Network Basics Flashcards
What’s the purpose of networks?
The purpose of networks is to make connections between machines (sending data from one place to another)
What are examples of network?
Examples of network are:
smart watch and smart phone
tablet and Wi-Fi access point and internet
desktop and hub and switch and router and internet
(all of them are converged networks)
in olden days -
telephone network - (only making phone calls)
computer networks - (only transferring data over a digital network)
What kind of network traffic can you expect to see within converged networks?
Network traffic you can expect to see within converged networks are:
file sharing video chatting (skype) surfing the web social media streaming videos e-mails instant messages phone calls
a lot of different things and a new types of traffic happening all the time as well because new things are being designed and added to our networks
What comprises our networks?
Networks are comprised of:
client server wireless access point hub switch router WAN Link Media
What is client?
Client is a device used by an end-user to access network (any device that connects to the network)
What is server?
Server is a device that provides resources to the rest of the network (different servers provides different functions i.e. a web server, an email server, a file server, a chat server, a print server)
What is a hub?
A hub is an older technology that connects network devices together (using hubs can lead to increased network errors)
What is WAP?
Wireless access point (WAP) is a device that allows wireless devices to connect into a wired network
What is a switch?
A switch is a device that connects network devices together (like a next generation hub)
What is a router?
A router is a device that connects two different networks together and forwards traffic to and from a network
What is media?
Media connects two devices or a device to a switch port
What is WAN Link?
Wide Area Network (WAN) physically connects two geographically dispersed networks
What is client server model?
Client server model uses a dedicated server to provide access to files, scanners, printers, and other resources
What are benefits of client server model?
Benefits of client server model are:
Centralized administration
Easier management
Better scalability
What are drawbacks of client server model?
Drawbacks of client server model are:
Higher cost
Requires specialized OS
Requires dedicated resources
What is Peer-to-Peer Model?
In Peer-To-Peer Model peers share resources (files/printers) directly with others
What are benefits of Peer-To-Peer Model?
Benefits of Peer-To-Peer Model are:
Lower cost
No dedicated resources
No specialized OS
What are drawbacks of P2P Model?
Drawbacks of Peer-To-Peer Model are:
Decentralised management
Inefficient for large networks
Poor scalability
What is PAN?
Personal Area Network (PAN) is the smallest type of wired or wireless network that covers the least amount of area (i.e. Bluetooth, USB)
What is LAN?
Local Area Network (LAN) connects components within a limited distance
What is the number of Ethernet?
The number of Ethernet is (IEEE 802.3)
What is the number of Wi-Fi?
The number of Wi-Fi is (IEEE 802.11)
What is CAN ?
Campus Area Network (CAN) connects LANs that are building-centric across a university, industrial park, or business park
What is MAN?
Metropolitan Area Network (MAN) connects scattered locations across a city or metro area
What is WAN?
Wide Area Network (WAN) connects geographically disparate internal networks and consists of leased lines or VPNs
Network types diagram
What is Bus Topology?
Bus Topology uses a single cable where each device taps into by using either a vampire tap or a T-connector
What is Ring Topology?
Ring Topology uses a cable running in a circular loop where each device connects to the ring but data travels in a singular direction
What is Token Ring?
Token Ring is a ring topology that uses an electronic token to prevent collisions when communicating on the network
What is FDDI?
Fiber Distributed Data Interface (FDDI) uses two counter-rotating rings for redundancy
(modern ring networks are usually FDDI networks)
What is Star Topology?
Star Topology is a most popular physical LAN topology where devices connect to a single point
(if the central device fails, the entire network fails)
What is Hub-and-Spoke topology?
Hub-and-Spoke topology is similar to Star but with WAN links instead of LAN connections and it is used for connecting multiple sites
What is Full-Mesh Topology?
In Full-Mesh Topology optimal routing is always available as every node connects to every other node
What is Partial-Mesh Topology?
Partial-Mesh Topology is a hybrid of the full-mesh and the hub-and-spoke topologies
What is Infrastructure Mode?
Infrastructure mode uses a wireless access point as a centralised point and supports wireless security controls
What is Ad Hoc Mode?
Ad Hoc Mode is a decentralised wireless network which creates P2P connections and does not require a router or access point
What is Wireless Mesh Topology?
Wireless Mesh Topology is an interconnection of different types of nodes, devices, or radios
(creates redundant and reliable connections)
What is Internet of things (IOT)?
Internet of things (IOT) consists of billions of physical devices around the world that are connected to the internet, all collecting and sharing data
What is 802.11?
802.11 are wireless networks that can operate in infrastructure or ad hoc modes
What is Bluetooth?
Bluetooth is a wireless technology that allows the exchange of data between different devices (low energy variant - reduced power consumption) (uses mesh topology)
What is Radio-Frequency Identification (RFID)?
Radio-Frequency Identification (RFID) uses electromagnetic fields to read data stored in embedded tags
(i.e. magnetic stripe card in a hotel)
What is Near-Field Communication (NFC)?
Near-Field Communication (NFC) enables two devices to communicate within a 4-cm range
What is (IR)?
Infrared (IR) operates with line of sight
i.e. tv pilot
What is Z-Wave?
Z-Wave provides short-range, low-latency data transfer with slower rates and less power consumption than Wi-Fi
(used in home-automation)
What is ANT+?
ANT+ collects and transfers sensory data
sensors - i.e. collecting the temperature, how bright something is
