Chapter 11 - Perspectives on IPv4 Subnetting

Question 1

True or False. Addresses in the same subnet are separated by a router.

Answer 1

False. Addresses in the same subnet are NOT separated by a router.

Question 2

Addresses in different subnets are separated by at least one of these.

Answer 2

Routers.

Question 3

You should plan to use one subnet for every one of these. (4 items)

Answer 3

1) VLAN
2) Point-to-point serial link
3) Ethernet emulation WAN link (EoMPLS)
4) Frame Relay PVC

Question 4

How many bits are in an IP address?

Answer 4

32 Bits

Question 5

What are the 3 parts of an IP address?

Answer 5

Network, Subnet, Host

Question 6

What defines the size of the subnet?

Answer 6

The subnet mask.

Question 7

What is VLSM?

Answer 7

Variable length subnet masks

Question 8

What technology allows different companies to reuse the same IP networks?

Answer 8

NAT - network address translation

Question 9

The Internet community worked hard during the 1990’s to solve the problem of exhausting the public IP address space by coming up with what 3 different solutions?

Answer 9

1) A new version of IP (IPv6), with much larger addresses (128 bit)
2) Assigning a subnet of a public IP network to each company, instead of an entire public IP network; to reduce waste
3) Network Address Translation (NAT), which allows the use of private IP networks.

Question 10

What is the Class A IP private network?

Answer 10

10.0.0.0

Question 11

What is the range of Class B private networks?

Answer 11

172.16.0.0 through 172.31.0.0

Question 12

What is the range of Class C private networks?

Answer 12

192.168.0.0 through 192.168.255.0

Question 13

How many bits are there in the network and host portions of a Class A network?

Answer 13

Network = 8 and Host = 24

Question 14

How many bits are there in the network and host portions of a Class B network?

Answer 14

Network = 16 and Host = 16

Question 15

How many bits are there in the network and host portions of a Class C network?

Answer 15

Network = 24 and Host = 8

Question 16

Each subnet contains what 3 things?

Answer 16

Subnet number, subnet broadcast, IP addresses

Question 17

What is a subnet number?

Answer 17

The subnet ID or subnet address, this number identifies the subnet.

Question 18

What is a subnet broadcast?

Answer 18

Also called the subnet broadcast address or directed broadcast address, this is the last (numerically highest) number in the subnet.

Question 19

What are the IP addresses within the subnet?

Answer 19

All the numbers between the subnet ID and the subnet broadcast address.