70-410 Lesson 11: DHCP questions with correct answers 2023

70-410 Lesson 11: DHCP questions with correct answers 2023Configures the IP address and other TCP/IP settings on network computers Explanation: The Dynamic Host Configuration Protocol (DHCP) service automatically configures the Internet Protocol (IP) address and other TCP/IP settings on network computers by assigning addresses from a pool (called a scope) and reclaiming them when they are no longer in use. What service does Dynamic Host Configuration Protocol (DHCP) provide? Dynamic, automatic, and manual Explanation: The DHCP standards define three different IP address allocation methods: dynamic, automatic, and manual (reservations). DHCP standards define multiple methods to allocate IP addresses. What are they? 100 percent because dynamic address allocation requires periodic lease renewal messages whereas automatic does not Explanation: Automatic allocation reduces network traffic by eliminating the periodic lease renewal messages needed for dynamic allocation. In the Windows Server 2012 R2 DHCP server, automatic allocation is essentially dynamic allocation with an indefinite lease. For DHCP address allocation, by how much is network traffic reduced related to periodic lease renewal messages when switching from dynamic allocation to automatic allocation? Obtain an IP address automatically Explanation: In Windows computers, the DHCP client is enabled by default, although it is not mentioned by name in the interface. The Obtain an IP address automatically option in the Internet Protocol Version 4 (TCP/IPv4) Properties sheet and the Internet Protocol Version 6 (TCP/IPv6) Properties sheet controls the activation of the client for IPv4 and IPv6 respectively. How are DHCP settings labeled in a Windows computer's network interface? DHCPDISCOVER Explanation: When a computer boots for the first time with the DHCP client active, the client generates a series of DHCPDISCOVER messages to solicit an IP address assignment from a DHCP server and broadcasts them on the local network. What is the first packet sent to a DHCP server when a computer boots up? DHCPOFFER Explanation: All DHCP servers receiving the DHCPDISCOVER broadcast messages generate DHCPOFFER messages containing an IP address, and whatever other TCP/IP configuration parameters the server is configured to supply, and then transmit them to the client. How do DHCP servers respond to a DHCPDISCOVER message? The client sends a DHCPREQUEST message to all servers with the IP address of the chosen DHCP server. Explanation: After a specified time, the client stops broadcasting and signals its acceptance of one of the offered addresses by generating a DHCPREQUEST message, containing the address of the server from which it is accepting the offer along with the offered IP address, and then broadcasting it on the local network. This broadcast notifies the selected server that the client is accepting the offered address. It also notifies any other servers on the network that the client is rejecting their offers. How does a DHCP client communicate which offered IP address it will accept from which DHCP server? The server responds with a DHCPNAK message to the client. Explanation: If the server cannot complete the assignment for any reason (for example, because it has already assigned the offered IP address to another system), it transmits a DHCPNAK message to the client, and the whole process begins again. During DHCP lease negotiation, what happens if the client requests an IP address from the server but the server has already assigned the offered IP address? 8 days Explanation: By default, the DHCP Server service in Windows Server 2012 R2 uses dynamic allocation, leasing IP addresses to clients for 8-day periods. What is the default lease period for DHCP dynamic address allocation? 50 percent, or at 4 days into the lease Explanation: When the DHCP client reaches the 50 percent point of the lease's duration (called the renewal time value or T1 value), the client enters the renewing state and begins generating DHCPREQUEST messages and transmitting them as unicasts to the DHCP server holding the lease. DHCP clients also renew their leases each time they restart. How far into the lease period does a DHCP client begin requesting renewal of the IP address? All the client/server network traffic is local, so minimal DHCP traffic on routers Clients have ready access to DHCP servers Explanation: A distributed DHCP infrastructure has distinct advantages: Your clients have ready access to their DHCP servers. You do not have to worry about DHCP traffic adding to the burden of your routers, because all the client/server traffic is local. The potential disadvantage of this arrangement is the need to install and configure a large number of DHCP servers. This is especially true if you plan to have multiple servers on each subnet for fault tolerance. What are the advantages of using a distributed DHCP infrastructure? Add-DhcpServerv4Scope Explanation: To add an IPv4 scope to a DHCP server using Windows PowerShell, you use the Add-DhcpServerv4Scope cmdlet with the following basic syntax: Add-DhcpServerv4Scope -Name <name> -StartRange <address> -EndRange <address> -SubnetMask <mask> -State Active|Inactive. Which Windows PowerShell cmdlets creates an IPv4 DHCP scope? A DHCP scope must be created and activated The DHCP server must be created and authorized. Explanation: A DHCP server must be authorized within the domain before it can hand out addresses. You must then create a scope and then activate the scope before the addresses defined within the scope can be leased out. Before a DHCP server can hand out addresses, which steps must be completed (2)?