Create structured addressing plans for IPv4

Question 1

List the RFC 1918 private address ranges

Answer 1

Private addresses

Class A: 10.0.0.0 > 10.255.255.255

Class B: 172.16.0.0 > 172.31.255.355

Class C: 192.168.0.0 > 192.168.255.255

Question 2

True or false: You can use DHCP to specify the TFTP host’s IP address to a client PC.

Answer 2

T

Question 3

Fill in the blank: Without any options, the IP header is bytes in length

Answer 3

20

Question 4

The IP header’s ToS field is redefined as the DS field. How many bits does DSCP use for packet classification, and how many levels of classification are possible

Answer 4

DSCP uses 6 bits, which provides 64 levels of classification

Question 5

True or false: NAT uses different IP addresses for translations. PAT uses different port numbers to identify translations.

Answer 5

T

Question 6

Calculate the subnet, the address range within the subnet, and the subnet broadcast of the address 172.56.5.245/22

Answer 6

The subnet is 172.56.4.0/22, the address range is from 172.56.4.1 to 172.56.7.254, and
the subnet broadcast is 172.56.7.255

Question 7

Which protocol can you use to configure a default gateway setting on a host

a.ARP
b.DHCP
c.DNS
d.RARP

Answer 7

B. DHCP configures the IP address, subnet mask, default gateway, and other optional
parameters

Question 8

How many host addresses are available with a Class B network with the default mask ?

a.63,998
b.64,000
c.65,534
d.65,536

Answer 8

216 − 2 = 65,534

Question 9

Which network and mask summarizes both the 192.170.20.16/30 and 192.170.20.20/30 networks?

a.192.170.20.0/24
b.192.170.20.20/28
c.192.170.20.16/29
d.192.170.20.0/30

Answer 9

c.192.170.20.16/29

Question 10

Which AF class is backward compatible with flash traffic of the IP precedence bits?

a.AF2
b.AF3
c.AF4
d.EF

Answer 10

b.AF3

Question 11

Which of the following is true about fragmentation?

a.Routers between source and destination hosts can fragment IPv4 packets.
b.Only the first router in the network can fragment IPv4 packets.
c.IPv4 packets cannot be fragmented.
d.IPv4 packets are fragmented and reassembled at each link through the network.

Answer 11

A. IPv4 packets can be fragmented by the sending host and routers.

Question 12

What are three types of IPv4 addresses? (Choose three.)

a.Anycast
b.Multicast
c.Dynamic
d.Broadcast
e.Unicast
f.Global
g.Static

Answer 12

B, D, and E. The three types of IPv4 address are unicast, broadcast, and multicast.

Question 13

How many hosts can be addressed with the IPv4 subnet 172.30.192.240/28?

a.6
b.14
c.126
d.1024

Answer 13

B. There are 4 bits to determine the number of host addresses: 24 − 2 = 16 − 2 = 14

Question 14

What is the smallest subnet and mask that can be used in a DMZ network that needs to have only three hosts?

a.192.168.10.32/30
b.192.168.10.32/29
c.192.168.10.32/28
d.192.168.10.32/27

Answer 14

b.192.168.10.32/29

Question 15

Which of the following is the European RIR?

a.IANA
b.ARIN
c.RIPE
d.ERIR

Answer 15

c.RIPE

Question 16

Which technology allows you to divide address blocks into subnets of different sizes?

a.NAT
b.VLSM
c.PAT
d.Variable division subnet masking

Answer 16

b.VLSM

Question 17

In what subnet does 172.16.45.227/27 reside?

a.172.16.45.128
b.172.16.45. 192
c.172.16.45.224
d.172.16.45.0

Answer 17

c.172.16.45.224

Question 18

When packets are fragmented at the network layer, where are the fragments reassembled?

Answer 18

The IP layer in the destination host

Question 19

True or false: Upper-layer protocols are identified in the IP header’s Protocol field. TCP is protocol 6, and UDP is protocol 17.

Answer 19

True