(ITI310)

By Eng. BASSEM ALSAID

SESSIONS 9: Dynamic Host Configuration Protocol (DHCP)

“Dynamic Host Configuration Protocol (DHCP)”

objectives in this session:- Installing the DHCP Server Role.- Authorizing DHCP Servers in Active Directory.- Understanding DHCP Scope Types.- Configuring IPv4 Scopes Using the DHCP Console.- Configuring DHCP Reservations.

“Dynamic Host Configuration Protocol (DHCP)”

The purpose of Dynamic Host Configuration Protocol (DHCP) is to provide TCP/IP configuration information to clients.

A DHCP server within a Windows Server 2008 domain will typically provide the following information to clients:•IP address•Subnet mask•Default gateway•DNS domain name•Address of DNS server•Address of WINS server•And possibly more information.

REMINDER

DORA process: (D)iscover DHCP (O)ffer DHCP (R)equest DHCP (A)ck

Practice I: Installing DHCP

DHCP Scope TypesDHCP scopes are used to define ranges of addresses from which a DHCP server can assign IP addresses to clients. Scopes fall into Normal, Multicast and Super Scope categories as follows: •Normal Scope - Allows A, B and C Class IP address ranges to be specified including subnet masks, exclusions and reservations. •Multicast Scope - Used to assign IP address ranges for Class D networks. Multicast scopes do not have subnet masks, reservation or other TCP/IP options. Multicast scope address ranges require that a Time To Live (TTL) value be specified (essentially the number of routers a packet can pass through on the way to its destination). •Super Scope - Essentially a collection of scopes grouped together such that they can be enabled and disabled as a single entity.

CLASS D networks

Class D: 224.0.0.0 to 239.255.255.255

The IPv4 networking standard defines Class D addresses as reserved for multicast. Multicast is a mechanism for defining groups of nodes and sending IP messages to that group rather than to every node on the LAN (broadcast) or just one other node (unicast).

Practice II: Creating a DHCP Scope

DHCP Reservation

DHCP reservations provide a mechanism by which IP addresses may be permanently assigned to a specific client based on the MAC address of that client.

DHCP ManagementWhen planning for the management of DHCP, you need to consider two built-in groups. Both groups are in the Users container within Active Directory Users and Computers. They are as follows:•DHCP Administrators: Users in the DHCP Administrators group can fully administer DHCP with one exception. DHCP Administrators cannot authorize a DHCP server. DHCP administrators can create and modify scopes, add and modify options, add scope options, and add and modify reservations. If an administrator is assigned responsibility for a DHCP, he should be added to the DHCP Administrators group.•DHCP Users: The DHCP Users group can view but not modify settings and information within the DHCP console.

You have a Windows Server 2008 Core loaded on a server. You just installed DHCP on the server. How do you configure the DHCP scopes?

A. Run the script dhcp.wsf.B. Modify the C:\windows\system32\etc\hosts file with Notepad.C. Connect to the DHCP server with a DHCP MMC console that connects to the DHCP server.D. You don’t need to configure DHCP because it is self configuring.

EXERCISE I

NEXT SESSION

C7: SATURDAY 27-Jun-2015 12:00C8: SATURDAY 27-Jun-2015 12:00

Title: “Internet Information Server (IIS)”

THANKS