When a DHCP server is responding to a DHCP Discover message from a client which address does the DHCP server use in its response?

The client discovers a DHCP server by broadcasting a discover message to the limited broadcast address (255.255. 255.255) on the local subnet. If a router is present and configured to behave as a BOOTP relay agent, the request is passed to other DHCP servers on different subnets.

How do DHCP servers respond to a DHCP Discover message?

How do DHCP servers respond to a DHCPDISCOVER message? The client sends a DHCPACK message to all servers with the IP address of the chosen DHCP server. The client sends a DHCPREQUEST message to all servers with the IP address of the chosen DHCP server.

When a DHCP client sends a broadcast message to contact a DHCP server What is the destination address used?

255.255.
Discovery. The DHCP client broadcasts a DHCPDISCOVER message on the network subnet using the destination address 255.255.

Is DHCP broadcast or unicast?

3 Answers. The DHCPOFFER and DHCPACK are normally sent from the server to the client as unicast. The client can set a Broadcast flag to request that the server send broadcast back to the client, but this is not the preferred method.

What is always broadcast DHCP?

Enable the DHCP server to always broadcast all responses. dhcp server always-broadcast. By default, the DHCP server reads the broadcast flag to decide whether to broadcast or unicast a response.

What is the difference between DHCP client and server?

A DHCP client is an Internet host using DHCP to obtain configuration parameters such as an IP address. A DHCP server offers configuration parameters (such as an IP address, a MAC address, a domain name, and a lease for the IP address) to the client in a DHCPOFFER unicast message.

Is DHCP offer message broadcast or unicast?

Should DHCP server always broadcast?

You can configure the DHCP server to ignore the broadcast flag and always broadcast a response. The DHCP server always unicasts a response in the following situations, regardless of whether this feature is configured or not: The DHCP request is from a DHCP client that has an IP address (the ciaddr field is not 0).

What are IPv4 multicast streams?

IP multicast is a method of sending Internet Protocol (IP) datagrams to a group of interested receivers in a single transmission. It is the IP-specific form of multicast and is used for streaming media and other network applications. It uses specially reserved multicast address blocks in IPv4 and IPv6.

How does a DHCP server respond to a DHCP request?

The server accepts the request by sending the client a DHCP Acknowledgment message. If the IPv4 address requested by the DHCP client cannot be used (another device may be using this IPv4 address), the DHCP server responds with a DHCPNak (Negative Acknowledgment) packet.

When does DHCP use broadcast?

Hi, DHCP uses broadcast by nature, when a host needs an ip address on the network it sends a DHCP discover message, this is sent at both l2 and l3 as:

What is DHCPDISCOVER message?

DHCPDiscover Message. DHCP client sends a DHCP Discover broadcast on the network for finding a DHCP server. If there is no respond from a DHCP server, the client assigns itself an Automatic Private IPv4 address (APIPA).

How to broadcast the DHCPOFFER and DHCPACK to the client?

The DHCPOFFER and DHCPACK are normally sent from the server to the client as unicast. The client can set a Broadcast flag to request that the server send broadcast back to the client, but this is not the preferred method. This is detailed in RFC 2131, Dynamic Host Configuration Protocol: