7&8. IPv4 Addressing

Question 1

What is the length of an IP address? (bits)

Answer 1

32 bits

Question 2

What are the groups of 8 bits in an IP address called?

Answer 2

octets

Question 3

What is the maximum value for a binary octet? (1111 1111)

Answer 3

255

Question 4

What is the numeric range of the first octet of a class A IPv4 address?

Answer 4

0-127

Question 5

What is the numeric range of the first octet of a class B IPv4 address?

Answer 5

128-191

Question 6

What is the numeric range of the first octet of a class C IPv4 address?

Answer 6

192-223

Question 7

What is the numeric range of the first octet of a class D IPv4 address?

Answer 7

224-239

Question 8

What is the numeric range of the first octet of a class E IPv4 address?

Answer 8

240-255

Question 9

What is the class D IPv4 address range reserved for?

Answer 9

Multicast Addresses

Question 10

IPv4 addresses beginning with 127 are used for […] addresses.

Answer 10

Loopback

Question 11

What kind of address is used to test the network software stack on the local device?

Answer 11

loopback addresses

Question 12

If the host portion of an IPv4 address is all 0s, what kind of address is it?

Answer 12

network address

Question 13

If the host portion of an IPv4 address is all 1s, what kind of address is it?

Answer 13

broadcast address

Question 14

Interfaces on Cisco [device type] are administratively down by default.

Answer 14

Routers

Question 15

What is the formula to calculate the max. number of hosts in a network?

Answer 15

(2^n)-2

n = number of host bits

Question 16

Which IPv4 address class contains a total of 128 networks?

Answer 16

Class A

Question 17

The ‘Status’ field of the show ip interface brief command shows the Layer […] status of the interface.

Answer 17

1

Question 17

The ‘Status’ field of the show ip interface brief command shows the Layer […] status of the interface.

Answer 17

1

Question 18

The ‘Protocol’ field of the show ip interface brief command shows the Layer […] status of the interface.

Answer 18

2

Question 19

Interfaces on Cisco [device type] are NOT administratively down by default.

Answer 19

switches

Question 20

Command to configure an IP address on an interface:

R1(config-if)# […]

Answer 20

ip address ip-address subnet-mask

ie.
ip address 192.168.1.254 255.255.255.0

Question 21

Command to configure a description on an interface:

R1(config-if)# […]

Answer 21

description description

ie.
R1(config-if)# description ## to SW1 ##

Question 22

Display the configured description of each interface on a router:
R1# […]

Answer 22

R1# show interface description