Chapter 11 Configuring Dynamic Host Configuration Protocol

Chapter 11 Configuring Dynamic Host Configuration Protocol
MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam Chapter 11 Configuring Dynamic Host Configuration Protocol Chapter 11 Configuring Dynamic Host Configuration Protocol

Objectives Describe the DHCP protocol and process
Install and configure a DHCP server Configure DHCP server settings Configure a DHCP relay agent Objectives Describe the DHCP protocol and process Install and configure a DHCP server Configure DHCP server settings Configure a DHCP relay agent MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

An Overview of Dynamic Host Configuration Protocol
Dynamic Host Configuration Protocol (DHCP) is a component of the TCP/IP protocol suite Used to assign an IP address to a host automatically from a defined pool of addresses IP addresses assigned via DHCP are usually leased, not permanently assigned To prevent a disruption in communication, the client attempts to renew the lease when the lease interval is 50% expired DHCP is based on broadcast packets An Overview of Dynamic Host Configuration Protocol Dynamic Host Configuration Protocol (DHCP) is a component of the TCP/IP protocol suite Used to assign an IP address to a host automatically from a defined pool of addresses IP addresses assigned via DHCP are usually leased, not permanently assigned To prevent a disruption in communication, the client attempts to renew the lease when the lease interval is 50% expired DHCP is based on broadcast packets MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

The DHCP Assignment Process
The request for an IP address between a DHCP client and a DHCP server is a 4-packet sequence: 1) DHCPDISCOVER - client transmits a broadcast packet via UDP source port 68 and UDP destination port 67 to the network 2) DHCPOFFER - DHCP server received the DHCPDISCOVER packet and responds with an offer 3) DHCPREQUEST - client responds by requesting the offered address 4) DHCPACK - the server acknowledges the transaction and sends IP parameters to the client The DHCP Assignment Process The request for an IP address between a DHCP client and a DHCP server is a 4-packet sequence: 1) DHCPDISCOVER - client transmits a broadcast packet via UDP source port 68 and UDP destination port 67 to the network 2) DHCPOFFER - DHCP server received the DHCPDISCOVER packet and responds with an offer 3) DHCPREQUEST - client responds by requesting the offered address 4) DHCPACK - the server acknowledges the transaction and sends IP parameters to the client MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-1 The packet sequence for DHCP address assignment
MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

DHCP Address Renewal A client uses unicast packets rather than broadcast packets in the lease renewal process The client already knows the address of the server A successful renewal is a 2-packet sequence: 1) DHCPREQUEST - when the lease is 50% expired, the client sends a unicast packet to request a renewal If server doesn’t respond, client will try 3 more times 2) DHCPPACK - if server can honor the renewal request, will send a unicast packet granting and acknowledging the renewal request DHCP Address Renewal A client uses unicast packets rather than broadcast packets in the lease renewal process The client already knows the address of the server A successful renewal is a 2-packet sequence: 1) DHCPREQUEST - when the lease is 50% expired, the client sends a unicast packet to request a renewal If server doesn’t respond, client will try 3 more times 2) DHCPPACK - if server can honor the renewal request, will send a unicast packet granting and acknowledging the renewal request MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

DHCP Address Renewal The renewal request may fail in these situations:
The server responds but can’t honor the renewal The requested address may have been deleted or deactivated from the scope The server doesn’t respond 1) The client keeps its current address until 87.5% of the lease interval has expired and sends out a DHCPREQUEST broadcast packet 2) Two possible results from the DHCPREQUEST A DHCP server responds No DHCP server responds and client starts the process all over again DHCP Address Renewal The renewal request may fail in these situations: The server responds but can’t honor the renewal The requested address may have been deleted or deactivated from the scope The server doesn’t respond 1) The client keeps its current address until 87.5% of the lease interval has expired and sends out a DHCPREQUEST broadcast packet 2) Two possible results from the DHCPREQUEST A DHCP server responds No DHCP server responds and client starts the process all over again MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

DHCP Messages Table 11-2 DHCP Message Types DHCP Messages

Installing and Configuring a DHCP Server
DHCP Server role can be installed by using the Add Roles and Features Wizard via Server Manager After installing, the DHCP console is available on the Tools menu in Server Manager In a Windows domain, the DHCP server must be authorized, and a scope must be created before the server can provide DHCP services Installing and Configuring a DHCP Server DHCP Server role can be installed by using the Add Roles and Features Wizard via Server Manager or the following PowerShell cmdlet: Install -WindowsFeature DHCP -IncludeManagementTools After installing, the DHCP console is available on the Tools menu in Server Manager In a Windows domain, the DHCP server must be authorized, and a scope must be created before the server can provide DHCP services MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-2 The DHCP console

DHCP Server Authorization
DHCP clients have no way of determining whether a DHCP server is valid Reason for authorization: A rogue DHCP server could be installed on a network and incorrect IP address settings could be configured on client computers DHCP server authorization requires Enterprise Administrator credentials DHCP Server Authorization DHCP clients have no way of determining whether a DHCP server is valid Reason for authorization: A rogue DHCP server could be installed on a network and incorrect IP address settings could be configured on client computers DHCP server authorization requires Enterprise Administrator credentials To authorize with PowerShell, type: Add -DhcpServerInDC MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

DHCP Scopes DHCP scope - a pool of IP addresses and other IP configuration parameters that a DHCP server uses to lease addresses to DHCP clients A scope consists of the following required parameters: Scope name Start and end IP addresses Prefix length or subnet mask Lease duration - specifies how long a DHCP client can keep an address DHCP Scopes DHCP scope - a pool of IP addresses and other IP configuration parameters that a DHCP server uses to lease addresses to DHCP clients A scope consists of the following required parameters: Scope name Start and end IP addresses Prefix length or subnet mask Lease duration - specifies how long a DHCP client can keep an address MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Exclusion Ranges Addresses can be excluded in two ways:
De facto exclusion - you set the start and end IP addresses in the scope so that several addresses in the subnet fall outside the scope’s range Create an exclusion range - consists of one or more addresses in the scope that the DHCP server doesn’t least to clients They can be created when the scope is created with the New Scope Wizard or afterward by right-clicking the Address Pool node under the scope and clicking New Exclusion Range Exclusion Ranges Addresses can be excluded in two ways: De facto exclusion - you set the start and end IP addresses in the scope so that several addresses in the subnet fall outside the scope’s range Create an exclusion range - consists of one or more addresses in the scope that the DHCP server doesn’t least to clients They can be created when the scope is created with the New Scope Wizard or afterward by right-clicking the Address Pool node under the scope and clicking New Exclusion Range MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Reservations Reservation - an IP address associated with the MAC address of a DHCP client to ensure that when the client requests an IP address, it always gets the same one The IP address in the reservation must fall within the same subnet and use the same subnet mask as the scope You can force a client to release a reserved address and get a different address by typing: ipconfig /release and then ipconfig /renew Reservations Reservation - an IP address associated with the MAC address of a DHCP client to ensure that when the client requests an IP address, it always gets the same one The IP address in the reservation must fall within the same subnet and use the same subnet mask as the scope You can force a client to release a reserved address and get a different address by typing: ipconfig /release and then ipconfig /renew MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Multiple Subnets, Multiple Scopes
A DHCP scope can service a single subnet DHCP is based on broadcasts, which can’t traverse routers Three methods for handling a network with multiple subnets: Configure a DHCP server in each subnet Configure a single DHCP server with network interfaces connected to each subnet and scopes defined for each subnet Configure DHCP relay agents on subnets that don’t have a DHCP server Multiple Subnets, Multiple Scopes A DHCP scope can service a single subnet DHCP is based on broadcasts, which can’t traverse routers Three methods for handling a network with multiple subnets: Configure a DHCP server in each subnet Configure a single DHCP server with network interfaces connected to each subnet and scopes defined for each subnet Configure DHCP relay agents on subnets that don’t have a DHCP server MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-3 A server configured with multiple scopes

Split Scopes Split scope - a fault-tolerant DHCP configuration in which two DHCP servers share the same scope information Allows both servers to offer services to clients Create a split scope by using the wizard as follows: 1) Install the DHCP Server role on two servers 2) Create a scope on the first server and activate it The wizard configures the scope on the second server 3) Run the wizard on the first server Split Scopes Split scope - a fault-tolerant DHCP configuration in which two DHCP servers share the same scope information Allows both servers to offer services to clients Create a split scope by using the wizard as follows: 1) Install the DHCP Server role on two servers 2) Create a scope on the first server and activate it The wizard configures the scope on the second server 3) Run the wizard on the first server MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Split Scopes Create a split scope by using the wizard as follows (cont’d): 4) The wizard creates the scope on the secondary server and creates the necessary exclusion range According to the split percentage on both servers 5) Create reservations on both servers Split Scopes Create a split scope by using the wizard as follows (cont’d): 4) The wizard creates the scope on the secondary server and creates the necessary exclusion range According to the split percentage on both servers 5) Create reservations on both servers MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-4 Setting the percentage of split

Superscopes Superscope - a special type of scope consisting of one or more member scopes that allow a DHCP server to service multiple IPv4 subnets on a single physical network Directs the DHCP server to draw addresses from both scopes Useful if the number of computers on a physical network exceeds the size of the original subnet Each scope that’s part of a superscope is referred to as a “member scope” Superscopes Superscope - a special type of scope consisting of one or more member scopes that allow a DHCP server to service multiple IPv4 subnets on a single physical network Directs the DHCP server to draw addresses from both scopes Useful if the number of computers on a physical network exceeds the size of the original subnet Each scope that’s part of a superscope is referred to as a “member scope” MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

DHCP Options DHCP options can be assigned at the following levels:
Server options - affect all scopes but can be overridden by a scope, policy, or reservation option Scope options - affect clients that get a lease from the scope in which the option is configured Policy options - allow an administrator to assign IP address options to clients based on client properties Reservation options - based on a computer’s MAC address Take precedence over any conflicting options set at any other level DHCP Options DHCP options can be assigned at the following levels: Server options - affect all scopes but can be overridden by a scope, policy, or reservation option Scope options - affect clients that get a lease from the scope in which the option is configured Policy options - allow an administrator to assign IP address options to clients based on client properties Reservation options - based on a computer’s MAC address Take precedence over any conflicting options set at any other level MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Common DHCP Options DHCP options are specified in the format NNNOptionName NNN represents a three-digit number that identifies the option in the DHCP packet Common options: 003 Router 006 DNS Servers 015 DNS Domain Name 044 WINS/NBNS Servers 046 WINS/NBT node type Common DHCP Options DHCP options are specified in the format NNNOptionName NNN represents a three-digit number that identifies the option in the DHCP packet Common options: 003 Router 006 DNS Servers 015 DNS Domain Name 044 WINS/NBNS Servers 046 WINS/NBT node type MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Configuring Options Server options are configured by clicking the IPv4 or IPv6 node in the DHCP console Right-click Server Options, click Configure Options The Server options dialog box has two tabs: General - has a list of available options in the upper pane Advanced - has the same list of options as well as a list box to choose the Vendor Class A field in the DHCP packet that is used to identify a device model or an OS version Configuring Options Server options are configured by clicking the IPv4 or IPv6 node in the DHCP console Right-click Server Options, click Configure Options The Server options dialog box has two tabs: General - has a list of available options in the upper pane Advanced - has the same list of options as well as a list box to choose the Vendor Class A field in the DHCP packet that is used to identify a device model or an OS version MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-11 The Server Options dialog box

DHCP Server Configuration
When performing DHCP server configuration tasks, right-click the server node and you can choose from the following tasks: Add/Remove Binding Backup Restore All Tasks Delete Refresh Properties DHCP Server Configuration When performing DHCP server configuration tasks, right-click the server node and you can choose from the following tasks: Add/Remove Binding Backup Restore All Tasks Delete Refresh Properties MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-12 The Server Bindings Properties dialog box

DHCP Server Configuration
Right-click the IPv4 node and you can choose from the following options: Display Statistics New Scope New Superscope New Multicast Scope Configure Failover and Replicate Failover Scopes Define User Classes and Define Vendor Classes Reconcile All Scopes Set Predefined Options Properties DHCP Server Configuration Right-click the IPv4 node and you can choose from the following options: Display Statistics New Scope New Superscope New Multicast Scope Configure Failover and Replicate Failover Scopes Define User Classes and Define Vendor Classes Reconcile All Scopes Set Predefined Options Properties MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-13 Server statistics

Configuring IPv4 Server Properties
The IPv4 Properties dialog box has six tabs: General - specify statistics and logging parameters DNS - configure how DHCP interacts with a DNS server for making updates on behalf of DHCP clients Network Access Protection (NAP) - enable or disable NAP on all scopes Filters - configure MAC address filters to allow or deny DHCP services to computers Failover - configure and view failover status Advanced - offers many advanced options Configuring IPv4 Server Properties The IPv4 Properties dialog box has six tabs: General - specify statistics and logging parameters DNS - configure how DHCP interacts with a DNS server for making updates on behalf of DHCP clients Network Access Protection (NAP) - enable or disable NAP on all scopes Filters - configure MAC address filters to allow or deny DHCP services to computers Failover - configure and view failover status Advanced - offers many advanced options MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-16 The DNS tab Figure 11-16 The DNS tab

Figure 11-18 The Advanced tab

Configuring Scope Properties
The Scope Properties dialog box has four tabs: General - change the scope name and the start and end IP addresses DNS - contains dynamic DNS configuration options Network Access Protection - enable or disable NAP on the scope Advanced - configure which type of clients the server responds to Configuring Scope Properties The Scope Properties dialog box has four tabs: General - change the scope name and the start and end IP addresses DNS - contains dynamic DNS configuration options Network Access Protection - enable or disable NAP on the scope Advanced - configure which type of clients the server responds to MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-20 The Advanced tab for scope properties

Configuring Filters DHCP filters - allow administrators to restrict which computers on a network are leased IP addresses Filters use MAC addresses as the filtering criteria Filters are configured under the IPv4 node and are not available for IPv6 DHCP If you create an allow filter, only a device with a MAC address in the filter can lease an IP address from the DHCP server If you create a deny filter, all devices except those with a MAC address in the filter can lease an address Configuring Filters DHCP filters - allow administrators to restrict which computers on a network are leased IP addresses Filters use MAC addresses as the filtering criteria Filters are configured under the IPv4 node and are not available for IPv6 DHCP If you create an allow filter, only a device with a MAC address in the filter can lease an IP address from the DHCP server If you create a deny filter, all devices except those with a MAC address in the filter can lease an address MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Configuring Policies DHCP policies - give administrators more fine-tuned control over address lease options Contain conditions that specify one or more clients that IP address settings should be delivered to Policy conditions can be created with any combination of the following: Vendor Class User Class MAC address Client identifier Fully qualified domain name Relay agent information Configuring Policies DHCP policies - give administrators more fine-tuned control over address lease options Contain conditions that specify one or more clients that IP address settings should be delivered to Policy conditions can be created with any combination of the following: Vendor Class User Class MAC address Client identifier Fully qualified domain name Relay agent information MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Configuring Policies Policies can be configured at the server level or the scope level Scope-level policies take precedence over server-level policies if both are configured and there’s a conflict Server-level policies are limited to assigning DHCP options and lease duration to clients matching the policy conditions Configuring Policies Policies can be configured at the server level or the scope level Scope-level policies take precedence over server-level policies if both are configured and there’s a conflict Server-level policies are limited to assigning DHCP options and lease duration to clients matching the policy conditions MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Configuring Policies To create a policy, right-click the Policies node under the IPv4 node or the scope and click New Policy to start the DHCP Policy Configuration Wizard, then follow these steps: 1) Give the policy a name and description 2) Create one or more conditions that identify devices 3) Configure settings for the policy 4) Configure additional settings in the policy’s Properties dialog box Configuring Policies To create a policy, right-click the Policies node under the IPv4 node or the scope and click New Policy to start the DHCP Policy Configuration Wizard, then follow these steps: 1) Give the policy a name and description 2) Create one or more conditions that identify devices 3) Configure settings for the policy 4) Configure additional settings in the policy’s Properties dialog box MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

DHCP Relay Agents DHCP relay agent - a device that listens for broadcast DHCPDISCOVER and DHCPREQUEST messages and forwards them to a DHCP server on another subnet You can configure a DHCP relay agent on a subnet that doesn’t have a DHCP server You can still manage DHCP addresses from a central server without having to configure the DHCP server with network interfaces in each subnet DHCP Relay Agents DHCP relay agent - a device that listens for broadcast DHCPDISCOVER and DHCPREQUEST messages and forwards them to a DHCP server on another subnet You can configure a DHCP relay agent on a subnet that doesn’t have a DHCP server You can still manage DHCP addresses from a central server without having to configure the DHCP server with network interfaces in each subnet MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Figure 11-25 DHCP relay agents

DHCP Relay Agents DHCP relay process:
1. A client on the same subnet as the relay agent sends a DHCPDISCOVER broadcast 2. The relay agent forwards the message to the DHCP server’s IP address as a unicast 3. The DHCP server receives the message and since the relay agent’s address is in the message, the server knows to draw an address from the scope matching the relay agent’s IP address 4. The DHCP server sends a unicast DHCPOFFER to the subnet the message was received from DHCP Relay Agents DHCP relay process: 1. A client on the same subnet as the relay agent sends a DHCPDISCOVER broadcast 2. The relay agent forwards the message to the DHCP server’s IP address as a unicast 3. The DHCP server receives the message and since the relay agent’s address is in the message, the server knows to draw an address from the scope matching the relay agent’s IP address 4. The DHCP server sends a unicast DHCPOFFER to the subnet the message was received from MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

DHCP Relay Agents DHCP relay process (cont’d):
5. The relay agent forwards the DHCPOFFER as a broadcast to the subnet it was received from 6. The DHCP client broadcasts a DHCPREQUEST 7. The relay agent forwards it to the DHCP server 8. The server replies with a DHCPACK to the relay agent 9. The relay agent forwards the DHCPACK to the client 10. Renewal requests are unicast packets, so the client can communicate directly with the server DHCP Relay Agents DHCP relay process (cont’d): 5. The relay agent forwards the DHCPOFFER as a broadcast to the subnet it was received from 6. The DHCP client broadcasts a DHCPREQUEST 7. The relay agent forwards it to the DHCP server 8. The server replies with a DHCPACK to the relay agent 9. The relay agent forwards the DHCPACK to the client 10. Renewal requests are unicast packets, so the client can communicate directly with the server MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Installing a DHCP Relay Agent
The DHCP relay agent function is configured as part of the Routing role service under the Remote Access server role To make a Windows Server 2012/R2 server a DHCP relay agent, follow these steps: 1. Install the Remote Access server role and include the Routing role service 2. In the Routing and Remote Access console, right-click the server node and click Configure and Enable Routing and Remote Access 3. Click Custom configuration in the Routing and Remote Access Server Setup Wizard Installing a DHCP Relay Agent The DHCP relay agent function is configured as part of the Routing role service under the Remote Access server role To make a Windows Server 2012/R2 server a DHCP relay agent, follow these steps: 1. Install the Remote Access server role and include the Routing role service 2. In the Routing and Remote Access console, right-click the server node and click Configure and Enable Routing and Remote Access 3. Click Custom configuration in the Routing and Remote Access Server Setup Wizard MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

To make a Windows Server 2012/R2 server a DHCP relay agent, follow these steps (cont’d): 4. Click the LAN routing check box, click Next and then Finish and click Start service when prompted 5. In the Routing and Remote Access console, expand the IPv4 node and right-click General node and click New Routing Protocol 6. In the Routing and Remote Access console, right-click DHCP Relay Agent and click New Interface 7. In the DHCP Relay Properties dialog box, accept the default settings and click OK Installing a DHCP Relay Agent To make a Windows Server 2012/R2 server a DHCP relay agent, follow these steps (cont’d): 4. Click the LAN routing check box, click Next and then Finish and click Start service when prompted 5. In the Routing and Remote Access console, expand the IPv4 node and right-click General node and click New Routing Protocol 6. In the Routing and Remote Access console, right-click DHCP Relay Agent and click New Interface 7. In the DHCP Relay Properties dialog box, accept the default settings and click OK MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

To make a Windows Server 2012/R2 server a DHCP relay agent, follow these steps (cont’d): 8. In the Routing and Remote Access console, right-click the DHCP Relay Agent and click Properties Type the address of the DHCP server the relay agent should forward DHCP messages to and click Add You can add more than one address if you’re using load balancing Click OK Installing a DHCP Relay Agent To make a Windows Server 2012/R2 server a DHCP relay agent, follow these steps (cont’d): 8. In the Routing and Remote Access console, right-click the DHCP Relay Agent and click Properties Type the address of the DHCP server the relay agent should forward DHCP messages to and click Add You can add more than one address if you’re using load balancing Click OK MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Summary Dynamic Host Configuration Protocol (DHCP) is a component of the TCP/IP protocol suite that is used to assign an IP address to a host automatically from a defined pool of addresses The process of a DHCP client requesting an IP address and a DHCP server fulfilling the request is a four-packet sequence of broadcasts The DHCP service is installed as a server role named DHCP Server A DHCP scope is a pool of IP addresses and other IP configuration parameters that a DHCP server uses to lease addresses to DHCP clients Summary Dynamic Host Configuration Protocol (DHCP) is a component of the TCP/IP protocol suite that is used to assign an IP address to a host automatically from a defined pool of addresses The process of a DHCP client requesting an IP address and a DHCP server fulfilling the request is a four-packet sequence of broadcasts The DHCP service is installed as a server role named DHCP Server A DHCP scope is a pool of IP addresses and other IP configuration parameters that a DHCP server uses to lease addresses to DHCP clients MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Summary A split scope is a fault-tolerant DHCP configuration in which two DHCP servers share the same scope information Almost every network requires a DNS server’s IP address for name resolution and a default gateway to communicate with other subnets and the Internet Server options are configured in the DHCP console You can perform several DHCP server configuration tasks in the DHCP console The IPv4 server properties include statistics and logging parameters, dynamic DNS configuration, NAP configuration, filters, conflict detection, and configuration of DNS registration credentials Summary A split scope is a fault-tolerant DHCP configuration in which two DHCP servers share the same scope information Almost every network requires a DNS server’s IP address for name resolution and a default gateway to communicate with other subnets and the Internet Server options are configured in the DHCP console You can perform several DHCP server configuration tasks in the DHCP console The IPv4 server properties include statistics and logging parameters, dynamic DNS configuration, NAP configuration, filters, conflict detection, and configuration of DNS registration credentials MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Summary DHCP filters allow administrators to restrict which computers on a network are leased an IP address based on the client MAC address DHCP policies give you more fine-tuned control of address lease options than you have with server, scope, and reservation options If you’re using Windows Deployment Services to install Windows OSs on computers, you might need to configure DHCP to respond to Preboot Execution Environment network interfaces A DHCP relay agent is a device that listens for broadcast DHCPDISCOVER and DHCPREQUEST messages and forwards them to a DHCP server on another subnet Summary DHCP filters allow administrators to restrict which computers on a network are leased an IP address based on the client MAC address DHCP policies give you more fine-tuned control of address lease options than you have with server, scope, and reservation options If you’re using Windows Deployment Services to install Windows OSs on computers, you might need to configure DHCP to respond to Preboot Execution Environment network interfaces A DHCP relay agent is a device that listens for broadcast DHCPDISCOVER and DHCPREQUEST messages and forwards them to a DHCP server on another subnet MCSA Guide to Installing and Configuring Windows Server 2012/R2, Exam

Chapter 11 Configuring Dynamic Host Configuration Protocol

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