CCNA 1 Chapter 9 V5.0 Answers
1. How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?
510
512
1022
1024
2046
2048
2. How many usable host addresses are there in the subnet 192.168.1.32/27?
32
30
64
16
62
3. What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?
2001:DB8:BC15::0
2001:DB8:BC15:A::0
2001:DB8:BC15:A:1::1
2001:DB8:BC15:A:12::0
4. In a network that uses IPv4, what prefix would best fit a subnet containing 100 hosts?
/23
/24
/25
/26
5.
Refer to the exhibit. A computer that is configured with the IPv6 address as shown in the exhibit is unable to access the internet. What is the problem?
The DNS address is wrong.
There should not be an alternative DNS address.
The gateway address is in the wrong subnet.
The settings were not validated.
6. Fill in the blank.
In dotted decimal notation, the subnet mask...255.255.254.0...will accommodate 500 hosts per subnet.
7. When developing an IP addressing scheme for an enterprise network, which devices are recommended to be grouped into their own subnet or logical addressing group?
end-user clients
workstation clients
mobile and laptop hosts
hosts accessible from the Internet
8.
Refer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?
IP address: 192.168.10.65 subnet mask: 255.255.255.240, default gateway: 192.168.10.76
IP address: 192.168.10.38 subnet mask: 255.255.255.240, default gateway: 192.168.10.33
IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33
IP address: 192.168.10.41 subnet mask: 255.255.255.248, default gateway: 192.168.10.46
IP address: 192.168.10.254 subnet mask: 255.255.255.0, default gateway: 192.168.10.1
9. When subnetting a /64 IPv6 network prefix, which is the preferred new prefix length?
/66
/70
/72
/74
10. Fill in the blank.
In dotted decimal notation, the IP address...172.25.0.126...is the last host address for the network 172.25.0.64/26.
11. Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)
It eliminates most address configuration errors.
It ensures that addresses are only applied to devices that require a permanent address.
It guarantees that every device that needs an address will get one.
It provides an address only to devices that are authorized to be connected to the network.
It reduces the burden on network support staff.
12. Which two notations are useable nibble boundaries when subnetting in IPv6? (Choose two.)
/62
/64
/66
/68
/70
13. A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.248. How many host addresses will this subnet provide?
4
6
8
10
12
14. A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?
random static addresses to improve security
addresses from different subnets for redundancy
predictable static IP addresses for easier identification
dynamic addresses to reduce the probability of duplicate addresses
15.
Subnet 192.168.1.32/27 will have a valid host range from 192.168.1.33 - 192.168.1.62 with the broadcast address as 192.168.1.63
Subnet 192.168.1.64/27 will have a valid host range from 192.168.1.65 - 192.168.1.94 with the broadcast address as 192.168.1.95
Subnet 192.168.1.96/27 will have a valid host range from 192.168.1.97 - 192.168.1.126 with the broadcast address as 192.168.1.127
16.
Refer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?
255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
17. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What issue is causing Host A to be unable to communicate with Host B?
The subnet mask of host A is incorrect.
Host A has an incorrect default gateway.
Host A and host B are on overlapping subnets.
The IP address of host B is not in the same subnet as the default gateway is on.
18.
Network A needs to use 192.168.0.0 /25 which yields 128 host addresses.
Network B needs to use 192.168.0.128 /26 which yields 64 host addresses.
Network C needs to use 192.168.0.192 /27 which yields 32 host addresses.
Network D needs to use 192.168.0.224 /30 which yields 4 host addresses.
19.
Refer to the exhibit.
Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many total host addresses are unused in the assigned subnets?
56
60
64
68
72
20. A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.)
192.168.1.16/28
192.168.1.64/27
192.168.1.128/27
192.168.1.96/28
192.168.1.192/28
21. How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?
two
three
four
five
22. Consider the following range of addresses:
2001:0DB8:BC15:00A0:0000::
2001:0DB8:BC15:00A1:0000::
2001:0DB8:BC15:00A2:0000::
...
2001:0DB8:BC15:00AF:0000::
The prefix-length for the range of addresses is.../60
23. Fill in the blank.
A nibble consists of...4..bits
24.
Refer to the exhibit. How many broadcast domains are there?
1
2
3
4
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