Q. How many subnets can be created from a /24 network if 3 bits are borrowed for subnetting?
Solution
Borrowing 3 bits from a /24 network allows for 2^3 = 8 subnets.
Correct Answer:
B
— 8
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Q. In CIDR notation, what does /24 represent?
-
A.
255.255.255.0 subnet mask
-
B.
256 IP addresses
-
C.
24 hosts per subnet
-
D.
24 bits for the host portion
Solution
CIDR notation /24 indicates that the first 24 bits of the subnet mask are set to 1, which corresponds to a subnet mask of 255.255.255.0.
Correct Answer:
A
— 255.255.255.0 subnet mask
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Q. In IPv6, what is the equivalent of a subnet mask?
-
A.
Prefix length
-
B.
CIDR notation
-
C.
Subnet identifier
-
D.
Network address
Solution
In IPv6, the prefix length indicates the number of bits used for the network portion, similar to a subnet mask in IPv4.
Correct Answer:
A
— Prefix length
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Q. What does the term 'supernetting' refer to?
-
A.
Combining multiple subnets into a larger network
-
B.
Dividing a network into smaller subnets
-
C.
A method of IP address allocation
-
D.
A type of routing protocol
Solution
Supernetting is the process of aggregating multiple contiguous subnets into a single larger network to simplify routing.
Correct Answer:
A
— Combining multiple subnets into a larger network
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Q. What is the maximum number of hosts that can be addressed in a /26 subnet?
-
A.
62
-
B.
64
-
C.
126
-
D.
128
Solution
A /26 subnet has 64 IP addresses, but 2 are reserved (network and broadcast), leaving 62 usable host addresses.
Correct Answer:
A
— 62
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Q. What is the primary function of a default gateway in a subnet?
-
A.
To route traffic within the subnet
-
B.
To connect to the internet
-
C.
To provide DHCP services
-
D.
To manage IP address assignments
Solution
The default gateway is used to route traffic from a local subnet to destinations outside that subnet, typically to the internet.
Correct Answer:
B
— To connect to the internet
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Q. What is the purpose of the subnet mask in IP addressing?
-
A.
To identify the network and host portions of an IP address
-
B.
To encrypt data packets
-
C.
To assign IP addresses dynamically
-
D.
To manage routing tables
Solution
The subnet mask determines which part of an IP address refers to the network and which part refers to the host.
Correct Answer:
A
— To identify the network and host portions of an IP address
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Q. What is the purpose of the subnetting process?
-
A.
To create more broadcast domains
-
B.
To reduce the size of routing tables
-
C.
To enhance security and performance
-
D.
All of the above
Solution
Subnetting helps create more broadcast domains, reduces routing table size, and enhances security and performance.
Correct Answer:
D
— All of the above
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Q. What is the subnet mask for the IP address 172.16.5.10 if it is part of a /20 network?
-
A.
255.255.240.0
-
B.
255.255.255.0
-
C.
255.255.0.0
-
D.
255.255.255.240
Solution
A /20 subnet mask corresponds to 255.255.240.0, allowing for 4096 addresses in the subnet.
Correct Answer:
A
— 255.255.240.0
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Q. Which protocol is commonly used for dynamic IP address allocation?
-
A.
ARP
-
B.
RARP
-
C.
DHCP
-
D.
ICMP
Solution
DHCP (Dynamic Host Configuration Protocol) is used to dynamically assign IP addresses to devices on a network.
Correct Answer:
C
— DHCP
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