Subnetting and IP Addresses

Question 1

How do you figure subnets?

Answer 1

Counting 1’s from LEFT to RIGHT

Question 2

How do you figure hosts?

Answer 2

Counting 0’s from RIGHT to LEFT

Question 3

Possible subnets

Answer 3

128
192
224
240
248
252
254
255

Question 4

Class A

Answer 4

IPs: 0-126
Default Gateway: 255.0.0.0 or /8
# Usable Hosts: 16,777,214
Private: 10.0.0.0-10.255.255.255

Question 5

Class B

Answer 5

IPs: 128-191
Default Gateway: 255.255.0.0 or /16
# Usable Hosts: 65,534
Private: 172.16.0.0-172.31.255.255

Question 6

Class C

Answer 6

IPs: 192-223
Default Gateway: 255.255.255.0 or /24
# Usable Hosts: 254
Private: 192.168.0.0-192.168.255.255

Question 7

PAT

Answer 7

Port Address Translation

Port Address Translation / Source NAT

Question 8

DHCP Process

Answer 8

Step 1: DHCPDISCOVER - Client to DHCP Server
* Find all of the available DHCP servers
Step 2: DHCPOFFER - DHCP Server to client
* Send some IP Address options to the client
Step 3: DHCPREQUEST - Client to DHCP Server
* Client chooses an offer and makes a formal request
Step 4: DHCPACK - DHCP Server to client
* DHCP servier sends an ack to the client

Question 9

Collision Domains

Answer 9

Separated by switch/bridge interfaces

Question 10

Broadcast Domains

Answer 10

Separated by router interfaces