Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
What problem do first-hop redundancy protocols such as HSRP solve?
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
They prevent duplicate MAC addresses on a LAN
Duplicate MAC prevention is not the purpose of HSRP.
B
Best answer
They provide a backup default gateway for end hosts
Correct. FHRPs provide gateway redundancy for hosts.
C
Distractor review
They replace spanning tree on switched networks
They do not replace STP.
D
Distractor review
They encrypt traffic between users and the default gateway
They do not inherently encrypt host traffic.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is mistaking HSRP for a protocol that prevents duplicate MAC addresses or replaces Spanning Tree Protocol (STP). While STP prevents Layer 2 loops by blocking redundant paths, HSRP operates at Layer 3 to provide gateway redundancy. Another trap is assuming HSRP encrypts traffic between hosts and routers, which it does not. Candidates might also confuse HSRP with routing protocols like OSPF or EIGRP, but HSRP only manages default gateway availability, not routing decisions. Understanding these distinctions is crucial to avoid selecting incorrect options that describe unrelated network functions.
Technical deep dive
How to think about this question
First-hop redundancy protocols (FHRPs) such as HSRP (Hot Standby Router Protocol) provide network resilience by allowing multiple routers to share a virtual IP address that acts as the default gateway for hosts on a LAN. This virtual gateway IP address remains reachable even if the primary router fails, ensuring uninterrupted host connectivity to external networks. HSRP achieves this by electing an active router to forward traffic and a standby router to take over if the active router becomes unavailable. In Cisco networks, HSRP operates by assigning a virtual IP and MAC address to a group of routers. Hosts configure their default gateway as this virtual IP, not the physical IP of any single router. The routers communicate using hello messages to monitor each other's status. If the active router fails or becomes unreachable, the standby router immediately assumes the active role, taking over the virtual IP and MAC addresses. This failover process is transparent to hosts, preventing traffic disruption and eliminating the need for manual reconfiguration. A common exam trap is confusing HSRP with protocols that serve different purposes, such as STP for loop prevention or encryption protocols for security. HSRP does not prevent duplicate MAC addresses or encrypt traffic; its sole function is gateway redundancy. Practically, understanding HSRP’s role helps network engineers design fault-tolerant LANs where hosts always have a reachable default gateway, which is critical for maintaining IP connectivity in enterprise environments.
KKey Concepts to Remember
- First-hop redundancy protocols provide hosts with a virtual default gateway IP address that remains available despite physical router failures.
- HSRP elects an active router to forward traffic and a standby router to take over if the active router fails, ensuring continuous gateway availability.
- Hosts configure their default gateway as the virtual IP address managed by HSRP, not the physical IP of any single router.
- Routers in an HSRP group exchange hello messages to monitor the active router's status and trigger failover when necessary.
- HSRP operates at Layer 3 to provide gateway redundancy and does not prevent duplicate MAC addresses or replace Spanning Tree Protocol.
- HSRP does not encrypt traffic between hosts and routers; its function is solely to maintain default gateway availability.
- Failover in HSRP is transparent to hosts, preventing network disruption and eliminating the need for manual reconfiguration.
- Understanding HSRP’s role helps design fault-tolerant LANs where IP connectivity depends on reliable default gateway access.
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?
First-hop redundancy protocols provide hosts with a virtual default gateway IP address that remains available despite physical router failures.
What is the correct answer to this question?
The correct answer is: They provide a backup default gateway for end hosts — First-hop redundancy protocols allow hosts to use a virtual default gateway that can remain available even if one physical router fails.
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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