y12 networking revision

Question 1

802.11 characteristics

Answer 1

wifi
- uses radio frequencies rather than copper and coaxial
- uses 2 main frequencies - 2.4ghz and 5ghz
- mobile and flexible

Question 2

802.3 characteristics

Answer 2

• transmits data up to 10mbps
• wired connection - twisted pair + fibre optic cables
• ## high reliability and speed

Question 3

functions of a firewall

Answer 3

• packet filtering: inspects each data packet and decides whether to allow or block it
• access control: it determines which users, devices and/or apps can access network resources
• network traffic monitoring: log connection attempts and traffic patterns

Question 4

logging

Answer 4

• provides a record of user activity, used to detect and respond to suspicious behaviour, identify potential security breaches
• several types, like system logs, firewall logs, application logs

Question 5

troubleshooting 802.11

Answer 5

• weak signal strength - distance from WAP, physical obstructions and interference
• interference - other wifi networks, non-wifi devices operating on same frequency
• channel congestion - too many devices or WAPs on same wifi channel
• relocate WAP or add more WAPs
• change wifi channel to less congested one
• update firmware and network adapter drivers

Question 6

troubleshooting 802.3

Answer 6

• fault cables
• incorrect cable type
• port & driver issues
• check physical connections
• inspect cables
• restart devices
• update drivers

Question 7

http

Answer 7

• hyper text transfer protocol
• set of rules a server must follow for the transmission of files

Question 8

https

Answer 8

• hyper text transfer protocol secure
• enhances data security and user privacy
• https is a combination of http with a secure socket layer (SSL)
• all communications between your browser and website are encrypted
• requires domain validations and certain certificates