Computer networks, connections and protocols

Question 1

Explain the difference between IPv4 and IPv6

Answer 1

IPv6 has been instated as the world has more active devices than IPv4 can log, IPv6 address is 128 bits long compared to IPv4’s 32.

Question 2

What is the Internet and how does it differ from the World Wide Web

Answer 2

The internet is a global network of interconnected networks, not owned or managed by anyone. The WWW is all the web pages accessible via the internet

Question 3

What happens when a user types a URL

Answer 3

The URL is sent to a local DNS, translating it to an IP address, which if found is sent back to the browser.

Question 4

What are the advantages of using DNS servers

Answer 4

-Humans dont have to type or remember IP addresses
-If a domain’s IP address changes, the DNS is updated
-Distributed DNS servers means all addresses can be accessed from a local DNS

Question 5

What is a URL?

Answer 5

The address of a particular page on a website

Question 6

Why are IP addresses used instead of MAC addresses?

Answer 6

Although each device’s NIC has a designated MAC address, they are physical and not routable meaning one device cant learn the MAC address of another.