network security

Question 1

authentication

Answer 1

prevent unauthorised access to a network using passwords with
eight letters
number and synomvls
uppercase and lower case
unidentifiable nature

Question 2

encryption

Answer 2

scrambling data to make it readable to add to security in transmitting data. the receiver can then decrypt the scrambled data to reveal the actual data

Question 3

firewall

Answer 3

security system that can be hardware or software based

Question 4

MAC address filtering

Answer 4

media access control (MAC) filtering
- unique hardware value given to a network card in a computer
- allows only devices with a specific MAC address on the NIC to join the network (or refuse devices with a specific MAC address)
-not commonly used as can easily be spoofed/tricked

Question 5

protocol

Answer 5

set of rules that govern network operations

Question 6

application layer

Answer 6

collecting and distributing data
makes sure data is suitable format for transmutation
layer where programs that use networks are operated

Question 7

transport layer

Answer 7

establishing and terminating connections between devices using a router
error detection
speed at which data can be sent if recieved

Question 8

network layer

Answer 8

exchange of data between lots of different networks
establish route to the destination of data packet

Question 9

data link layer

Answer 9

ensures hardware can be used to transmit data
ensures that any transmission media can be used