FirstTry
Objective 3.5200-301

3.5 Describe the purpose, functions, and concepts of first hop redundancy protocols.

Objective 3.5 sits in IP Connectivity, which carries 25% of the CCNA exam. The questions below are original, written from the official objective title above, and each explanation cites the Cisco page it rests on.

Objective title verbatim from the official objectives. Cisco exam page ↗

A worked example

Shown solved, with the whole explanation open: this is what every question here carries.

3-5IP ConnectivityModerate

Hosts on a VLAN point at an HSRP virtual IP address as their default gateway. The active router then loses power. What do the hosts have to change?

Each host is repointed at the standby router's own addressRepointing hosts is exactly the manual work the virtual address exists to avoid, and it would break again at the next failure.
Each host relearns a gateway from the next advertisementThis describes a discovery protocol such as IRDP, whose timers are far too slow to cover a first hop failure.
Nothing, until the failed router is brought back upService resumes at the switchover rather than at the repair, and the failed router may return as the standby.
Nothing, as the standby takes over the group addressesCorrect · your answerCorrect. The standby assumes the group's IP and MAC addresses.

Correct.

Concept

A host keeps one gateway address and has no way to react when the device behind it dies. First hop redundancy answers that by making the gateway address belong to a group rather than to a box, so the address survives the loss of any member.

Why D

The group owns both a virtual IP address and a virtual MAC address, and the standby assumes control of that pair when it detects the failure. Frames the hosts were already sending to that MAC address keep being answered, so the change is invisible above Layer 3.

Source

#fhrp#hsrp

Now you: objective 3.5 questions

No account needed. The explanation opens when you answer.

Sample question 1 of 3

3-5IP ConnectivityHard

R1 is the active router for group 1 when its tracked uplink Gi1/0/24 goes down.

R1
 standby 1 ip 10.1.1.254
 standby 1 priority 110
 standby 1 preempt
 standby 1 track GigabitEthernet1/0/24

R2
 standby 1 ip 10.1.1.254
 standby 1 priority 100
 standby 1 preempt

Which router is active afterwards?

Sample question 2 of 3

3-5IP ConnectivityHard

A VRRP group uses identifier 7 for an IPv4 virtual address. Which hardware address do hosts on the segment resolve that virtual address to?

Sample question 3 of 3

3-5IP ConnectivityHard

After a failover the switches in the path send traffic for the virtual address to the new master within a moment, without any host doing anything. What updates the switches?

That’s 3 of the full CCNA bank.

Keep going free: 10 questions per certification in bank practice, with no account.

Continue practicing

Read the sources

These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.

More objectives in IP Connectivity