6.4

Question 1

What is the purpose of a DHCP relay agent?

Answer 1

Each broadcast domain needs its own DHCP server. The DHCP relay does that for multiple broadcast domains

Question 2

What is the purpose of an IP helper?

Answer 2

Helps routers listen for DHCP broadcasts and routes them to the DHCP server

Question 3

How does an IP helper differ from a DHCP relay agent?

Answer 3

Helps others routers act as DHCP agent.

Question 4

What does being RFC 1542 compliant mean?

Answer 4

Routers that forward DHCP traffic between subnets

Question 5

What does “ip helper-address 10.1.0.200” do?

Answer 5

Makes the port that receives DHCP broadcast, forward the packet to the DHCP subnet.

Question 6

What happens when DHCP service goes offline? (Think it through)

Answer 6

As leases expire, users can’t contact remote hosts.

Question 7

What should you do with DHCP scope exhaustion?

Answer 7

Create new larger scope.
.
Reduce lease period (bandaid, but helps with high client turnover)

Question 8

What do you need to mind when you reconfigure DHCP server and scopes? How do you mitigate this?

Answer 8

Clients IP info will be wrong due to update.
.
Lower lease duration, force clients to renew, or run parallel settings temporarily