3Com OfficeConnect 3CRWDR200A-75 User Manual

Contents

3Com OfficeConnect 3CRWDR200A-75 User Manual Manual pdf 115 page image

How does a Device Obtain an IP Address and Subnet Mask? 115See Table 4 for an example about how a network (only four computersrepresented) and a Router might be configured.Table 4 IP Addressing and Subnet MaskingHow does a DeviceObtain an IPAddress and SubnetMask?There are three different ways to obtain an IP address and the subnetmask. These are:■ Dynamic Host Configuration Protocol (DHCP) Addressing■ Static Addressing■ Automatic Addressing (Auto-IP Addressing)DHCP Addressing The Router contains a DHCP server, which allows computers on yournetwork to obtain an IP address and subnet mask automatically. DHCPassigns a temporary IP address and subnet mask which gets reallocatedonce you disconnect from the network.DHCP will work on any client Operating System such as Windows ® 95,Windows 98 or Windows NT 4.0. Also, using DHCP means that the sameIP address and subnet mask will never be duplicated for devices on thenetwork. DHCP is particularly useful for networks with large numbers ofusers on them.Static Addressing You must enter an IP Address and the subnet mask manually on everydevice. Using a static IP and subnet mask means the address ispermanently fixed.Auto-IP Addressing Network devices use automatic IP addressing if they are configured toacquire an address using DHCP but are unable to contact a DHCP server.Automatic IP addressing is a scheme where devices allocate themselvesan IP address at random from the industry standard subnet of169.254.x.x (with a subnet mask of 255.255.0.0). If two devices allocateDevice IP Address Subnet MaskPC 1 192.168.1.8 255.255.0.0PC 2 192.168.201.30 255.255.0.0PC 3 192.168.113.155 255.255.0.0PC 4 192.168.002.230 255.255.0.0Router 192.168.002.72 255.255.0.0