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SingaporeComputer ScienceQuick questions
Networks and the Internet
Quick questions on IP addressing and subnetting explained: H2 Computing
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are iPv4 addresses?Show answer
An IPv4 address is 32 bits, written as four octets (8-bit numbers) in dotted-decimal, each to :
What is the subnet mask?Show answer
A subnet mask marks which bits are network and which are host: a for each network bit, a for each host bit. For example:
What is hosts per subnet?Show answer
With host bits there are addresses, but two are reserved:
What is q1?Show answer
How many usable host addresses does a subnet with 8 host bits provide? [2 marks]
What is q2?Show answer
How does a device use the subnet mask to decide if a destination is local? [2 marks]
What is q3?Show answer
State the main reason IPv6 was introduced. [1 mark]
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