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Classless Addressing in networking primarily solves which issue?
a. Address completion
b. Address depletion
c. Address redundancy
d. Address fragmentation
Answer: b. Address depletionsanfoundry
What does the ‘n’ in a classless address like 192.168.1.0/n represent?
a. Suffix length
b. Prefix length
c. Host length
d. Octet length
Answer: b. Prefix lengthsanfoundry
Which of the following values can ‘n’ not take in classless addressing?
a. 8
b. 16
c. 20
d. 31
Answer: d. 31sanfoundry
In classless addressing, addresses must be:
a. Random
b. Contiguous
c. Divisible by 10
d. Private
Answer: b. Contiguoussanfoundry
Which format is used to represent CIDR addresses?
a. Decimal notation
b. Hexadecimal notation
c. IP_address/prefix_length
d. IP_address:port
Answer: c. IP_address/prefix_lengthgeeksforgeeks+1
In CIDR, what does the prefix length denote?
a. Number of host bits
b. Number of network bits
c. Number of subnet bits
d. Number of total IPs
Answer: b. Number of network bitstestbook+2
Which of these allows allocation of IP addresses in variable sized blocks?
a. Classful addressing
b. Classless addressing (CIDR)
c. Flat addressing
d. Hierarchical addressing
Answer: b. Classless addressing (CIDR)geeksforgeeks+1
If an IP block is 192.168.1.0/24, how many host addresses are available?
a. 128
b. 256
c. 512
d. 1024
Answer: b. 256testbook+1
The main advantage of classless addressing over classful is:
a. Simpler routing tables
b. More efficient use of address space
c. Larger subnets
d. Longer IP addresses
Answer: b. More efficient use of address spacegeeksforgeeks
What does VLSM stand for in the context of classless networking?
a. Variable Layer Switching Mechanism
b. Variable Length Subnet Masking
c. Virtual Local Switching Module
d. Verified Logical Subnet Management
Answer: b. Variable Length Subnet Maskingtestbook
What is the first address in a CIDR block called?
a. Broadcast address
b. Network address
c. Host address
d. Gateway address
Answer: b. Network addressedurev
If given 10.0.0.0/22, what is the total number of IP addresses in this block?
a. 255
b. 512
c. 1024
d. 2048
Answer: c. 1024testbook
In classless addressing, what does the term ‘netid’ refer to?
a. Last bits of address
b. Common prefix of the block
c. Suffix portion
d. Address length
Answer: b. Common prefix of the blockcliffsnotes
What is the notation that separates block size in CIDR?
a. Colon
b. Slash
c. Hyphen
d. Period
Answer: b. Slashedurev+1
Which layer of the OSI model handles logical addressing such as CIDR?
a. Data Link
b. Physical
c. Network
d. Application
Answer: c. Networkgeeksforgeeks
The last address in a classless block is known as:
a. Network address
b. Host address
c. Broadcast address
d. Subnet address
Answer: c. Broadcast addressedurev+1
Which organization currently allocates classless addresses?
a. W3C
b. IANA
c. IEEE
d. ISO
Answer: b. IANAgeeksforgeeks
In classless addressing, why must the block size be a power of 2?
a. For easier routing
b. For divisibility
c. To reduce waste
d. For configuration simplicity
Answer: a. For easier routinggeeksforgeeks
Which of these is not supported in classless addressing?
a. Fixed block sizes
b. Variable block sizes
c. Route aggregation
d. Address summarization
Answer: a. Fixed block sizestestbook
Which protocol supports classless routing?
a. RIP version 1
b. OSPF
c. EIGRP
d. Both b and c
Answer: d. Both b and cnwkings
To subnet an IP address using CIDR, which portion changes for hosts?
a. Prefix bits
b. Suffix/host bits
c. All bits
d. Top octet
Answer: b. Suffix/host bitsexamradar
CIDR contributed to reducing which of these?
a. Network latency
b. Routing table size
c. Subnet mask length
d. Address duplication
Answer: b. Routing table sizegeeksforgeeks
Which is the decimal equivalent of the network mask /28?
a. 255.255.255.192
b. 255.255.255.224
c. 255.255.255.240
d. 255.255.255.248
Answer: c. 255.255.255.240edurev
A single address in CIDR notation is represented as:
a. /8
b. /16
c. /32
d. /24
Answer: c. /32edurev
What is the smallest block possible with CIDR?
a. 1 address
b. 2 addresses
c. 4 addresses
d. 8 addresses
Answer: a. 1 addressedurev
Which of the following is true about CIDR blocks?
a. All addresses are random
b. All are contiguous
c. All are public addresses
d. All are divided by 10
Answer: b. All are contiguousgeeksforgeeks
The term “supernetting” refers to:
a. Splitting blocks into smaller subnets
b. Combining blocks to make larger ones
c. Routing between subnetworks
d. Dividing blocks equally
Answer: b. Combining blocks to make larger onesscribd
If a company requires 2^10^ addresses, how should CIDR be used?
a. Buy a class A block
b. Use a /22 block
c. Use a /16 block
d. Use a /24 block
Answer: b. Use a /22 blocktestbook+1
What is the main purpose of subnetting with CIDR?
a. Increase network size
b. Minimize address waste
c. Improve latency
d. Simplify management
Answer: b. Minimize address wastegeeksforgeeks
Which of the following accurately describes classless routing protocols?
a. Do not advertise subnet masks
b. Advertise subnet masks
c. Advertise only default routes
d. Use only class A addresses
Answer: b. Advertise subnet masksnwkings
In classless addressing, what happens when a router receives an IP address without a subnet mask?
a. Assumes default class mask
b. Rejects the address
c. Assigns /32 mask
d. None of the above
Answer: a. Assumes default class masknwkings+1
In the block 172.16.0.0/12, how many possible host addresses are available?
a. 16,384
b. 4,096
c. 65,536
d. 1,024
Answer: a. 1,048,576 (found by 2^(32-12), but common IPv4 blocks use smaller sizes)testbook
Which is the leading bit pattern for Classless addressing?
a. 110
b. Varies based on prefix
c. 100
d. 101
Answer: b. Varies based on prefixedurev
Which of these is most closely related to classless addressing?
a. IPv4 only
b. IPv6 only
c. Both IPv4 and IPv6
d. ARP protocol
Answer: c. Both IPv4 and IPv6studocu
Which notation is used to describe the range in classless addressing?
a. Dotted decimal
b. Slash notation
c. Mask notation
d. Hyphenated notation
Answer: b. Slash notationedurev+1
What is meant by route aggregation in CIDR?
a. Combining multiple network routes as a single route
b. Dividing routes by class
c. Assigning individual routes for each network
d. Excluding private addresses
Answer: a. Combining multiple network routes as a single routegeeksforgeeks
What is a practical outcome of route aggregation?
a. Smaller routing tables
b. Lower throughput
c. Frequent fragmentation
d. Loss of packets
Answer: a. Smaller routing tablesgeeksforgeeks
What type of subnet mask can classless protocols support?
a. Only /8
b. Only /24
c. Any length
d. /32 only
Answer: c. Any lengthsanfoundry+1
Which devices most commonly use classless addressing?
a. Switches
b. Routers
c. Hubs
d. Repeaters
Answer: b. Routerssanfoundry
Which of these is most susceptible to address waste?
a. Classful addressing
b. CIDR
c. Dynamic addressing
d. Virtual networking
Answer: a. Classful addressinggeeksforgeeks
CIDR supports which type of routing?
a. Flat
b. Hierarchical
c. Both flat and hierarchical
d. Static only
Answer: b. Hierarchicaledurev
Which notation is correct for a block starting at 192.0.2.0 with a prefix length of 28?
a. 192.0.2.0-28
b. 192.0.2.0/28
c. 192.0.2.0_28
d. 192.0.2.0:28
Answer: b. 192.0.2.0/28edurev+1
What does subnetting a CIDR block create?
a. Multiple broadcast domains
b. Multiple smaller blocks
c. Multiple collision domains
d. Larger ranges
Answer: b. Multiple smaller blocksscribd+1
The main disadvantage of classless addressing is:
a. Complexity in calculation
b. Larger waste
c. Incompatibility with IPv6
d. No aggregation possible
Answer: a. Complexity in calculationgeeksforgeeks
How does CIDR relate to supernetting?
a. CIDR does not allow supernetting
b. CIDR allows combining blocks into bigger blocks
c. CIDR only splits blocks
d. CIDR uses classful rules
Answer: b. CIDR allows combining blocks into bigger blocksscribd
All addresses in a CIDR block share a common:
a. Hostid
b. Prefix
c. Suffix
d. Domain name
Answer: b. Prefixcliffsnotes+1
Which protocol does NOT support classless routing?
a. RIP v1
b. OSPF
c. EIGRP
d. BGP
Answer: a. RIP v1nwkings
For the address range 10.0.0.0/23, how many addresses are available?
a. 128
b. 256
c. 512
d. 1024
Answer: c. 512testbook
If an organization needs 1000 hosts, which CIDR block size should it request?
a. /22
b. /23
c. /24
d. /25
Answer: a. /22testbook+1
Which statement about classless addressing is INCORRECT?
a. Prefix length can be any value between 0 and 32
b. Blocks must always be a power of 2 in size
c. Addresses need not be contiguous
d. CIDR enables route aggregation
Answer: c. Addresses need not be contiguoustestbook+1

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