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1. dhclient -r
This releases the current IP address lease
2. dhclient
This requests a new IP address.
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What is the Linux command to consult a DHCP server?
dhcp-client
What does acquiring network address means?
The device is looking for a DHCP server to obtain a DHCP address.
A request by a DHCP client for permission to use the network configuration previously offered by the DHCP server refers to?
A client will request an IP address it had previously in a DHCP Discover or Request message with option 50 marked, and an IP address inserted into the data field of option 50.
When configuring a Linux DHCP server what is the option used to ensure a certain machine is always given the same address?
hardware physical address
What service distributes IP addresses automatically?
DHCP (Dynamic Host Configuration Protocol). A network node can request an IP address from a DHCP server using a broadcast frame. The DHCP server may assign an IP address to the node as well as a subnet mask and default gateway.
Can a computer communicate without an IP address?
Yes. There are a number of ways this can (and in fact does) happen. The most obvious happens in a DHCP request, which is a method by which a computer that does not have an IP address gets an IP address from a DHCP server.
Which OS can act as a DHCP server?
Windows Server Family, Linux are some examples. And also there are some routers that have the DHCP service enabled.
What is the IP address of the DHCP server?
DHCP server must be assigned a static IP address...On a Windows computer you can find out the IP address of the DHCP server that assigned your current IP address by opening a command prompt and typing "ipconfig /all".
Can you configure two dhcp server on a same network?
yes, one can configure two dhcp server on a same network. But for doing this, one has to define different scopes in both dhcp server in order to avoid ip address conflict. Eg. one can configure a scope for a lan with network address of 10.0.0.0 as- 10.0.0.10- 10.0.0.100 in one dhcp server. while other scope would be 10.0.0.101-10.0.0.200 . In this way we can have to dhcp servers on a same network. Which ever dhcp server receives the request for the ip address will provide the ip address. IN case for servers, one can use mac bindingin both servers so that they obtain same ip address
Which programs can be used to contact a DHCP server in Linux?
The dhcpcd daemon or dhclient.
What is Dora process in DHCP and how it works?
1) Client makes a UDP Broadcast to the server with a DHCPDiscover, or Discover packet. 2) DHCP offers to the client. The server sends a DHCPOffer including other configuration parameters (DHCP Options) for the client per the servers configuration file 3) In response to the offer Client requests the server. The client replies DHCPRequest, unicast to the server, requesting the offered address. 4)The server sends DHCPAck acknowledging the request which is the clients final permission to take the address as offered. Before sending the ack the server double checks that the offered address is still available, that the parameters match the clients request and (if so) marks the address taken. A good reference for DHCP information is Droms and Lemon "The DHCP Handbook". BoydK
What is Dora in networking?
The DHCP Server keeps all the information and data base about the DHCP Cliencts. And it works as folows. ________ ________ | | <-----D------------> Discover-------------> | | |DHCP | <-----O------------> Offer----------------> |DHCP | |SERVER | <-----R------------> Request--------------> |CLIENT | |________| <-----A------------> Acknowledgement------> |________| I want further answers regarding this. please do send me. 1. DHCP automatically Discover the systems , 2. Server Send the offer to the client systems , 3. Client send the Request to Server System, 4. last one Acknowledgement send by Server to Client I would like to make an amendment to that so that it is somewhat further understood in it's entirety. 1st: Hardware sends a broadcast asking for information regarding DHCP servers within the network (or Sub-net of course). 2nd. DHCP server responds saying "Hey, I'm here!" 3rd. Hardware sends a query for an IP address (not the same as the request phase.) 4th. DHCP server comes back with "Here ya go, you can have xxx.xxx.xxx.xxx if you want it!" 5th. Hardware decides that's what it wants, so it requests a lease for that IP address. 6th. DHCP server acknowledges the request and assigns a lease time to that piece of hardware (identified by it's MAC address). 1st through 3rd is done through MAC as the hardware has no IP address and cannot communicate through IP. To do those communications before the IP addresses are assigned they use UDP packets with Source and Destination MAC addresses as beginning and end-points. And DHCP servers don't discover the hardware added, the hardware discovers the DHCP servers. That's DORA in a nutshell.
