Wired and wireless networks Flashcards
How are Wired Networks identified and what devices are they used for
By their use of physical wiring to connect devices
For devices Unlikely to move
How do Wireless Networks carry signals and what are their Advantages+Disadvantages
They use radio waves
They Can be blocked by walls + Limited in range
Ideal for portable devices if in range of Wireless Access point
What has the advantage in these things over wireless and wired networks : Cost,Installation difficulty,Max transmission speed,Range for reliability,Security
Wireless is cheaper to set up if in range of WAP
Wired requires technical knowledge in wiring so more difficult
Wired can go 1GB P/S and Wireless 50 MB P/S
Wired can go 2KM with fibre optic 100M with ethernet
Wireless less secure as physical connection not needed and signals cannot be contained in the building
What is Bluetooth and what does it do and give examples that use it
A form of wireless communication
Allows devices to communicate with each-other like a private network
Wireless Keyboard/mouse
What is Encryption give an example of it and how does it work
The process of disguising a message so that the only the sender and the recipient can understand it
Caesar Cypher - To encrypt plain text increase the letter by a value E.G (A+1 = B) to decode just reverse
What are the protocols that govern addressing
Internet protocol(IP)
Media access control (MAC)
What is IP addressing
When a node wants to send a message to another node it uses the recipient IP address a switch in the network knows where the recipient is and will route accordingly
What is a node
A device on a network
What are static and dynamic IP adresses
Static-The devices IP address is always the same even after they left the network then rejoin
Dynamic-The ip address changes every time the device reconnects also known as DCHP when the device disconnects its space/address is used for another device
What is Mac addressing what is it recorded in
The Mac address is embedded in the network interface controller it cannot be changed this makes it easy to find the address on a device on a DCHP network
Name 5 other Protocols and what they do
TCP/IP- Transmission control /Internet protocol enables communication over the internet
HTTP/HTTPS-Hypertext transfer protocol governs communication between a webserver and client (secure) adds encryption to allow transactions to made securely
FTP-File transfer protocol govens the transmission of files across a network and the internet
SMTP-Simple mail transfer governs the sending of a email on a network to a mail server
POP/IMAP- Post office protocol internet message access protocol governs the retrieval of emails form mail servers
What is Network layering and what are the 4 steps
To break up the sending if messages into different components and activities
Application layer-encodes/decodes message so it is understood by sender and recipient
Transport layer- message is broken down into small chunks (packets) the packets are given a number and total number of packets the recipient then arranges them and figures out how much are lost
Network layer- adds senders ip address and recipe tent the network then knows where to send the message and where it came from
Link layer- allows the transfer of packets between one node and another
