User manual HP LASERJET 3055 ALL-IN-ONE

[. . . ] HP LaserJet 3050/3052/3055/3390/3392 All-in-One User Guide HP LaserJet 3050/3052/3055/3390/3392 All-in-One User Guide Copyright and License © 2006 Copyright Hewlett-Packard Development Company, LP Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained in this document is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. [. . . ] InterNIC has been contracted by the National Science Foundation to manage the Internet addresses and domains. Network addresses are distributed to organizations that are in turn responsible for making sure all attached devices or hosts on the network are properly numbered. For more information about the network portion of an IP address, see IP address structure and class and Subnets in this section. IP address: host portion Host addresses numerically identify specific network interfaces on an IP network. Usually a host has only one network interface; thus, only one IP address. Because no two devices can share the same number at the same time, administrators typically maintain address tables to assure correct assignment of addresses in the host network. IP address structure and class An IP address is comprised of 32 bits of information and divided into 4 sections containing 1 byte each section or 4 bytes total: xxx. xxx. xxx. xxx For efficiency in routing, networks were broken down into three classes, so routing can begin simply by identifying the leading byte of information in the IP address. The network class determines what each of the four IP address sections identify as shown below: Table 9-7 IP address class format Class First Address Byte xxx. Host. A B C As illustrated in Table 9-8 Network class characteristics, each network class differs by the leading bit identifier, the address range, the number of each type available, and the maximum number of hosts each class allows. 184 Chapter 9 Networking ENWW Table 9-8 Network class characteristics Class Network Class Characteristics 0 10. Address Range Maximum Number of Maximum Hosts in Networks in the Class the Network 126. 192. 0. 0. 0 to 223. 255. 255. 255. Configuring IP parameters TCP/IP configuration parameters (such as IP address, subnet mask, default gateway) can be configured on the all-in-one in a variety of ways. These values can be configured manually (for example, through Telnet, the embedded Web server, the arp and ping commands, and HP management software), or they can be automatically downloaded using DHCP or BOOTP each time the all-in-one is turned on. When powered on, a new all-in-one that is unable to retrieve a valid IP address from the network will automatically assign itself a default IP address. The default IP address will depend on the type of network to which the all-in-one is connected. On a small private network, a technique called link-local addressing is used to assign a unique IP address in the range of 169. 254. 1. 0 to 169. 254. 254. 255, which should be valid. On a large or enterprise network, a temporary address of 192. 0. 0. 192 will be assigned until it is properly configured for your network. The IP address configured on your all-in-one may be determined by inspecting the all-in-one Configuration page. Dynamic Host Configuration Protocol (DHCP) DHCP allows a group of devices to use a set of IP addresses that are maintained by a DHCP server. The device or host sends a request to the server, and if an IP address is available, the server assigns it to that device. BOOTP BOOTP is a bootstrap protocol used to download configuration parameters and host information from a network server. In order for devices to boot and load configuration information into RAM, they must communicate through the bootstrap protocol BOOTP as a client with their server. To configure the all-in-one, the client broadcasts a boot request packet containing at least the hardware address of the all in one (all-in-one hardware address). The server answers with a boot reply packet containing the information the all-in-one needs to configure. ENWW TCP/IP 185 Subnets When an IP network address for a particular network class is assigned to an organization, no provision is made for more than one network being present at that location. Local network administrators use subnets to partition a network into several different subnetworks. Splitting a network into subnets can result in better performance and improved use of limited network address space. Subnet mask The subnet mask is a mechanism used to divide a single IP network into several different subnetworks. For a given network class, a portion of an IP address that would normally be used to identify a node is used, instead, to identify a subnetwork. [. . . ] Readiris An optical character recognition (OCR) program that was developed by I. R. I. S. shared line The sharpness of an image, measured in dots per inch (dpi). The higher the dpi, the greater the A single telephone line that is used for both voice and fax calls. surge protector A device that protects a power supply and communications lines from electrical surges. 396 Glossary ENWW TWAIN An industry standard for scanners and software. By using a TWAIN-compliant scanner with a TWAINcompliant program, a scan can be initiated from within the program. [. . . ]