Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
Which statement best describes the purpose of a 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
Best answer
It is the next hop used for traffic going to remote networks.
This is correct because the default gateway forwards off-subnet traffic.
B
Distractor review
It is the hostname of the DNS server.
This is wrong because DNS and default gateways serve different functions.
C
Distractor review
It is the broadcast address for the subnet.
This is wrong because the broadcast address is not the router next hop.
D
Distractor review
It is the same thing as the subnet mask.
This is wrong because a subnet mask and default gateway are different configuration elements.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking the default gateway for the DNS server or the subnet mask. Candidates may incorrectly select the DNS server hostname because both are IP-related settings on a host, but DNS resolves names rather than forwarding traffic. Others confuse the default gateway with the broadcast address, which is used for sending packets to all hosts on a subnet, not for routing to remote networks. Misunderstanding these roles leads to incorrect answers. Remember, the default gateway is specifically the next-hop router IP used when the destination is outside the local subnet.
Technical deep dive
How to think about this question
A default gateway is a network device, typically a router, that serves as the forwarding host to other networks when a destination IP address is outside the local subnet. Hosts use the default gateway IP address to send packets destined for remote networks, enabling communication beyond the local broadcast domain. This concept is fundamental in IP routing and subnetting, where the host must decide whether a destination is local or remote based on its subnet mask. When a host sends traffic, it first compares the destination IP address with its own IP address and subnet mask to determine if the destination is on the same subnet. If the destination is off-subnet, the host forwards the packet to the default gateway, which then routes the packet toward the remote network. This decision process ensures efficient traffic flow and proper routing in multi-network environments, a key topic in CCNA routing fundamentals. A common exam trap is confusing the default gateway with other network elements such as DNS servers, broadcast addresses, or subnet masks. The default gateway specifically handles off-subnet traffic forwarding, whereas DNS resolves domain names, broadcast addresses target all hosts on a subnet, and subnet masks define network boundaries. Understanding these distinctions is critical for correctly answering questions about host configuration and routing behavior in Cisco networks.
KKey Concepts to Remember
- A host uses the default gateway IP address to forward packets destined for remote networks outside its local subnet.
- The subnet mask on a host determines whether a destination IP address is local or requires forwarding to the default gateway.
- The default gateway is typically a router interface configured to route traffic between different IP subnets.
- DNS servers resolve domain names to IP addresses and do not handle packet forwarding or routing functions.
- Broadcast addresses target all hosts on a subnet and are not used as next-hop addresses for routing traffic.
- Hosts send off-subnet traffic to the default gateway instead of attempting direct delivery on the local link.
- Misidentifying the default gateway as a DNS server or subnet mask is a common exam mistake.
- Routing decisions on a host depend on comparing the destination IP with the subnet mask to determine if the default gateway is needed.
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.
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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?
A host uses the default gateway IP address to forward packets destined for remote networks outside its local subnet.
What is the correct answer to this question?
The correct answer is: It is the next hop used for traffic going to remote networks. — A default gateway provides the next hop for traffic destined to remote networks. In practical terms, when the host determines that a destination is not on its own local subnet, it sends the traffic toward the router instead of trying to deliver it directly on the local link. This is a foundational host-networking concept and a useful easy-level question for progression.
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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