2.6 DHCP Flashcards
What does DHCP stand for?
Dynamic Host Configuration Protocol.
What is the primary purpose of DHCP?
Automates IP address assignment, reducing human error and preventing IP conflicts.
What are the four key components DHCP assigns to a device?
IP address, subnet mask, default gateway, and DNS server.
What are the benefits of using DHCP?
Automates network configurations, prevents duplicate IP conflicts, saves time, and provides centralized control.
What is the DORA process in DHCP?
Discover, Offer, Request, Acknowledge.
What happens during the DHCP Discover phase?
The client sends a broadcast request asking for an available IP address.
What happens during the DHCP Offer phase?
The DHCP server offers an available IP address to the client.
What happens during the DHCP Request phase?
The client requests to use the offered IP address.
What happens during the DHCP Acknowledge phase?
The DHCP server confirms the IP assignment and provides lease information.
What is a DHCP lease time?
The duration a client can use an assigned IP before renewal.
What are DHCP reservations?
Assigns a specific IP address to a device based on its MAC address.
Why would you use a DHCP reservation?
To ensure consistent IP addresses for devices like printers, servers, and network devices.
What happens when a device cannot reach a DHCP server?
It self-assigns an APIPA (169.254.x.x) address.
What does an APIPA address (169.254.x.x) indicate?
The device failed to contact a DHCP server.
What is an alternate static IP?
A manually assigned fallback IP in case DHCP is unavailable.
How does DHCP prevent IP conflicts?
It dynamically assigns unique addresses from a predefined pool.
What is a subnet mask in DHCP?
Defines which part of an IP address belongs to the network and which part belongs to the host.
What is the role of a default gateway in DHCP?
Specifies the router’s IP for external network access.
What does DHCP assign for domain name resolution?
DNS server addresses.
When should static IPs be used instead of DHCP?
For critical devices like servers, printers, and network equipment.
What are the disadvantages of static IP assignment?
Time-consuming, prone to human errors, and hard to manage in large networks.
What are the advantages of DHCP?
Fast, automated, prevents conflicts, and allows easy network management.
Why is a DHCP server essential in large networks?
It reduces the administrative workload and prevents duplicate IP issues.
What should you do if a network device has an APIPA address?
Check DHCP server availability, network cables, and router settings.
