Week 02 - IP Addresses IPv4 & IPv6 (L04-L05)

Question 1

How does an IPv6 address looks like?

Answer 1

128 bit with 8 octet in hex. 3565:FA34:3423:4543:2342:2342:9089:0395

Question 2

Explain the different allocation types of DHCP.

Answer 2

• Dynamic,
• Automatic,
• Static

Question 3

What are the IPv6 scopes?

Answer 3

• Link Local: regular address;
• Site local: adress for machine in network;
• Global: address for machine in Internet

Question 4

What is DHCP and what benefit is it in network administration?

Answer 4

Dynamic Host Configuration Protocol. Used for IP address assignment. Less manual work.

Question 5

What are the IPv6 types?

Answer 5

• unicast: 1:1;
• multicast: 1:n;
• anycast: n:n

Question 6

What is a lease?

Answer 6

Duration that a node can keep an IP

Question 7

What is zero configuration? What is it called in Microsoft, Apple, Linux?

Answer 7

Configured to DHCP but no DHCP is present. IP in the range of 169.254.x.x; Microsoft: APIPA, Apple: Bonjour, Linux: AVAHI

Question 8

What is IPv6?

Answer 8

Superior of IPv4. Due to the lack of IP address left and some security issues in IPv6. 128 bit address.

Question 9

How can you identify if an IP address is a class A, B, or C address?

Answer 9

By the first octet of the IP address:

• 0xxx - Class A,
• 10xx - Class B,
• 110x - Class C

Question 10

For what are IP addresses used for?

Answer 10

Unique addresses for network nodes to communicate with each other.

Question 11

What are the four steps of DHCP negotation?

Answer 11

• SERVICE DISCOVERY
• IP OFFER
• IP REQUEST
• IP LEASE

Question 12

How does a client in zeroconf assures, that no one lease has the same IP address?

Answer 12

Sends ARP broadcast

Question 13

What is a subnet mask?

Answer 13

A subnet mask shows which part of an IP address identifies the local network and which part defines the host.