Question 1

Lexa has been asked for the subnet ID and subnet mask in CIDR notation for one of the web servers in the company's private cloud. The web server has an IP address of 192.168.1.200 and a subnet mask of 255.255.255.192. What should she tell them?
A) 192.168.1.128/25
B) 192.168.1.192/26
C) 192.168.1.192/27
D) 192.168.1.128/26

Accepted Answer

The subnet mask 255.255.255.192 in binary is 11111111.11111111.11111111.11000000, which corresponds to a /26 CIDR notation. The subnet ID is the first address in the subnet, which for the 192.168.1.200 IP address with a /26 mask is 192.168.1.192.

Question 2

Bellamy has been asked to configure the virtual router interface for the subnetwork that contains the server with IP address 172.19.101.200 and subnet mask of 255.255.255.128. He is asked to use the first usable IP address of the subnet. Which of the following IP addresses should he use?
A) 172.19.101.128
B) 172.19.101.129
C) 172.19.101.192
D) 172.19.101.193

Accepted Answer

The subnet mask 255.255.255.128 indicates a subnet with 128 addresses, where the network address is the first IP in the range and the first usable IP is the next one. The IP 172.19.101.200 falls within the 172.19.101.128 - 172.19.101.255 range, making 172.19.101.128 the network address and 172.19.101.129 the first usable IP address.

Question 3

Octavia has set up a private cloud with a virtual machine at the IP address 172.19.101.5 and the subnet mask 255.255.255.192. She has been asked what the broadcast IP address is for the network. How should she respond?
A) 172.19.101.255
B) 172.19.101.127
C) 172.19.101.31
D) 172.19.101.63

Accepted Answer

The subnet mask 255.255.255.192 corresponds to a /26 CIDR notation, which means the network is divided into blocks of 64 IP addresses (0-63, 64-127, etc.). Given the IP address 172.19.101.5 falls within the first block (0-63), the broadcast address, which is the last address in the block, is 172.19.101.63.

Question 4

Hershel is working with a virtual network that has the subnet mask 255.255.255.192. He changes the IP address of one of the servers from 172.16.25.183 to 172.16.25.193. What is the result of this change?
A) The server will no longer be able to communicate with the devices on the subnetwork that it was previously in without the aid of a router.
B) The server will no longer be able to communicate with the devices on the subnetwork that it was previously in without the aid of a switch.
C) The server will no longer be able to communicate with the devices on the subnetwork that it was previously in without the aid of a DNS server.
D) The server will still be able to communicate with the devices on the subnetwork that it was previously in without the aid of any other devices or servers.

Accepted Answer

The subnet mask 255.255.255.192 indicates a block size of 64 IP addresses per subnet. The IP address 172.16.25.183 belongs to the subnet 172.16.25.128/26, while 172.16.25.193 belongs to the next subnet 172.16.25.192/26. Therefore, the server has moved to a different subnet and will require a router to communicate with devices on the previous subnet.

Question 5

Clarke is trying to come up with a subnet mask so that three servers with the IP addresses 172.16.31.10, 172.16.30.15, and 172.16.31.206 are in the same network. Which of the following subnet masks will accommodate this requirement?
A) 255.255.255.0
B) 255.255.255.128
C) 255.255.255.192
D) 255.255.254.0

Accepted Answer

The subnet mask 255.255.254.0 (option D) allows for the IP addresses 172.16.31.10, 172.16.30.15, and 172.16.31.206 to be in the same subnet. This mask provides for a range from 172.16.30.0 to 172.16.31.255, encompassing all three addresses.

Question 6

Finn needs to create multiple virtual networks using a /28 mask. How many devices can he put on each subnet?
A) 16
B) 14
C) 30
D) 32

Accepted Answer

A /28 mask leaves 4 bits for host addresses. The formula for calculating the number of hosts in a subnet is 2^n - 2, where n is the number of host bits. Therefore, 2^4 - 2 = 14.

Question 7

Raven has been asked to configure the web server with a specific public class B IP address. Which of the following is a possible address she was given?
A) 168.192.10.172
B) 192.165.10.172
C) 172.16.172.16
D) 127.192.168.172

Accepted Answer

Class B IP addresses range from 128.0.0.0 to 191.255.255.255. The address 168.192.10.172 falls within this range.

Question 8

Jasper was given the IP address of 10.17.101.120/15 for the virtual machine he is to create along with the default gateway of 10.0.0.1. He enters the IP address correctly along with the subnet mask 255.254.0.0. However, the virtual machine doesn't appear to be able to communicate with the Internet when he tries to ping a popular domain name. Which of the following might be the reason why?
A) The subnet mask is incorrect.
B) There is no route in the routing table.
C) The firewall is blocking the traffic.
D) The default gateway is incorrect.

Accepted Answer

The default gateway of 10.0.0.1 is not in the same subnet as the IP address 10.17.101.120 with a subnet mask of 255.254.0.0. For communication to occur, the default gateway must be in the same subnet as the device.

Question 9

Thelonius has just created a new virtual machine. By default, the cloud service provider automatically configured it as part of a class C private network. Which of the following is the default subnet mask expressed in CIDR notation that was configured?
A) /8
B) /16
C) /24
D) /32

Accepted Answer

Class C private networks use a default subnet mask of 255.255.255.0, which is equivalent to /24 in CIDR notation.

Question 10

Abby has just created a new virtual machine. Once it has been installed, she connects to it and finds that it has configured the default subnet mask for a class A network. Which of the following subnet masks was automatically configured for this server?
A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) 255.255.255.255

Accepted Answer

The default subnet mask for a Class A network is 255.0.0.0.

Question 11

Marcus has been asked to configure a web server with a specific private class C IP address. Which of the following is a possible address she was given?
A) 172.168.100.10
B) 200.100.50.25
C) 192.168.205.63
D) 192.158.1.70

Accepted Answer

Class C private IP addresses range from 192.168.0.0 to 192.168.255.255. Option C falls within this range, making it a valid Class C private IP address.

Quiz 4: Cloud Infrastructure

Lexa has been asked for the subnet ID and subnet mask in CIDR notation for one of the web servers in the company's private cloud. The web server has an IP address of 192.168.1.200 and a subnet mask of 255.255.255.192. What should she tell them?

Bellamy has been asked to configure the virtual router interface for the subnetwork that contains the server with IP address 172.19.101.200 and subnet mask of 255.255.255.128. He is asked to use the first usable IP address of the subnet. Which of the following IP addresses should he use?

Octavia has set up a private cloud with a virtual machine at the IP address 172.19.101.5 and the subnet mask 255.255.255.192. She has been asked what the broadcast IP address is for the network. How should she respond?

Hershel is working with a virtual network that has the subnet mask 255.255.255.192. He changes the IP address of one of the servers from 172.16.25.183 to 172.16.25.193. What is the result of this change?

Clarke is trying to come up with a subnet mask so that three servers with the IP addresses 172.16.31.10, 172.16.30.15, and 172.16.31.206 are in the same network. Which of the following subnet masks will accommodate this requirement?

Finn needs to create multiple virtual networks using a /28 mask. How many devices can he put on each subnet?

Raven has been asked to configure the web server with a specific public class B IP address. Which of the following is a possible address she was given?

Thelonius has just created a new virtual machine. By default, the cloud service provider automatically configured it as part of a class C private network. Which of the following is the default subnet mask expressed in CIDR notation that was configured?

Abby has just created a new virtual machine. Once it has been installed, she connects to it and finds that it has configured the default subnet mask for a class A network. Which of the following subnet masks was automatically configured for this server?

Marcus has been asked to configure a web server with a specific private class C IP address. Which of the following is a possible address she was given?