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DHCP - Dynamic Host Configuration Protocol, Exams of Nursing

University of OxfordNursing

A comprehensive overview of the dynamic host configuration protocol (dhcp), which is a network protocol used to automatically assign ip addresses and other network configuration parameters to devices on a network. The main goal of dhcp, the parameters set by the dhcp server, the concept of 'lease', the different types of dhcp address allocation (dynamic, automatic, and static), the ports and stages of dhcp, the reliability of dhcp, and the use of dhcp in ipv4 and ipv6 networks. The document also includes information on configuring a router as a dhcp server, troubleshooting dhcp issues, and the differences between slaac and stateless/stateful dhcpv6 configurations. This document could be a valuable resource for network administrators, it professionals, and students studying networking and computer science.

Typology: Exams

2023/2024

Available from 09/21/2024

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CHAPTER 10 DHCP - Dynamic Host
Configuration Protocol
What is the main goal of DHCP? - correct answer ✔✔To dynamically assigning network configurations to
hosts such as assigning IPs on IP networks
What are the parameters set by the DHCP server for a device requesting an address? - correct answer
✔✔Default Gateway
Domain Name
Name Servers
Time Servers
Define the "lease" - correct answer ✔✔a set duration is allowed for a device, which can be reassigned or
altered at the end of one
What is used for long distance assignments? - correct answer ✔✔big routers to repeaters
Dynamic Allocation - correct answer ✔✔DHCP assigns an IP address from a pool of address for a limited
period of time chosen by the server, or until the client tells the DHCP server that it no longer needs the
address
Automatic Allocation - correct answer ✔✔DHCP automatically assigns an IP address permanently to a
device, selecting it from a pool of available addresses.
Static Allocation - correct answer ✔✔A particular IP address is pre-allocated to a single device by an
administrator. DHCP only communicates the IP address to the device.
This is pre-configured. - correct answer ✔✔Static
What type and how many ports does DHCP use? - correct answer ✔✔Two UDP ports: 67 and 68
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Download DHCP - Dynamic Host Configuration Protocol and more Exams Nursing in PDF only on Docsity!

CHAPTER 10 DHCP - Dynamic Host

Configuration Protocol

What is the main goal of DHCP? - correct answer ✔✔To dynamically assigning network configurations to hosts such as assigning IPs on IP networks What are the parameters set by the DHCP server for a device requesting an address? - correct answer ✔✔Default Gateway Domain Name Name Servers Time Servers Define the "lease" - correct answer ✔✔a set duration is allowed for a device, which can be reassigned or altered at the end of one What is used for long distance assignments? - correct answer ✔✔big routers to repeaters Dynamic Allocation - correct answer ✔✔DHCP assigns an IP address from a pool of address for a limited period of time chosen by the server, or until the client tells the DHCP server that it no longer needs the address Automatic Allocation - correct answer ✔✔DHCP automatically assigns an IP address permanently to a device, selecting it from a pool of available addresses. Static Allocation - correct answer ✔✔A particular IP address is pre-allocated to a single device by an administrator. DHCP only communicates the IP address to the device. This is pre-configured. - correct answer ✔✔Static What type and how many ports does DHCP use? - correct answer ✔✔Two UDP ports: 67 and 68

Define the stage of DHCP - correct answer ✔✔Acts according to DORA -Discover -Offer -Request -Acknowledgement Discovery - correct answer ✔✔The client queries the server at address 255.255.255.255 with DHCP**** Offer - correct answer ✔✔The server responds with DHCP**** which includes the clients MAC address, offered IP, subnet mask, lease duration, and the IP of the server making the offer Request - correct answer ✔✔If a client received offers from multiple servers, it will select an offer and request that IP with DHCP****. It will also alert the other servers of which offer it accepted. The other servers will terminate their offers Acknowledgement - correct answer ✔✔Once the server receives DHCPREQUEST it will respond with DHCP****. Once the client receives that packet of data, it will probe the new IP to ensure there are no conflicts. DHCP inform - correct answer ✔✔can be used if the client wants additional DHCP information after DORA DHCP release - correct answer ✔✔can be used optionally to return and terminate an IP address Where can a client find available optional settings? - correct answer ✔✔Through DHCP and BOOT PARAMETERS What makes DHCP reliable? - correct answer ✔✔By allowing renewing leases that have an end What does clients periodically send through unicast? - correct answer ✔✔DHCPREQUEST

A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An employee returns to the office after an absence of one week. When the employee boots the workstation, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain? - correct answer ✔✔FF-FF-FF-FF-FF-FF and 255.255.255. Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period? - correct answer ✔✔dynamic allocation Which set of commands will configure a router as a DHCP server that will assign IPv4 addresses to the 192.168.100.0/23 LAN while reserving the first 10 and the last addresses for static assignment? - correct answer ✔✔ip dhcp excluded-address 192.168.100.1 192.168.100. ip dhcp excluded-address 192.168.101. ip dhcp pool LAN-POOL- network 192.168.100.0 255.255.254. default-router 192.168.100. An administrator issues the commands: Router(config)# interface g0/ Router(config-if)# ip address dhcp What is the administrator trying to achieve? - correct answer ✔✔configuring the router to obtain IP parameters from a DHCPv4 server Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.)

  • correct answer ✔✔-The router is intended to be used as a SOHO gateway. -This is an ISP requirement. A network engineer is troubleshooting hosts on a LAN that are not being assigned an IPv4 address from a DHCP server after a new Ethernet switch has been installed on the LAN. The configuration of the DHCP server has been confirmed as correct and the clients have network connectivity to other networks if a static IP address is configured on each one. What step should the engineer take next to solve the issue? - correct answer ✔✔Confirm that ports on the Layer 2 LAN switch are configured as edge ports.

A host on the 10.10.100.0/24 LAN is not being assigned an IPv4 address by an enterprise DHCP server with the address 10.10.200.10/24. What is the best way for the network engineer to resolve this problem? - correct answer ✔✔Issue the command ip helper-address 10.10.200.10 on the router interface that is the 10.10.100.0/24 gateway. A company uses the method SLAAC to configure IPv6 addresses for the workstations of the employees. A network administrator configured the IPv6 address on the LAN interface of the router. The interface status is UP. However, the workstations on the LAN segment did not obtain the correct prefix and prefix length. What else should be configured on the router that is attached to the LAN segment for the workstations to obtain the information?​ - correct answer ✔✔R1(config)# ipv6 unicast-routing A company uses the SLAAC method to configure IPv6 addresses for the employee workstations. Which address will a client use as its default gateway?​ - correct answer ✔✔the link-local address of the router interface that is attached to the network A network administrator configures a router to send RA messages with M flag as 0 and O flag as 1. Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address? - correct answer ✔✔It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information. A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information? - correct answer ✔✔DHCPv6 INFORMATION-REQUEST An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured? - correct answer ✔✔stateless DHCPv Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv addresses to a host? - correct answer ✔✔ICMPv stateless DHCPv6 - correct answer ✔✔