IP Addressing

Question 1

IPv4

Answer 1

Four octets, 32 bits, number range between 0-255

Question 2

What makes up classful networking ?

Answer 2

Class A, B, C

Question 3

Provide 1st octect, # of hosts, and subnet mask for Class A.

Answer 3

1-126, 16.7 million hosts, and 255.0.0.0

Question 4

Provide 1st octect, # of hosts, and subnet mask for Class B.

Answer 4

128-191, 65k hosts, and 255.255.0.0

Question 5

Provide 1st octect, # of hosts, and subnet mask for Class C.

Answer 5

192-223, 254 hosts, and 255.255.255.0

Question 6

What are the private/NAT addresses (non-routable IPv4 addresses) ?

Answer 6

10.0.0.0-10.255.255.255
172.16.0.0-172.31.255 255
192.168.0.0-192.168.255.255

Question 7

APIPA (automatic private IP address)

Answer 7

Self assigned by a host when DHCP is not available

Question 8

What range is reserved for APIPA ?

Answer 8

169.254.0.0-169.254.255.255

Question 9

What is the multicast IP range ?

Answer 9

224.0.0.0-239.255.255.255

Question 10

Loopback (local host)

Answer 10

Used for a host to communicate to itself

Question 11

Loopback IP address

Answer 11

Anything in 127.0.0.0 range

Question 12

Why are loopback addresses used ?

Answer 12

Test network connectivity on a local machine by sending packets to itself

Question 13

What does subnetting do ?

Answer 13

Taking bigger classful networks and breaking them down into smaller subnetworks

Question 14

Benefits of subnetting ?

Answer 14

Minimize broadcasting, optimized network performance, simplified management, and security

Question 15

What are some of the IPv6 benefits ?

Answer 15

More addresses, IPSec, no broadcast/multicast based, plug-n-play/auto-configuration

Question 16

What is an IPv6 address ?

Answer 16

128 bits divided into 8 fields, each being 16 bits

Question 17

What do the first 64 bits mean in IPv6 ?

Answer 17

Assigned to an organization (network prefix)

Question 18

What does the IPv6 interface-ID provide ?

Answer 18

Identifies a unique interface on a host

Question 19

IPv6 compression

Answer 19

Drop leading zeros, use double colon for groups of zeros (can only be used once)

Question 20

Global unicast addresses

Answer 20

Publicly routable addresses used to communicate outside of a local network (2000::/3)

Question 21

Unique local addresses

Answer 21

Non-publicly routable addresses used to communicate within a local network (FC00::/7)(FD00/8)

Question 22

Link local addresses

Answer 22

Replacement for APIPA (FE80::/10)

Question 23

What is the multicast IPv6 address

Answer 23

FF00::/8

Question 24

Loopback IPv6

Answer 24

::1, used for testing

Question 25

Anycast IPv6

Answer 25

One to nearest