Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
Which two statements accurately describe a default gateway from a host perspective?
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 path a host uses for destinations outside the local subnet.
This is correct because the default gateway is used for off-subnet traffic.
B
Best answer
It is typically the IP address of a local router or Layer 3 interface on the same subnet.
This is correct because the host must be able to reach the gateway locally.
C
Distractor review
It replaces the need for a subnet mask.
This is wrong because the host still needs the subnet mask to determine what is local.
D
Distractor review
It is the same thing as a DNS server.
This is wrong because default gateway and DNS server are different roles.
E
Distractor review
It is used only for ARP broadcasts.
This is wrong because the gateway is for forwarding off-subnet traffic, not just ARP behavior.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking the default gateway for a DNS server or assuming it replaces the subnet mask. Candidates may incorrectly believe the gateway handles name resolution or that it defines the subnet boundaries. Another common error is thinking the gateway is only used for ARP broadcasts, which is incorrect because ARP is a layer 2 protocol for MAC address resolution within the local subnet. The default gateway specifically handles forwarding traffic destined outside the local subnet, so confusing these roles leads to incorrect answers.
Technical deep dive
How to think about this question
A default gateway in a host’s network configuration is the IP address of a router interface on the same subnet as the host. It serves as the next-hop device that forwards packets destined for IP addresses outside the local subnet. When a host determines that a destination IP address is not within its own subnet based on its subnet mask, it sends the traffic to the default gateway for routing to other networks. The decision process for using the default gateway involves the host comparing the destination IP address with its own IP address and subnet mask. If the destination is outside the subnet range, the host forwards the packet to the default gateway’s IP address. This gateway must be reachable on the local subnet, which is why it typically has an IP address within the same subnet as the host. The gateway then routes the packet toward its final destination using routing protocols or static routes configured on the router. A common exam trap is confusing the default gateway with other network services such as DNS servers or assuming it replaces the subnet mask. The default gateway does not replace subnetting; it complements it by handling off-subnet traffic. Also, the gateway is not involved in ARP broadcasts beyond resolving its own MAC address for local delivery. Understanding this distinction helps avoid misconfigurations and troubleshooting errors in Cisco network environments.
KKey Concepts to Remember
- A default gateway is the IP address of a router interface on the same subnet as the host that forwards traffic destined for remote networks.
- Hosts use the subnet mask to determine if a destination IP address is local or requires forwarding to the default gateway.
- The default gateway must be reachable on the local subnet so the host can send packets directly to it using layer 2 addressing.
- Traffic destined outside the local subnet is sent to the default gateway, which routes it toward the destination network using routing protocols or static routes.
- The default gateway does not replace the subnet mask; both are required for proper IP addressing and routing decisions.
- The default gateway is distinct from DNS servers, which resolve domain names to IP addresses and do not forward packets.
- ARP broadcasts resolve MAC addresses within the local subnet but do not involve the default gateway beyond its own MAC address resolution.
- Misunderstanding the default gateway’s role often leads to connectivity issues and incorrect exam answers about network fundamentals.
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 default gateway is the IP address of a router interface on the same subnet as the host that forwards traffic destined for remote networks.
What is the correct answer to this question?
The correct answer is: It is the next-hop path a host uses for destinations outside the local subnet. — A default gateway is the local router or Layer 3 interface that a host uses for traffic destined beyond its own subnet. In plain language, the host uses the gateway when the destination is not local. The default gateway does not replace the host’s own IP address or subnet mask; it complements them by providing the next-hop path for remote communication. This is a foundational host-networking concept because many connectivity issues come from misunderstanding what the gateway actually does. The two correct answers are the ones that describe remote-traffic forwarding and the local next-hop role of the gateway.
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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