Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
Which two statements accurately describe the relationship between a network address and a broadcast address in IPv4 subnetting?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
The network address is the first address in the subnet block.
This is correct because the network address marks the beginning of the subnet.
B
Best answer
The broadcast address is the last address in the subnet block.
This is correct because the broadcast address marks the end of the subnet.
C
Distractor review
Both addresses are normal host addresses that can be assigned to users.
This is wrong because both are reserved.
D
Distractor review
The broadcast address always becomes the default gateway.
This is wrong because the default gateway is a router interface, not the broadcast address.
E
Distractor review
These concepts exist only in IPv6 and not IPv4.
This is wrong because the question is specifically about IPv4 subnetting.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is assuming that the network and broadcast addresses are usable host addresses. Candidates may mistakenly select options implying these addresses can be assigned to devices, which is incorrect. The network address marks the subnet’s start and the broadcast address marks its end, both reserved for special functions. Confusing these reserved addresses with assignable host addresses leads to subnetting errors and incorrect IP planning. This trap often arises because candidates focus on the numerical order of addresses without understanding their reserved roles in IPv4 subnetting.
Technical deep dive
How to think about this question
In IPv4 subnetting, the network address represents the very first IP address in a subnet block. It is used to identify the subnet itself and is not assignable to any host device. This address is derived by performing a bitwise AND operation between the IP address and the subnet mask, which zeroes out the host bits, leaving only the network portion. The network address serves as a fundamental reference point for routing and subnet identification within Cisco networks. The broadcast address is the last IP address in the subnet block and is reserved for sending packets to all hosts within that subnet simultaneously. It is calculated by setting all the host bits to 1 within the subnet. This address cannot be assigned to any individual host or device. Cisco devices use the broadcast address to efficiently communicate with all devices on a subnet, such as for ARP requests or DHCP broadcasts. A common exam trap is confusing the network and broadcast addresses with usable host addresses. Both are reserved and cannot be assigned to hosts, which reduces the total number of usable IP addresses in a subnet by two. Understanding this distinction is critical for subnetting questions on the CCNA exam. Practically, network engineers must correctly identify these addresses to avoid IP conflicts and ensure proper network segmentation and routing.
KKey Concepts to Remember
- The network address identifies the starting IP address of a subnet and is derived by zeroing all host bits in the IP address.
- The broadcast address identifies the ending IP address of a subnet and is calculated by setting all host bits to one.
- Both the network and broadcast addresses are reserved and cannot be assigned to individual hosts within the subnet.
- The usable host IP range lies strictly between the network address and the broadcast address in any IPv4 subnet.
- Cisco routers and switches use the network address to route packets to the correct subnet and the broadcast address to send packets to all hosts.
- Subnetting calculations require understanding the reserved nature of network and broadcast addresses to avoid IP address conflicts.
- Misidentifying the network or broadcast address as a host address leads to common subnetting errors on the CCNA exam.
- The subnet mask determines the boundary between network and host portions, enabling calculation of network and broadcast addresses.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Related practice questions
Related 200-301 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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CCNA IPv6 practice questions
Practise IPv6 addressing, routes, neighbour discovery and common IPv6 exam traps.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
The network address identifies the starting IP address of a subnet and is derived by zeroing all host bits in the IP address.
What is the correct answer to this question?
The correct answer is: The network address is the first address in the subnet block. — The network address identifies the beginning of the subnet block, and the broadcast address identifies the final address in that block. In practical terms, both are reserved and are not assigned to ordinary hosts. The usable host range falls between them. This is a very basic subnetting truth, but it is foundational for every other addressing calculation.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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