k.sjhc Flashcards
Types of Networks
LAN, P2P, Server, VPN
Smallest Network
LAN
What is Bandwidth
Network transmission capacity in bits
LAN (Local Area Network)
Connects two or more devices in an area for internet
File Server/Network Server
Computer contains software and data files for LAN
Enterprise Network
Organizations network composed of multiple LAN/WAN
Software-Defined Network
Control how network traffic flows
Wireline Media/Cable
Use physical wires/cables to transfer data/info
Broadcast/Wireless media
Electromagnetic Media to transfer data
Twisted-Pair Wire
Communication medium using strands of copper
Twisted-Pair Wire Advantages
Cheap
Available
Easy to work with
Twisted-Pair Wire Disadvantages
Slow
Interferences
Low security
Coaxial Cable
Insulated copper, high speed data traffic and TV signals
Coaxial Cable Advantages
Faster than TP
Less EM interference
Coaxial Cable Disadvantages
Expensive
Low Security
Difficult to work with
Fibre Optics
Glass fibres transmits info through pulses of light
Fibre Optics Advantages
Fast
Kinda Cheap
Good Security
Fibre Optics Disadvantages
Difficult to work with
Ethernet
Local Area Network Protocol
Transmission Control Protocol (TCP)
Protocol to transfer large files over network, ensuring data arrives intact
Transmission Control Protocol Functions
- Manage Movement
- Send in Order
- Acknowledges transmission
Internet Protocol
Rule that Disassembles, delivers then reassembles packets over the internet
Packet Switching
Divides blocks of texts into packets
Why use Packet Switching
Reliable message delivery and fault tolerant
4 Layers of TCP/IP
Application
Transport
Internet
Network Interface
Application Layer
Allow programs use other layers
Set rules for data sharing
Hypertext Transfer Protocol (HTTP)
Transfer Web Pages
Defines how messages are created and sent
Transport Layer
Helps Application Layer
Handles Communication/Data Packets
TCP and Other Protocols
Internet Layer
Responsible for:
Addressing, Routing, Packing Data Packets
IP
Network Interface Layer
Sends/Receives data packets using networking technology
Network Processing Types
Distributed Processing
Client/Server Computing
P2P
Distributed Processing
Splits tasks between multiple connected computers in a network
Client/Server Computing
System where servers do tasks for end-user PCs
Lead to fat/thin clients
Servers
Provide services over network
Fat Clients
Large Storages
Large Processing Power
No Need for Internet
Thin Clients
No Local Storage
Limited Processing Power
Dependent on Internet
Peer-to-Peer (P2P)
Multiple computers share resources
Acting as both clients/servers
Internet
Massive Global WAN
Internet Backbone
The main high-speed connections that link computers and networks across the world
Intranet
A private network that uses internet software and TCP/IP protocols
Extranet
A network that connects parts of the intranets of different organizations
Internet service provider
(ISP)
A company that provides
internet connections for a fee
How do ISP connect
Through Network Access Points (NAPs)
Network Access Points (NAPs)
Computers that act as exchange points for internet traffic and determine how traffic is routed
Internet Protocol (IP) Address
An assigned address that uniquely identifies a computer on the internet
Domain Name System (DNS)
The system administered by the Internet
Corporation for Assigned Names (ICANN) that assigns names to each site on the internet
Domain Name
The name assigned to an internet site, which consists of multiple parts, separated by periods, that are translated from right to left
World Wide Web
System for sharing and viewing information on the internet using web browsers
Hypertexts
Texts with (hyperlinks) that let you quickly access other content.
Hyperlink
A clickable link that takes you to another page or file
Website
A collection of related web pages from one person or company.
Uniform Resource Locator (URL)
The address that identifies a specific resource on the web
Browsers
Software used to access the web
Search Engine
Program that finds information online using keywords
Meta Search
A program that searches multiple search engines at once and combines their results
Portal
A personalized website that gives access to information and services
Commercial (Public) Portal
A website with general content for many people, offering limited customization
Affinity Portal
A website that provides access to a community with shared interests
Corporate Portal
A website that gives access to important business information, both internal and external to a company
Industrywide Portal
A website that provides information and knowledge for an entire industry
Internet Telephony (VoIP)
Using the internet to make phone calls
Unified Communications
A system that combines voice, email, messaging, and video into one platform for easier communication within an organization
Teleconferencing
Using electronic communication for a conference between people in different locations
Telecommuting
Working from home or other locations, using a computer connected to the workplace
