Network servers DHCP server (Dynamic host configuration
protocol) DNS server (Domain name system /service ) IIS server (Internet information service)
1. Web server 2. Ftp server
Router server RAS & VPN server (Remote access
server ,Virtual private network) Terminal server ISA server 2006( Internet Security &
Acceleration) RIS server (Remote instillation server ) Exchange server 2003
D ynamic Host C onfiguration P rotocol – DHCP
What is DHCP? It gives IP Addresses Automatically to the Clients who is
requesting for an IP Address Centralized IP Address Management DHCP prevents IP address Conflicts and helps conserve the use of
client IP Address on the Network DHCP reduces the complexity and amount of administrative work
by assigning TCP/IP configuration Client IP configuration is updated automatically
IP addresses :- IP addresses can be 1 -Static IP address Addresses that are manually assigned and do not change over time2-Dynamic IP address Addresses that are automatically assigned for a specific period of time and might change
DHCP OPTIONS:-1- AuthorizationIt is a Security Precaution that ensures that only Authorized DHCP Servers can run in the Network. To avoid computers running Illegal DHCP Servers in the network
2-ScopeA scope is a range of IP addresses that are available to be leased to clients
How DHCP Works
1- DHCP Discover : - the DHCP client broadcast in the network if there is any DHCP server present in the network
2- DHCP Offer: the DHCP response and offer one IP address to the client.
3- DHCP Request : the DHCP client will send request to the server to assign the offer IP address >
4- DHCP Acknowledgement: the server send Acknowledgement to client saying the package or IP has given it you.
Note:- (This process is called as DORA Process or four way hand shaking)
What Is a DHCP Reservation? A reservation is a specific IP address, within a scope, that is permanently reserved to a specific DHCP client
What Are DHCP Scope Options? DHCP Scope options are other server addresses given to clients
How DHCP Server & Scope Options Are Applied
Lease Renewal Process
Lease and Renewal Process:
Installing The DHCP:
start -> setting -> control panel
add and remove program ->
add and remove windows component
select network service -> details
check the box on [ √ ] D ynamic H ost C onfiguration P rotocol (DHCP) -> ok -> next
ok -> finish
-TO configure DHCP on server side :- start -> program -> administrative tools -> DHCP
right click on domain name -> authorize
right click on domain name -> refresh right click on domain name -> new scope -> next
give the name of scope -> next
give e the range of the IP Address -> next
if there is any resolve any IP addresses to assign (fixed IP) give range ->add -> next
lease durations -> next
yes I wont to configure these option now -> next
getaway ( if it require )
give the domain name and system name an IP address of DNS server
next -> next -> yes I want to activated -> next
finish
TO configure DHCP on client side:- On TCP/IP -> properties -> select obtain IP address automatic
-> Start -> run type cmd -> type [ipconfig /release] -> Type [ipconfig /renew]-> Type [ipconfig /all]
The resolve IP address:-
The fixit IP Address for client with MAC address 6-7-3-2-To configure resolve IP Address: -> start -> program -> administrative tools -> DHCP expand scope name -> select reservation -> right click -> select NEW
reservation
give the reservation name -> IP Address -> Mac Address -> add -> close
DHCP Backup:-
start -> program -> administrative tools -> DHCP right click on domain name select backup
select the path -> ok
->remove the scope and restore the backup -> right click on domain name select restore
select the path -> ok