Q) What is DHCP?
A: DHCP is a protocol used to assign network configuration parameters automatically to the clients.
Q) How DHCP works?
A) DHCP works based upon DORA process
Step 1: Client sends Discover message to find DHCP server
Source IP: 0.0.0.0
Destination IP: 255.255.255.255
Source MAC: MAC address of the client
Destination MAC: FFFF:FFFF:FFFF
Step2: DHCP server responds with OFFER message contains network configuration parameters
Source IP: IP address of DHCP server
Destination IP: 255.255.255.255
Source MAC: MAC address of the DHCP server
Destination MAC: FFFF:FFFF:FFFF
Step3:Client responds with Request message to DHCP Offer message
Source IP: 0.0.0.0
Destination IP: 255.255.255.255
Source MAC: MAC address of the Client
Destination MAC: FFFF:FFFF:FFFF
Step4: DHCP server sends Acknowledgement message to confirm network configuration parameters.
Source IP: DHCP server IP address
Destination IP: 255.255.255.255
Source MAC: MAC address of the DHCP sever
Destination MAC: FFFF:FFFF:FFFF
Q) What is DHCP Scope?
A: DHCP scope is range of IP addresses are assigned to clients from DHCP Server.
Q) What is DHCP Relay Agent?
A: DHCP Relay Agent is a networking device which forwards DHCP messages between DHCP client and DHCP Server available on different IP networks.
Q) What is DHCP Reservation?
A) DHCP Reservation is a method of assigning permanent IP address to the client by using DHCP server.
Q) What is the difference between DHCP and BOOTP?
A: BOOTP is a protocol which assigns IP address to the device when it is booting, whereas DHCP server assigns IP address to the device after it boots.
Q) What is DHCP Lease Time?
A:- DHCP Lease time is the time duration assigned to the clients by DHCP server to use particular network configuration parameters.
Q) DHCP uses which Protocol and Port Number?
A: - 1) DHCP uses UDP as Protocol
2) DHCP uses port number 67 for DHCP server and port number 68 for DHCP client
Q) What are the benefits of DHCP?
A: 1) Reduces IP address conflicts.
2) Centralized network management
3) IP address Management
Q) What is the use of DHCP Option 43?
A: DHCP option 43 is used to indicate wireless controller IP address to Access Points.
A: DHCP is a protocol used to assign network configuration parameters automatically to the clients.
Q) How DHCP works?
A) DHCP works based upon DORA process
Step 1: Client sends Discover message to find DHCP server
Source IP: 0.0.0.0
Destination IP: 255.255.255.255
Source MAC: MAC address of the client
Destination MAC: FFFF:FFFF:FFFF
Step2: DHCP server responds with OFFER message contains network configuration parameters
Source IP: IP address of DHCP server
Destination IP: 255.255.255.255
Source MAC: MAC address of the DHCP server
Destination MAC: FFFF:FFFF:FFFF
Step3:Client responds with Request message to DHCP Offer message
Source IP: 0.0.0.0
Destination IP: 255.255.255.255
Source MAC: MAC address of the Client
Destination MAC: FFFF:FFFF:FFFF
Step4: DHCP server sends Acknowledgement message to confirm network configuration parameters.
Source IP: DHCP server IP address
Destination IP: 255.255.255.255
Source MAC: MAC address of the DHCP sever
Destination MAC: FFFF:FFFF:FFFF
Q) What is DHCP Scope?
A: DHCP scope is range of IP addresses are assigned to clients from DHCP Server.
Q) What is DHCP Relay Agent?
A: DHCP Relay Agent is a networking device which forwards DHCP messages between DHCP client and DHCP Server available on different IP networks.
Q) What is DHCP Reservation?
A) DHCP Reservation is a method of assigning permanent IP address to the client by using DHCP server.
Q) What is the difference between DHCP and BOOTP?
A: BOOTP is a protocol which assigns IP address to the device when it is booting, whereas DHCP server assigns IP address to the device after it boots.
Q) What is DHCP Lease Time?
A:- DHCP Lease time is the time duration assigned to the clients by DHCP server to use particular network configuration parameters.
Q) DHCP uses which Protocol and Port Number?
A: - 1) DHCP uses UDP as Protocol
2) DHCP uses port number 67 for DHCP server and port number 68 for DHCP client
Q) What are the benefits of DHCP?
A: 1) Reduces IP address conflicts.
2) Centralized network management
3) IP address Management
Q) What is the use of DHCP Option 43?
A: DHCP option 43 is used to indicate wireless controller IP address to Access Points.
Sir, I feel some conflict there and I verify through wireshark,
ReplyDeletein dhcp step 2 ---
Source IP: IP address of DHCP server
Destination IP: 255.255.255.255 (dhcp client ip address provided by dhcp server)
and step 4 also some typing issue..
Thank you for sharing these Interview Questions
ReplyDelete