2.6 DHCP Configuration

Question 1

What are 6 scope property options for DHCP configuration?

Answer 1

1. IP address range
2. Subnet mask
3. Lease durations
4. DNS server
5. Default gateway
6. VOIP servers

Question 2

What are DHCP pools?

Answer 2

a group of IP addresses where each subnet has its own scope

– 192.168.1.0/24
– 192.168.2.0/24
– 192.168.3.0/24

Question 3

What is a scope?

Answer 3

generally a single contiguous (grouped in sequence) pool of IP addresses

Question 4

A DHCP server keeps a list of past ____

Answer 4

assignments

Question 5

DHCP servers engage in 2 types of IP address assignments:

Answer 5

1. Dynamic (leases out addresses from a big pool)
2. Automatic (you always get the same IP address that’s on the DHCP server list of past assignments to you)

Question 6

What is DHCP address allocation?

Answer 6

Address reservation (admin configured)

Question 7

How does DHCP address allocation work?

Answer 7

It has a table of MAC addresses, each with a matching IP address

Question 8

What are other names for DHCP address allocation? (3)

St
IP
St

Answer 8

Static DHCP, IP Reservation, Static Assignment

Question 9

How is DHCP lease time configured?

Answer 9

by the admin

Question 10

What should you do after IP address reallocation?

Answer 10

Reboot your computer to confirm the lease

Question 11

How can a workstation manually release the IP address?

Answer 11

Moving to another subnet

Question 12

What are the 2 timers for DHCP renewal?

Answer 12

T1 Timer
T2 Timer

Question 13

Explain the T1 timer for renewal

Answer 13

Checks in with the lending DHCP server to renew the IP address

(default, 50% of the lease time)

Question 14

Explain the T2 timer for renewal

Answer 14

If the original DHCP server is down, try rebinding with any DHCP server (87.5% of the lease time 7/8ths)

Question 15

How long is a DHCP lease time (in Messer’s example)?

Answer 15

8 days

(Renewal timer for T1 would be 4 days, T2 would be 7 days)