CCNA1 v5.1 Chapter 7 Exam Answers

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1. How many bits are in an IPv4 address?

32*

64

128

256

2. Which two parts are components of an IPv4 address? (Choose two.)

subnet portion

network portion*

logical portion

host portion*

physical portion

broadcast portion

3. What does the IP address 172.17.4.250/24 represent?

network address

multicast address

host address*

broadcast address

4. What is the purpose of the subnet mask in conjunction with an IP address?

to uniquely identify a host on a network

to identify whether the address is public or private

to determine the subnet to which the host belongs*

to mask the IP address to outsiders

5. What subnet mask is represented by the slash notation /20?

255.255.255.248

255.255.224.0

255.255.240.0*

255.255.255.0

255.255.255.192

6. A message is sent to all hosts on a remote network. Which type of message is it?

limited broadcast

multicast

directed broadcast*

unicast

7. What are three characteristics of multicast transmission? (Choose three.)

The source address of a multicast transmission is in the range of 224.0.0.0 to 224.0.0.255.

A single packet can be sent to a group of hosts.*

Multicast transmission can be used by routers to exchange routing information.*

The range of 224.0.0.0 to 224.0.0.255 is reserved to reach multicast groups on a local network.*

Computers use multicast transmission to request IPv4 addresses.

Multicast messages map lower layer addresses to upper layer addresses.

8. Which three IP addresses are private ? (Choose three.)

10.1.1.1*

172.32.5.2

192.167.10.10

172.16.4.4*

192.168.5.5*

224.6.6.6

9. Which two IPv4 to IPv6 transition techniques manage the interconnection of IPv6 domains? (Choose two.)

trunking

dual stack*

encapsulation

tunneling*

multiplexing

10. Which of these addresses is the shortest abbreviation for the IP address:

3FFE : 1044 : 0000 : 0000 : 00AB : 0000 : 0000 : 0057?

3FFE : 1044 :: AB :: 57

3FFE : 1044 :: 00AB :: 0057

3FFE : 1044 : 0 : 0 : AB :: 57*

3FFE : 1044 : 0 : 0 : 00AB :: 0057

3FFE : 1044 : 0000 : 0000 : 00AB :: 57

3FFE : 1044 : 0000 : 0000 : 00AB :: 0057

11. What type of address is automatically assigned to an interface when IPv6 is enabled on that interface?

global unicast

link-local*

loopback

unique local

12. What are two types of IPv6 unicast addresses? (Choose two.)

multicast

loopback*

link-local*

anycast

broadcast

13. What are three parts of an IPv6 global unicast address? (Choose three.)

an interface ID that is used to identify the local network for a particular host

a global routing prefix that is used to identify the network portion of the address that has been provided by an ISP*

a subnet ID that is used to identify networks inside of the local enterprise site*

a global routing prefix that is used to identify the portion of the network address provided by a local administrator

an interface ID that is used to identify the local host on the network*

14. An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured?

SLAAC

stateless DHCPv6*

stateful DHCPv6

RA and EUI-64

15. Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host?

ARPv6

DHCPv6

ICMPv6*

UDP

16. Which two things can be determined by using the ping command? (Choose two.)

the number of routers between the source and destination device

the IP address of the router nearest the destination device

the average time it takes a packet to reach the destination and for the response to return to the source*

the destination device is reachable through the network*

the average time it takes each router in the path between source and destination to respond

17. What is the purpose of ICMP messages?

to inform routers about network topology changes

to ensure the delivery of an IP packet

to provide feedback of IP packet transmissions*

to monitor the process of a domain name to IP address resolution

18. What is indicated by a successful ping to the ::1 IPv6 address?

The host is cabled properly.

The default gateway address is correctly configured.

All hosts on the local link are available.

The link-local address is correctly configured.

IP is properly installed on the host.*

19. A user is executing a tracert to a remote device. At what point would a router, which is in the path to the destination device, stop forwarding the packet?

when the router receives an ICMP Time Exceeded message

when the RTT value reaches zero

when the host responds with an ICMP Echo Reply message

when the value in the TTL field reaches zero*

when the values of both the Echo Request and Echo Reply messages reach zero

20. What field content is used by ICMPv6 to determine that a packet has expired?

TTL field

CRC field

Hop Limit field*

Time Exceeded field

21. Fill in the blank.

The decimal equivalent of the binary number 10010101 is __149__ .

22. Fill in the blank.

The binary equivalent of the decimal number 232 is __11101000__.

23. Fill in the blank.

What is the decimal equivalent of the hex number 0x3F? __63__

24. Match each description with an appropriate IP address. (Not all options are used.)

169.254.1.5 -> a link-local address
192.0.2.123 -> a TEST-NET address
240.2.6.255 -> an experimental address
172.19.20.5 -> a private address
127.0.0.1 -> a loopback address