Photo AI
The internet is the world’s largest network - Edexcel - GCSE Computer Science - Question 7 - 2019 - Paper 1
Question 7
The internet is the world’s largest network. (a) One function of a router is to forward data packets from one network to another across the internet. Describe how a... show full transcript
Worked Solution & Example Answer:The internet is the world’s largest network - Edexcel - GCSE Computer Science - Question 7 - 2019 - Paper 1
Step 1
Describe how a router carries out this function.
Answer
A router forwards data packets by first examining the destination IP address contained within each packet. It utilizes a routing table, which contains information about various network paths, to determine the most efficient route for the packet to reach its destination. When a packet arrives, the router compares the IP address against this routing table to decide where to send the packet next. If the destination is on a different network, the router also determines which interface to use to transmit the packet toward that network.
Step 2
Explain why it is important to review network and user policies.
Answer
Reviewing network and user policies is crucial to ensure that security measures are adequate and effective against current threats. Regular reviews help identify any changes in user behavior or new vulnerabilities that could arise. Additionally, updates in policies promote compliance with regulations and standards, ensuring a safe and efficient network environment.