Exam 350-401 topic 1 question 590 discussion

Option A is incorrect. The authentication type is cleartext; 'text' keyword is being used. We can use md5 authentication by using 'authentication md5' command. Option B is incorrect, and irrelevant to the context of our question. We need to use 'show ip route' command to display R2's routing table and confirm. Option C is correct. We will track the reachability to IP address '10.10.1.1' in its routing table and if it's not reachable by R1, R1's priority will decrement by 20. This will set R1's priority to '90' making it less than R2's default priority (100,) and R2 becomes the active router. Option D is incorrect If R1 reboots, R2 becomes the primary virtual router until R1 comes back. (Tested in PT)

C is correct. tricky question b is completely wrong, there is nothing in the question that can be used to identify if b is correct or wrong. D is correct until you remember that preemption is default in VRRP :D C seems to be wrong at first, then you look at the track again to see that it's tracking the IP route entry in the routing table not pinging the ip

answer makes sense. A- Wrong, its cleartext B- Wrong, not enough information to infer this C- Correct, if there is reachability to the network 10.10.1.1/32, R1's priority is default 100, which is equal to R2's priority of default 100, so what is the next tie breaker? the higher IP address, R1 wins, and with VRRP having preempt enabled by default, R1 becomes the Master. D- Wrong

C is the correct answer

R1 tracks a /32 network and remove vrrp priority if the /32 goes away.

It is NOT D, Why ? Because preemption is enabled by default. Which means that if R1 reboots -> R2 will become primary and when R1 reboot is finished will take the role again because of the default preemption ! -> C seems right.

cisco_R3(config-subif)#do s runn interface Ethernet0/0.40 ! interface Ethernet0/0.40 encapsulation dot1Q 40 ip address 172.16.13.2 255.255.255.0 vrrp 10 ip 172.16.13.254 vrrp 10 track 4 decrement 20 end cisco_R3(config-subif)#do s track 4 Track 4 IP route 5.5.5.55 255.255.255.255 reachability Reachability is Down (no ip route) 1 change, last change 00:04:13 First-hop interface is unknown Tracked by: VRRP Ethernet0/0.40 10 cisco_R3(config-subif)#do s vrrp Ethernet0/0.40 - Group 10 State is Master Virtual IP address is 172.16.13.254 Virtual MAC address is 0000.5e00.010a Advertisement interval is 1.000 sec Preemption enabled <<<<<<<<<< by default, so it'll become MASTER after high priority Priority is 80 Track object 4 state Down decrement 20 Master Router is 172.16.13.2 (local), priority is 80 Master Advertisement interval is 1.000 sec Master Down interval is 3.609 sec cisco_R3(config-subif)#

tricky question, I hate it ... D. is true anyway, C. is unclear, let's say what happens if this route flaps? after that R2 will be master anyway cos no feature PREEMPTION is configured on R1... right?

i think that is close answer

I believe D is correct because preemption is enabled in VRRP by default. The answer C says " if 10.10.1.1/32 is in its routing table." if this route is statically configured it will still be there disregarding its reachability.

C is correct because of the tracking feature. Exhibit speaks nothing about availability of routes, so we can not tell which routes are available or not available.

Provides answer is correct. R1 is primary if 10.10.1.1/32 is in its routing table. -> because of track 20 command

A believe it is C. By ''sh run int fa0/0'' command we are not able to tell if route is in routing table or not. On router 1 is configured IP SLA which is tracking reachability to 10.10.1.1 - so if this route is unavailable, routers 1 priority decrements and it becomes Secondary, but if the route is reachable it will stay Primary because of its 110 priority.

Answer: B

I believe B is true.