Define the term computer network - AQA - GCSE Computer Science - Question 13 - 2021 - Paper 1
Question 13
Define the term computer network.
A computer network is defined as:
- two or more computers;
- connected together (to allow communication).
Worked Solution & Example Answer:Define the term computer network - AQA - GCSE Computer Science - Question 13 - 2021 - Paper 1
Step 1
Define the term computer network.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A computer network is defined as:
two or more computers;
connected together (to allow communication).
Step 2
Explain how a firewall can be used to improve the security of a computer network.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A firewall acts as a barrier between a computer network and external connections/devices. It inspects incoming and outgoing packets of data to determine if they may be malicious. Additionally, a firewall checks if packets are allowed or disallowed by firewall settings, hence restricting certain services or ports.
Step 3
Explain how a firewall can be used to improve the security of a computer network.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Firewalls inspect incoming and outgoing traffic to identify and block malicious data packets. They provide an additional layer of security by evaluating data against established criteria, thereby controlling access to the network.
Step 4
Explain how one of these security methods works.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
I choose Authentication.
Authentication involves taking one or more pieces of data specific to the user. It compares this information against stored credentials and only allows access if the system recognizes them as valid.
Step 5
Shade the two lozenges that are correct statements about network protocols.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
