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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 carries out its function of forwarding data packets by utilizing the Internet Protocol (IP). When a data packet is received, the router analyzes its destination IP address, which indicates where the packet needs to go.
The router then uses a routing table that contains information about possible paths to various networks. By consulting this table, the router determines the most efficient route for the packet. It forwards the packet to the next hop—usually the next router along the path to the destination. This process is repeated until the packet reaches its destination.
Additionally, routers may use protocols such as RIP (Routing Information Protocol) or OSPF (Open Shortest Path First) to dynamically update their routing tables and improve their decision-making on packet forwarding.
Step 2
Explain why it is important to review network and user policies.
Answer
Reviewing network and user policies is critical for maintaining security and efficiency in network operations. Regular reviews help ensure that policies are up to date with current technology and best practices, which can mitigate risks associated with cyber threats.
Moreover, reviewing these policies allows for the identification of any shortcomings or outdated protocols, enabling organizations to adapt and improve their network management strategies. By ensuring compliance with updated policies, organizations can enhance user productivity and protect sensitive data.