a router, being a device that communicates with other networks, the client-being the source generating the request, and the server being the dhcp server on the destination lan. the router with the helper-address configured(which is on the local network) will turn the broadcast traffic into unicast traffic, after which any device it hits will see it as unicast, not needing any further configuration.
thus, we're looking at B
https://networkengineering.stackexchange.com/questions/41376/how-ip-helper-address-works
https://community.cisco.com/t5/routing/forwarding-udp-broadcast-traffic/td-p/595108
https://community.cisco.com/t5/switching/broadcast-traffic-on-router/td-p/751300
EXAM 200-301 TOPIC 1 QUESTION 530 DISCUSSION (see exhibit)
The ip helper is on R2 (closest to the DHCP server). The client is on R1.
In DHCPv4 (IPv4 addressing), you configured the IP Helper feature on Cisco routers when the DHCP server was NOT ON THE SAME SEGMENT AS THE REQUESTING CLIENTS. -All in One CCT/CCNA Routing and Switching.
Because client send DHCP request packet to the helper by broadcast, so client and helper must be in the same subnet, they are very close. By contrast, helper router forward the request to the DHCP server by nuicast, which is routable. So the DHCP server can be far away to the helper.
I can explain,
By default routers don’t forward broadcast traffic so the ip helper config will need to be applied on every interface towards the client. This means if you have 2 routers between a DHCP server and a client, the helper config will need to be on BOTH routers. C is actually the correct answer, B works for 1 scenario, C works for all scenarios
B is the correct answer in all scenarios.
You only need to configure ip helper address on the closet router to the client.
Then you would need to make sure that an ip route exists between the dhcp server and that router that is acting as a dhcp helper
There is no need to configure two routers along the way as dhcp helpers because the one closest to the client chnages the broadcast to a unicast request automatically
upvoted 3 times
...
...
...
...
This section is not available anymore. Please use the main Exam Page.200-301 Exam Questions
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
shakyak
Highly Voted 3 years, 7 months agogaber
Highly Voted 3 years, 5 months agomici
Most Recent 7 months, 1 week ago[Removed]
1 year, 3 months agoa67c04a
1 year, 4 months agoNSA_Poker
1 year, 6 months agoNSA_Poker
1 year, 4 months agoYinxs
1 year, 10 months agojustajoke
1 year, 11 months ago[Removed]
2 years, 8 months agobwg
4 years agoSten111
3 years, 12 months agodave1992
3 years, 8 months ago[Removed]
2 years, 8 months agoFALARASTA
2 years, 1 month ago