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ECMM6018 Enterprise Networking for Electronic Commerce Tutorial 7

ECMM6018 Enterprise Networking for Electronic Commerce Tutorial 7. Dynamic Host Protocol. What Is It. A protocol for assigning dynamic IP addresses to devices on a network Devices can be workstations, servers, routers, printers

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ECMM6018 Enterprise Networking for Electronic Commerce Tutorial 7

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  1. ECMM6018Enterprise Networking for Electronic CommerceTutorial 7 Dynamic Host Protocol

  2. What Is It • A protocol for assigning dynamic IP addresses to devices on a network • Devices can be workstations, servers, routers, printers • A device can have a different IP address every time it connects to the network • It supports a mix of static and dynamic IP addresses e.g. Web server needs a static IP address

  3. Why Use It • The Growing size of Networks • Requires Less Human Interaction • Less Prone To Error • Portability

  4. Who Uses It • Internet Service Providers • Universities • Large Corporations and Organizations • Anyone who has to deal with a large range of Internet Addresses

  5. DHCP Server • Server which issues IP addresses to devices when they connect to the network • Configuration file - This contains a range of options to send to the client machine

  6. DHCP Server Configuration File subnet 192.168.1.0 netmask 255.255.255.0 { # The range of IP addresses the server # will issue to DHCP enabled PC clients # booting up on the network range 192.168.1.201 192.168.1.220; # Set the amount of time in seconds that # a client may keep the IP address default-lease-time 86400;max-lease-time 86400;

  7. DHCP Server Configuration File # Set the default gateway to be used by # the PC clients option routers 192.168.1.1; # Don't forward DHCP requests from this # NIC interface to any other NIC # interfaces option ip-forwarding off; # Set the broadcast address and subnet mask # to be used by the DHCP clients option broadcast-address 192.168.1.255;option subnet-mask 255.255.255.0;

  8. DHCP Server Configuration File Set the DNS server to be used by the # DHCP clients option domain-name-servers 192.168.1.100; # Set the NTP server to be used by the # DHCP clients option nntp-server 192.168.1.100; # If you specify a WINS server for your Windows clients, # you need to include the following option in the dhcpd.conf file:option netbios-name-servers 192.168.1.100; }

  9. DHCP Server Configuration File host MEC-1 { hardware ethernet 08:00:2b:4c:59:23;fixed-address 192.168.1.222; }

  10. DHCP Client • Broadcasts DHCPDISCOVER request on the network • Listening DHCP Server issues a DHCPOFFER response • The server then assigns an IP address to that DHCP client machine

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