Module 4.0 Configuring Network
Addressing – Quiz. Questions with
Correct Verified Answers. Latest 2026-
2027. Graded A
A 26-bit mask provides a range of 64 IP addresses (2^6), with 62 host
addresses. A subnet with "/26" CIDR notation reserves one address for the
network and one for broadcast, leaving 62 addresses available. The subnet
mask for a "/26" network is 255.255.255.192. - AnsThe following are Class
B addresses: 129.0.0.0, 132.12.0.0, and 190.65.2.0.
The first octet of a Class B address is in the range of 128 to 191.
A company is planning to reorganize its network infrastructure to improve
efficiency and reduce the complexity of its routing tables. They currently
have eight /24 networks that are contiguous. The network administrator
suggests using CIDR to summarize these networks into a single entry.
What CIDR notation would achieve this? - AnsA /21 CIDR notation can
summarize eight contiguous /24 networks into a single network. This is
because a /21 network encompasses 2^11 = 2048 addresses, and since
each /24 network represents 256 addresses, eight of them would total 2048
addresses. This summarization significantly simplifies the routing table by
reducing eight entries to just one.
A DevOps engineer, is configuring network settings on a fleet of virtual
machines (VMs) that are part of a cloud-based application deployment.
1
,These VMs are running on a modern Linux distribution that utilizes the
iproute2 package for network management.
The engineer needs to ensure that each VM can communicate with the
others within the same subnet. To do this, the engineer decides to verify
the operational status of the network interfaces on one of the VMs to
ensure they are active (up) and correctly configured before proceeding with
further network connectivity tests.
Given the engineer's goal, which command should she use to check the
operational status and configuration of the network interfaces on a VM? -
AnsThe ip link show command is the most appropriate for the engineer's
needs because it displays detailed information about each network
interface, including its operational status (up or down) and MAC address,
among other details. This command allows the engineer to quickly verify
that the network interfaces are active and ready for communication, which
is crucial for the VMs to interact within the same subnet.
A host has an address of 100.55.177.99/16. Which of the following is the
broadcast address for the subnet? - Ansaddress uses 16 bits in the subnet
mask (255.255.0.0), meaning that the first two octets indicate the subnet
address (100.55.0.0), and the last two octets are used for host addresses.
The last possible address on this subnet is 100.55.255.255.
A network administrator is redesigning a small office network that currently
uses a single /24 subnet but wants to implement VLSM to optimize IP
address usage.
2
, The office has four departments with the following IP address needs:
Admin (10 IP addresses), Development (40 IP addresses), Marketing (20
IP addresses), and Support (30 IP addresses).
What is the most efficient VLSM design that the administrator can
implement? - AnsThe correct answer is /28 for Admin, /26 for Development,
/27 for Marketing, and /26 for Support. The Admin department needs 10 IP
addresses, which can be accommodated by a /28 subnet (16 addresses).
The Development department requires 40 IP addresses, fitting within a /26
subnet (64 addresses). The Marketing department's 20 IP addresses can
be served by a /27 subnet (32 addresses), and the Support department's
30 IP addresses can also be accommodated by a /26 subnet (64
addresses), providing room for growth.
A network administrator is troubleshooting a network issue in a multi-
interface device that operates both an Ethernet and a Wi-Fi connection.
The administrator discovers that despite both interfaces having a valid IPv6
link local address, there seems to be confusion about where packets
should be routed for local network operations.
What should the administrator check to resolve this issue? - AnsThe
correct answer is to check the zone indices appended to the link local
addresses. In a multi-interface device, each interface's link local address is
appended with a zone index to specify the particular network interface for
packet routing. The administrator should check the zone indices to ensure
they are correctly assigned and used, resolving the confusion about packet
routing for local network operations.
3
Addressing – Quiz. Questions with
Correct Verified Answers. Latest 2026-
2027. Graded A
A 26-bit mask provides a range of 64 IP addresses (2^6), with 62 host
addresses. A subnet with "/26" CIDR notation reserves one address for the
network and one for broadcast, leaving 62 addresses available. The subnet
mask for a "/26" network is 255.255.255.192. - AnsThe following are Class
B addresses: 129.0.0.0, 132.12.0.0, and 190.65.2.0.
The first octet of a Class B address is in the range of 128 to 191.
A company is planning to reorganize its network infrastructure to improve
efficiency and reduce the complexity of its routing tables. They currently
have eight /24 networks that are contiguous. The network administrator
suggests using CIDR to summarize these networks into a single entry.
What CIDR notation would achieve this? - AnsA /21 CIDR notation can
summarize eight contiguous /24 networks into a single network. This is
because a /21 network encompasses 2^11 = 2048 addresses, and since
each /24 network represents 256 addresses, eight of them would total 2048
addresses. This summarization significantly simplifies the routing table by
reducing eight entries to just one.
A DevOps engineer, is configuring network settings on a fleet of virtual
machines (VMs) that are part of a cloud-based application deployment.
1
,These VMs are running on a modern Linux distribution that utilizes the
iproute2 package for network management.
The engineer needs to ensure that each VM can communicate with the
others within the same subnet. To do this, the engineer decides to verify
the operational status of the network interfaces on one of the VMs to
ensure they are active (up) and correctly configured before proceeding with
further network connectivity tests.
Given the engineer's goal, which command should she use to check the
operational status and configuration of the network interfaces on a VM? -
AnsThe ip link show command is the most appropriate for the engineer's
needs because it displays detailed information about each network
interface, including its operational status (up or down) and MAC address,
among other details. This command allows the engineer to quickly verify
that the network interfaces are active and ready for communication, which
is crucial for the VMs to interact within the same subnet.
A host has an address of 100.55.177.99/16. Which of the following is the
broadcast address for the subnet? - Ansaddress uses 16 bits in the subnet
mask (255.255.0.0), meaning that the first two octets indicate the subnet
address (100.55.0.0), and the last two octets are used for host addresses.
The last possible address on this subnet is 100.55.255.255.
A network administrator is redesigning a small office network that currently
uses a single /24 subnet but wants to implement VLSM to optimize IP
address usage.
2
, The office has four departments with the following IP address needs:
Admin (10 IP addresses), Development (40 IP addresses), Marketing (20
IP addresses), and Support (30 IP addresses).
What is the most efficient VLSM design that the administrator can
implement? - AnsThe correct answer is /28 for Admin, /26 for Development,
/27 for Marketing, and /26 for Support. The Admin department needs 10 IP
addresses, which can be accommodated by a /28 subnet (16 addresses).
The Development department requires 40 IP addresses, fitting within a /26
subnet (64 addresses). The Marketing department's 20 IP addresses can
be served by a /27 subnet (32 addresses), and the Support department's
30 IP addresses can also be accommodated by a /26 subnet (64
addresses), providing room for growth.
A network administrator is troubleshooting a network issue in a multi-
interface device that operates both an Ethernet and a Wi-Fi connection.
The administrator discovers that despite both interfaces having a valid IPv6
link local address, there seems to be confusion about where packets
should be routed for local network operations.
What should the administrator check to resolve this issue? - AnsThe
correct answer is to check the zone indices appended to the link local
addresses. In a multi-interface device, each interface's link local address is
appended with a zone index to specify the particular network interface for
packet routing. The administrator should check the zone indices to ensure
they are correctly assigned and used, resolving the confusion about packet
routing for local network operations.
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