Flashcards
Module 2: Deploy and manage DHCP > Unit: Use DHCP to simplify IP configuration
Cards in this deck (16)
- 1Which settings are configured using DHCP?- IP Address
- Subnet mask
- DNS servers
- Default Gateway - 2When is the DHCP client service running on a Windows computer?When the TCP/IP properties are set to automatically obtain an IP address
- 3How is the period called during which clients can use a DHCP address?A lease
- 4What kind of communication is used to by clients to obtain a DHCP lease?IP Broadcasts
- 5What are the 4 steps in obtaining a DHCP lease?1. DHCPDISCOVER
2. DHCPOFFER
3. DHCPREQUEST
4. DHCPACK - 6Can a DHCP server provide IP configuration on a client on a different network?Yes, but DHCP relays must be configured.
Without relays, this is not possible, because DHCP relies on IP broadcasts, which are not routed by design. - 7Describe the DCHPDISCOVER phase of the DHCP processThe client sends a broadcast message to 255.255.255.255 (the current local network broadcast address), containing a DHCPDISCOVERY packet. DHCP servers respond to this message.
- 8Describe the DHCPOFFER phase of the DHCP processAll DHCP servers which received the DHCPDISCOVER packet, resond with a DHCPOFFER packet, which contains a potential IP address.
- 9Describe the DHCPREQUEST phase of the DHCP processThe client receives a DHCPOFFER message from 1 or more DHCP servers. It picks the first one it receives. The client responds with a DHCPREQUEST that contains the server identifier of the DHCP server it responds to. This is a broadcast message, therefore informing the other DHCP servers that it doesn't accept their DHCPOFFER.
- 10Describe the DHCPACK phase of the DHCP proccessUpon receiving the DHCPREQUEST packet, the DHCP server stores the IP address (which was handed out in the DHCPOFFER phase) in the database. The server sends a DHCPACK message to the client.
- 11Describe the DHCPNAK messageIf a DHCP server was not able to provide the IP address as provided in the DHCPOFFER message, it answers with a DHCPNAK instead of a DHCPACK to the DHCPREQUEST message.
- 12What happens when the DHCP lease reaches 50% of its lease time?The client attempts to renew the lease by sending a unicast DHCPREQUEST to the server that originally handed out the lease.
If in the meantime the DHCP server was updated with new information, this updated information will be handed to the client. - 13What happens when the DHCP lease reaches 87,5% of its lease time?This occurs when the client can not contact the DHCP server at 50% lease time. The client sends a DHCPREQUEST broadcast (instead of unicast) to all DHCP servers for renewal.
- 14What are 2 scenarios where the client attempts DHCP renewal as well?- During startup
- When a network change occurs - 15In DHCPv6, what is stateful configuration?This means that the DHCP server assigns an IPv6 address to the client, along with other information.
- 16In DHCPv6, what is stateless configuration?This means the router assigns an IPv6 address automatically and the DHCP server only assigns other information.
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- User has deleted their subject information Flashcards on Module 2: Deploy and manage DHCP > Unit: Use DHCP to simplify IP configuration, created by Deleted user on 08/10/2022.
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- Deleted user · Oct 2022
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- Oct 8, 2022
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- Created by Rick Schoenman · Oct 6, 2022
- Copied by Rick Schoenman · Oct 8, 2022
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