Wireless networks

Question 1

What is WiFi

Answer 1

A general term for some WLANS
Devices is connected to each other while one of the devices is connected to the wired internet

Question 2

What is a wireless router

Answer 2

Something that allows both wired and wireless devices to connect to the internet

Question 3

What is a Wireless Access Point

Answer 3

A WAP provides a wireless connection to the wired LAN

Question 4

What is a SSID

Answer 4

A service set identifier which is a network’s name

Question 5

What is the CSMA/CA protocol

Answer 5

Carrier sense multiple access with Collison Avoidance
A protocol to check if the transmission medium is idle or busy. If idle the data is sent but if busy it will wait a random amount of time before trying again

Question 6

What is the RTS/CTS protocol

Answer 6

Request to Send / Clear to Send
An extension protocol that if required is used after medium is found to be idle.
It will RTS request message sent, waits a CTS
Router sends a CTS one station at a time
If a CTS is received, sending station proceeds
Otherwise wait a random amount of time before trying again

Question 7

What is ACK

Answer 7

A check if a frame or packet has been received correctly
If an ACK is not received it will resend the packet

Question 8

How can you protect against threats

Answer 8

1. Turn off broadcasting for SSID cannot be seen
2. Use WiFi Protected Access (WPA3), provides encryption, keys and user authentication
3. Create a whitelist of allowed MAC addresses