Match each IPv4-related concept to its most accurate role.
Drag a concept onto its matching description — or click a concept then click the description.
Defines which destinations are local versus remote
Next hop used for off-subnet traffic
Address used to reach all hosts in the local subnet
Address identifying one device in the subnet
⚠ Common exam trap
Do not confuse the function of the IP address with other network layer concepts like subnet mask or default gateway. The IP address is the unique identifier for a host.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
IPv4 address
The IPv4 address uniquely identifies a host on an IP network. The subnet mask distinguishes the network and host portions of the address, determining the local subnet. The default gateway is the router interface that forwards traffic to destinations outside the local subnet. The DNS server resolves domain names to IP addresses, enabling name-based communication. Each concept plays a distinct and essential role in IPv4 networking.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
IPv4 address
Why this is correct
Correct. The IPv4 address is the unique logical identifier for a device on an IP network, allowing other hosts to locate and communicate with it.
Subnet mask
Why this is correct
Correct. The subnet mask defines which part of the IPv4 address belongs to the network and which part belongs to the host, used to determine the local subnet boundary.
Default gateway
Why this is correct
Correct. The default gateway is the IP address of a router interface that forwards packets from the local subnet to remote networks.
DNS server
Why this is correct
Correct. The DNS server translates human-readable domain names into IPv4 addresses, a critical function for internet communication.
Visual reference
Quick reference
| Class | First Octet Range | Default Mask | Networks | Hosts per Network |
|---|---|---|---|---|
| A | 1–126 | /8 (255.0.0.0) | 126 | 16,777,214 |
| B | 128–191 | /16 (255.255.0.0) | 16,384 | 65,534 |
| C | 192–223 | /24 (255.255.255.0) | 2,097,152 | 254 |
| D | 224–239 | N/A | Multicast groups | — |
| E | 240–255 | N/A | Reserved / experimental | — |
127.x.x.x is reserved for loopback. Modern networks use CIDR (classless) rather than classful addressing.
Go deeper
Learn chapter
IPv4 Addressing and Address Classes
Key term
Subnet
A subnet is a logical subdivision of an IP network, created by partitioning a larger network address space using subnet masks.
Key term
Software-defined Wide Area Network
A Software-defined Wide Area Network (SD-WAN) is a virtual network architecture that uses software to manage and optimize the connections between branch offices and data centers across a wide geographic area.
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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.