DHCP Interview Questions and Answers
Q1: What is DHCP server?
Ans: DHCP stand for Dynamic Host Configuration Protocol. It is network protocol that enable a server to assign automatically IP address range such as subnet, gateway etc. to computer in network. It uses 67 and 68 port number.
Q2: How does it work?
Ans: It works on DORA process.
D denote DHCP Discover
O denote DHCP Offer
R denote DHCP Request
A denote DHCP Acknowledgement
Q3: Which port are used by DHCP?
Ans: 67 and 68
Q4: What is DHCP scope?
Ans: It’s range of possible IP Addresses that DHCP server can lease IP address to client on a subnet.
Q5: What is DHCP Super Scope?
Ans: A super scope is a collection of individual scopes that can be managed as a single administrative unit in network.
Q6: What is reservation in DHCP?
Ans: DHCP reservation feature is used to reserve IP address for providing permanent IP address to client.
Q7: What does default time lease new IP address to client?
Ans: 8 days
Q8: What is command used to release IP address?
Ans: ipconfig /release
Q9: What is command used to renew IP address?
Ans: ipconfig /renew
Q10: What is DHCP relay agent?
Ans: A DHCP relay agent is any host or IP router that forwards DHCP packets between clients and servers.
Q11: How to make client of DHCP server?
Ans: Check mark on Obtain an IP address automatically
Q12: What is APIPA IP address?
Ans: When DHCP server fail or down to assign automatically ip address to client in that case computer automatic assign ip address itself that is APIPA IP address.
Q13: What is the range of APIPA IP address?
Ans: 169.254.0.1 to 169.254.255.255
Q14: Suppose we have a PC which is connected to our corporate network and unable to get ip address and when I am using ipconfig command to check ip address so show 169.254.x.x ip address what is the reason behind it?
Ans: It possible that DHCP down or unable to make connection between server to client.
