Match each networking concept to its most accurate role.
Drag a concept onto its matching description — or click a concept then click the description.
Defines network versus host portions of the address
Next hop used for off-subnet traffic
Local Layer 2 address for frame delivery
Data structure used to choose packet-forwarding paths
⚠ Common exam trap
Candidates often confuse multicast and anycast: multicast delivers to all members of a group, while anycast delivers to only the closest member. Also, broadcast is often mistakenly thought to be one-to-closest, but it is one-to-all.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Unicast: one-to-one communication
Unicast communication involves one-to-one transmission between a single sender and a single receiver. Broadcast is one-to-all communication, where a packet is sent to every device on the local subnet. Multicast is one-to-many communication, where a single sender transmits to a specific group of interested receivers. Anycast is one-to-one-of-many, where a packet is delivered to the nearest node among a group of potential receivers, typically used for services like DNS. The other options are incorrectly defined: Broadcast is not one-to-closest (that is anycast), Multicast is not one-to-all (that is broadcast), and Anycast is not one-to-group (that is multicast). Therefore, only option A is correctly matched.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Unicast: one-to-one communication
Why this is correct
Unicast delivers a single packet stream from one source host to one specific destination host, addressed by a unique IPv4 address. It is the fundamental model for client-server and peer-to-peer exchanges such as HTTP requests, where each receiver gets its own copy. Because the destination is a single interface, routers forward using the longest-prefix match to that precise address.
Broadcast: one-to-closest communication
Why it's wrong here
Broadcast transmits packets to every host on a local IPv4 subnet using the subnet-directed broadcast address (e.g., 192.168.1.255). It is inherently one-to-all within the L2 segment, not one-to-closest, which would require multiple identical addresses and routing to the nearest one (anycast). Routers typically do not forward broadcasts, and frequent broadcasts consume bandwidth and CPU.
When this WOULD be correct
In a question asking to match 'Broadcast' to its role in IPv4 addressing, where the correct role is 'one-to-all communication within a broadcast domain'.
Multicast: one-to-all communication
Why it's wrong here
Multicast sends a single copy of a packet to a specific group of interested receivers that have joined a multicast group, typically using IGMP. It is not one-to-all because hosts that have not subscribed never receive the traffic; broadcast, in contrast, floods the entire local subnet. Routers manage multicast distribution trees to avoid sending duplicates.
When this WOULD be correct
In a question asking 'Which communication method sends data from one source to all hosts on the network?', multicast would be wrong, but if the question were 'Which method sends data to a specific subset of hosts that have joined a group?', multicast would be correct.
Anycast: one-to-group communication
Why it's wrong here
Anycast assigns the same IPv4 address to multiple devices, but packets are delivered to the nearest (topologically closest) one, not to a group. If a packet were sent to a group, that would be multicast, which replicates to all subscribed members. Anycast is used in DNS root servers and CDNs to direct traffic to the optimal node.
When this WOULD be correct
A question that asks: 'Which communication type sends packets to the nearest member of a group, often used for DNS or CDN services?' Then anycast (one-to-nearest) would be correct.
Option-by-option analysis
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
Why this is correct
Unicast delivers a single packet stream from one source host to one specific destination host, addressed by a unique IPv4 address. It is the fundamental model for client-server and peer-to-peer exchanges such as HTTP requests, where each receiver gets its own copy. Because the destination is a single interface, routers forward using the longest-prefix match to that precise address.
Why this is wrong here
Broadcast is one-to-all communication within a network, not one-to-closest. The 'closest' concept applies to anycast, not broadcast.
★ When this WOULD be the correct answer
In a question asking to match 'Broadcast' to its role in IPv4 addressing, where the correct role is 'one-to-all communication within a broadcast domain'.
Why candidates choose this
Candidates may confuse broadcast with anycast, thinking broadcast delivers to the nearest node, or they misinterpret 'closest' as all nodes in the local segment.
Why this is wrong here
Multicast is one-to-group communication, not one-to-all. One-to-all is broadcast, which sends data to every host on the network segment.
★ When this WOULD be the correct answer
In a question asking 'Which communication method sends data from one source to all hosts on the network?', multicast would be wrong, but if the question were 'Which method sends data to a specific subset of hosts that have joined a group?', multicast would be correct.
Why candidates choose this
Candidates confuse multicast with broadcast because both involve multiple recipients, but multicast targets a specific group, not all hosts.
Why this is wrong here
Anycast is one-to-nearest communication (multiple hosts share the same IP, traffic goes to the closest), not one-to-group. The question asks for 'one-to-group', which describes multicast.
★ When this WOULD be the correct answer
A question that asks: 'Which communication type sends packets to the nearest member of a group, often used for DNS or CDN services?' Then anycast (one-to-nearest) would be correct.
Why candidates choose this
Candidates confuse 'any' with 'group' because the term 'any' suggests multiple possible destinations, leading them to incorrectly associate it with group communication instead of nearest-member delivery.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Visual reference
Go deeper
Learn chapter
Collision Domains and Broadcast Domains
Key term
DNS
DNS is the system that translates human-friendly domain names like example.com into machine-readable IP addresses so computers can find each other on a network.
Key term
Internet Group Management Protocol
IGMP is a communication protocol used by devices on a network to report their membership in multicast groups to nearby routers, enabling efficient group data delivery.
About these practice questions
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-301 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-301 exam.