Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
What is the purpose of the default gateway on a host?
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
Distractor review
It assigns IP addresses dynamically to the host
That is the role of DHCP.
B
Distractor review
It resolves hostnames into IP addresses
That is the role of DNS.
C
Best answer
It forwards traffic to remote networks
Off-subnet traffic is sent to the default gateway.
D
Distractor review
It encrypts traffic between hosts
A gateway forwards packets; encryption is a separate function.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking the default gateway’s role for that of DHCP or DNS servers. Some candidates incorrectly believe the default gateway assigns IP addresses or resolves hostnames, which are actually DHCP and DNS functions respectively. This confusion arises because all these services are essential for network communication but serve distinct purposes. The default gateway specifically forwards traffic destined for remote networks, not managing IP address allocation or name resolution. Misunderstanding this can lead to incorrect answers and misconfiguration in real networks.
Technical deep dive
How to think about this question
The default gateway is a critical networking concept that defines the router interface a host uses to send packets destined for remote networks outside the local subnet. When a host wants to communicate with an IP address not in its own subnet, it forwards the traffic to the default gateway, which then routes the packet toward the destination network. This mechanism enables inter-network communication by bridging local hosts to external networks, including the internet. In Cisco networking and the CCNA context, the default gateway is configured on the host as the IP address of the local router interface connected to the same subnet. The host uses its subnet mask to determine whether a destination IP is local or remote. If remote, the host sends the packet to the default gateway, which performs routing decisions based on its routing table. This process is fundamental to IP routing and subnetting principles, ensuring proper packet forwarding beyond the local broadcast domain. A common exam trap is confusing the default gateway with other network services such as DHCP or DNS. While DHCP assigns IP addresses and DNS resolves hostnames, the default gateway strictly forwards traffic to remote networks. Practically, if the default gateway is misconfigured or missing, hosts cannot communicate outside their subnet, causing connectivity failures. Understanding this distinction is essential for troubleshooting and configuring Cisco devices correctly.
KKey Concepts to Remember
- The default gateway is the IP address of the local router interface that a host uses to send traffic destined for remote networks outside its subnet.
- A host uses its subnet mask to determine if a destination IP address is local or remote and forwards remote traffic to the default gateway.
- The default gateway performs routing functions by forwarding packets from the local subnet to other networks based on its routing table.
- DHCP assigns IP addresses dynamically to hosts and is not related to the forwarding function of the default gateway.
- DNS resolves hostnames into IP addresses and does not handle packet forwarding or routing decisions.
- If the default gateway is misconfigured or missing, hosts cannot communicate with devices outside their local subnet, causing connectivity issues.
- The default gateway is essential for inter-network communication and is a fundamental concept in IP routing and subnetting.
- Understanding the distinct roles of default gateway, DHCP, and DNS prevents common exam mistakes and supports accurate network troubleshooting.
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
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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 default gateway is the IP address of the local router interface that a host uses to send traffic destined for remote networks outside its subnet.
What is the correct answer to this question?
The correct answer is: It forwards traffic to remote networks — The default gateway is the local router interface a host uses when sending traffic to destinations outside its own subnet.
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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