3Com OfficeConnect 3CRWE554G72 User Manual

Contents

How does a Device Obtain an IP Address and Subnet Mask? 97This type of IP Address operates on a subnet mask of ‘255.255.0.0’.See Table 5 for an example about how a network (only four computersrepresented) and a Gateway might be configured.Table 5 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 Gateway 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 themselvesDevice IP Address Subnet MaskPC 1 192.168.100.8 255.255.0.0PC 2 192.168.201.30 255.255.0.0PC 3 192.168.113.155 255.255.0.0PC 4 192.168.002.230 255.255.0.0Gateway 192.168.002.72 255.255.0.0