOS (Network Operating System)
Is a system of rules that allow two or more entities of a communications system to transmit information ( Data exchange) ?
Communication Protocols
How does the internet work ?
By TCP/IP :
The most famous protocol for computer networking
which controls the exchange of data between computers on the Internet
Information that transmitted over the internet is broken into smaller pieces called ?
Packets such as : An email message
Making Connections ?
Modem Connection (Dialup sound) :
It is transmission through Telephone lines Conversion at both ends
Speed: up to 56.6 Kbps
What is greater bandwidth than modems ?
Broadband Connection
Types of making connections ?
DSL: (digital subscriber line) Uses standard Tel Lines
Cable modems: Uses fast TV cables
Satellite connection: Uses TV dishes
Optical Fiber: Sea cables
Is a computer network that uses wireless data
connections between network nodes ?
Wireless Networks
Include:
Wireless Local Area Networks
Cell Phone/Mobile Networks
Wireless Sensor Networks
Wireless Technology Standards like ?
Wi-Fi , Wi-Max , Bluetooth and 3G, 4G, 5G
Wireless Connections ?
Wi-Fi: Fastest growing Wireless technology standard
Uses radio waves to link computers to Wireless Access Point (WAP)
and allows Peer to peer communication
Affected by : Objects blocking and Antenna placement
Is new radio based technology
A single tower can provide access to 25 square mile area ?
Wi-Max
Is a wireless technology standard for exchanging data between fixed and mobile devices over short distances
Designed to quickly and automatically connect devices ?
Bluetooth
Mobile phone Networks ?
Tethering:
It is a Cabling laptop to a mobile phone to get internet connection
Mobile Hotspot:
Tethering done over Wi-Fi where the internet-connected mobile device is acting as a portable Wireless Access Point
(WAP)
Securing Wireless Networks ?
Packets of information on a wireless network are broadcast through airwaves
Anyone with sufficient technical expertise can intercept these signals and decode your messages
Measures to help Secure your
communication ?
Setup a password for your wireless network Use encryption and wireless security protocols Such as :
WEP: Wired Equivalent Privacy (Lowest protection)
WPA: Wi-Fi Protected Access (Compatible with more devices)
WPA2: Wi-Fi Protected Access Version 2 (Most Secure)
