18.5. Important Concepts in Network Programming

Try these first

1. 1.

   What is the range of ports in networking?

   Hint

   Think of the lowest and highest numbered ports.

2. 2.

   What does DNS stand for?

   Hint

   Consider what it helps do in a network.

3. 3.

   What is the purpose of DNS?

   • A device identifier
   • Translation of domain names to IP addresses
   • A type of network protocol

   Hint

   Think about how you visit websites.

4. 4.

   Is IPv6 replacing IPv4 due to limited address space?

   • True
   • False

   Hint

   Consider the number of devices connected to the Internet.

5. 5.

   Design a simple network communication system where two applications use different ports to communicate. Outline which ports you would use and explain why.

   Hint

   Think about popular port usage patterns.

6. 6.

   Research and explain how DNS caching works and why it is critical for reducing server load.

   Hint

   Consider how often web pages are looked up.