IPv4 & IPv6

Question 1

What is IPv4 used for?

Answer 1

IPv4 is the primary protocol for everything we do in networking.

Question 2

What is IPv6?

Answer 2

IPv6 is a 128-bit addressing protocol, now part of major operating systems and the backbone of Internet infrastructure.

Question 3

How many addresses are available with IPv4?

Answer 3

IPv4 has approximately 4.3 billion (2^32) addresses.

Question 4

How many IPv6 addresses are possible?

Answer 4

IPv6 can provide up to 340 undecillion (340 x 10^36) addresses

Question 5

What does a subnet mask like 255.255.255.0 do in IPv4?

Answer 5

It is used by local devices to determine the subnet but is not usually transmitted across the network.

Question 6

What is the purpose of a default gateway?

Answer 6

A default gateway, like 192.168.1.1, allows communication outside of the local subnet.

Question 7

What is the role of DNS servers?

Answer 7

DNS servers translate domain names into IP addresses, allowing devices to connect using names like google.com.

Question 8

How many bits are there in an IPv4 address?

Answer 8

An IPv4 address is 32 bits (4 bytes) long.

Question 9

How many bits are there in an IPv6 address?

Answer 9

An IPv6 address is 128 bits (16 bytes) long.

Question 10

What is an example of an IPv4 address format?

Answer 10

192.168.1.131, which can be broken down into 8-bit sections

Question 11

What is an example of an IPv6 address format?

Answer 11

fe80::5d18:652:cffd:8f52, represented in 16-bit sections.