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Topic: Logical address

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	Logical address - Wikipedia, the free encyclopedia
		A logical address or virtual address is a memory location accessed by an application program in a system with virtual memory such that intervening computer hardware and/or software maps the virtual address to real (physical) memory.
		During the course of execution of an application, the same virtual address may be mapped to many different physical addresses as data and programs are paged out and paged in to other locations.
		Logical address or virtual address is also used in IBM's VM operating system and in Virtual Device Location.
	en.wikipedia.org /wiki/Logical_memory (139 words)

	Encyclopedia :: encyclopedia : Logical positivism (Site not responding. Last check: 2007-10-01)
		Logical positivism (later referred to as logical empiricism, also referred to as neo-positivism) is a philosophy (of science) that originated in the Vienna Circle in the 1920s.
		Logical positivism was one of the early manifestations of analytic philosophy.
		Logical Positivism was immensely influential in philosophy of science, logic, and philosophy of language.
	www.hallencyclopedia.com /Logical_positivism (1086 words)

	pansiot-logical-addressing-01.txt
		Logical Routing Data Structures One role of the LAR entity is to dynamically map LAR addresses and IPv6 addresses, in presence of network-level changes.
		Sending to a logical object A LAR packet sent by a node S to a logical object D (tree or neighbor in case of unicast) is encapsulated in a IPv6 packet.
		At the LAR level, source and destination addresses are logical addresses of the initial sender @LS and of the final destination @LD (tree or neighbor).
	ietfreport.isoc.org /idref/draft-pansiot-logical-addressing (7312 words)

	RFC 1005 (rfc1005) - ARPANET AHIP-E Host Access Protocol (enhanced AHIP)
		These enhancements and modifications are partially motivated by a need to overcome the current address limitation of 256 PSNs per network and by a desire to allow hosts to take advantage of logical addressing with minimal change to their AHIP software.
		Basically, logical addressing allows hosts to refer to each other using a logical name (see section 3.1) which is independent of a host's physical location in the network.
		If a logical name is being used to specify the destination host, and the name maps to more than one authorized host port, then the PSN attempts to open a connection to another authorized and effective host port for that name.
	www.faqs.org /rfcs/rfc1005.html (7434 words)

	Memory Management: Chapter 8
		The concept of a logical address space that is bound to a separate physical address space is central to proper memory management.
		Logical and physical addresses are the same in compile-time and load-time address-binding schemes; logical (virtual) and physical addresses differ in execution-time address-binding scheme.
		Logical address space of a process can be noncontiguous; process is allocated physical memory wherever the latter is available.
	data.uta.edu /~ramesh/cse3320/chap8.html (1585 words)

	Virtual Memory Supplemental Information (Site not responding. Last check: 2007-10-01)
		The logical address is translated into a physical address by the memory management unit.
		The physical address may be different from the logical address, in which case the memory management unit translates the logical address into a physical address.
		A technique for providing a logical address space that is larger than the physical memory installed in the computer.
	developer.apple.com /technotes/tn/tn1094gloss.html (1999 words)

	Howstuffworks "How Routers Work"
		This physical address, which is also called the MAC address (for Media Access Control) has two parts, each 3 bytes long.
		Your mailing address, telephone number (or numbers) and home e-mail address all work to bring messages to you when you're in your house.
		You may be using the addressing schemes, or protocols, from several different types of networks simultaneously.
	computer.howstuffworks.com /router7.htm (411 words)

	Logical Partition Security in the IBM eServer pSeries 690
		Logical partitioning (LPAR) is a server design feature that provides more end-user flexibility by making it possible to run multiple, independent operating system images concurrently on a single server.
		Any attempt to access a real address outside the assigned range results in an addressing exception interrupt, which is handled by the operating system exception handler in the partition.
		A partition's memory, therefore, is composed of one contiguous real mode addressing region, plus some number of logical address regions, which may be assigned in any order from anywhere in memory.
	www-03.ibm.com /servers/eserver/pseries/hardware/whitepapers/lpar_security.html (1248 words)

	Logical Net: ISP Internet Services Provider - Internet Access, Web Hosting, Colocation, DSL
		Under the Logical Net Refer-A-Friend (RAF) program, referring a friend to Logical Net Members may earn $20 for each person they refer to become a New Logical Net Member.
		In order to qualify, a New Member must enter the Logical Net Referring Member's Logical Net email address (user@logical.net.net) in the field designated for recommendation during the registration process.
		Your friend should enter your Logical Net email address (an email address with @logical.net as the mail domain) in the box designated for recommendation during the registration process.
	www.logical.net /raf/raffaq.asp (825 words)

	RAID - Wikipedia, the free encyclopedia
		In this sense, concatenation is akin to the reverse of partitioning.
		The difference between JBOD and LVM/LSM is that the address remapping between the logical address of the concatenated device and the physical address of the disc is done by the RAID hardware instead of the OS kernel as it is LVM/LSM.
		This does not address the issue that the array is put under maximum strain reading every bit to rebuild the array precisely at the time when it is most vulnerable.
	en.wikipedia.org /wiki/RAID (7492 words)

	LOG from FOLDOC
		Symbolic logic uses a meta-language concerned with truth, which may or may not have a corresponding expression in the world of objects called existance.
		In symbolic logic, arguments and proofs are made in terms of symbols representing propositions and logical connectives.
		Logical shift is approriate when treating the word as a bit string or a sequence of bit fields, whereas arithmetic shift is appropriate when treating it as a binary number.
	www.instantweb.com /d/dictionary/foldoc.cgi?query=LOG (2962 words)

	VXI/VME Multi-Mainframe/Multi-Chassis Configuration: Logical Address Wizard - Support - National Instruments
		The Logical Address Wizard is a useful tool for determining the logical address assignments that you can use for the devices in a multi chassis VXI/VME system.
		It should be noted that the list of logical addresses generated by the LA Wizard are not the only set of logical addresses that will support the desired configuration layout.
		The range of logical addresses generated by the LA wizard simply represent the smallest range of logical addresses that will support the desired configuration.
	www.ni.com /support/vxi/multfram/la_wizard.htm (729 words)

	TN202 (Site not responding. Last check: 2007-10-01)
		In each case, the physical address is computed by shifting the segment register left 12 bits (multiplying by 1000h) and adding it to the l6-bit logical address.
		For a 256K or smaller device, address line inversion has no effect since the highest address line needed to address 256k is A17, but for a 512K device, this means that we have access to the whole 512K via one 256K quadrant of physical memory.
		Therefore physical addresses 80000h-BFFFFh (quadrant 2 of 0-3) map to offsets in the chip of 00000h-3FFFFh (the lower 256K of the chip) using lines A0-A17 with A18 not asserted.
	www.zworld.com /documentation/docs/refs/TN202/TN202.htm (1251 words)

	Howstuffworks "How Routers Work" (Site not responding. Last check: 2007-10-01)
		This logical address is connected to a physical address that you generally only see when you're buying or selling a piece of property.
		The chances are very good that you'll never see the MAC address for any of your equipment because the software that helps your computer communicate with a network takes care of matching the MAC address to a logical address.
		The IP address is the logical address assigned to your connection by your ISP or network administrator.
	www.howstuffworks.com /static/router3.htm (988 words)

	PAE36 and Linux Virtual Memory System (Site not responding. Last check: 2007-10-01)
		Addresses were computed using the value in a segment register as the base of an address, plus an offset value in the following way: physical addr.
		This enlarged logical space is achieved through using the segment registers, but in a different way as was used in the 8086/8088.
		Even though the physical address space is now 36 bits, the size of the logical address space, and the maximum segment size remain unchanged from the i386 at 64TB and 4GB respectively.
	www.prism.gatech.edu /~gte213x/LinuxMM/rpt.html (1282 words)

	Address Resolution Protocol
		ARP is the means by which an IP address is translated into a physical MAC address.
		By using ARP, a packet destined for a logical IP address may be delivered to a computer with a Network Interface Card (NIC) with a specific hardware address.
		ARP is used to build a host table listing the network protocol, the protocol's logical address, and the physical address (MAC) of that host.
	www.inetdaemon.com /tutorials/lan/arp.shtml (282 words)

	[No title]
		= 64, the address is considered logical, i.e., it refers to the host whose logical name is h concatenated with i.
		255, this address assignment restriction should not be considered permanent, but rather as an interim compromise until the hosts' X.25 implementations are revised to incorporate the new mapping between IP and DDN addresses.
		(Remember, the distinction between logical names and physical Khanna & Malis [Page 15] RFC 1005 May 1987 addresses is that the addresses correspond to physical locations on the network, while the names are strictly logical identifiers).
	www.ietf.org /rfc/rfc1005.txt (7499 words)

	Logical Net: ISP Internet Services Provider - Internet Access, Web Hosting, Colocation, DSL (Site not responding. Last check: 2007-10-01)
		Logical Net reserves the right to determine, in its sole discretion, whether a particular recommendation or New Member is fraudulent, and may withhold payment payments pending such determination.
		Logical Net may, in its sole discretion, discontinue or alter any aspect of the Logical Net Refer-a-Friend program at any time, without notice, and without liability.
		In the event that any of the provisions of the Refer-a-Friend program shall be held by a court of competent jurisdiction to be unenforceable, such provisions shall be limited or eliminated to the minimum extent necessary so that this program shall otherwise remain in full force and effect and enforceable.
	www.wpe.com /raf/rafrules.asp (709 words)

	NDC Logical Firewall
		Protecting hosts with the logical firewall involves giving them new and unroutable IP addresses (by replacing the first octet of their public IP address with 10).
		The logical firewall box is configured (with a virtual interface) to respond to the original/public address of the protected host and to do routing and Network Address Translation (NAT) to and from the protected host for that traffic which is allowed by the firewall rules.
		However, if one is willing to configure a DHCP server to issue only private addresses (or to properly determine, for each client, whether to issue a public or private address), the logical firewall can be used successfully.
	staff.washington.edu /corey/fw (3445 words)

	CS Lab: No Logical Maildrop Address (Site not responding. Last check: 2007-10-01)
		Logical addresses are normally associated with the use of network mail clients, which retrieve your mail from a mail server through the use of a protocol such as IMAP, POP3 or EXCHANGE.
		A logical maildrop address makes it simple to configure your mail client, and provides a level of indirection that makes it relatively easy to move your physical maildrop for load balancing, etc.
		To obtain a logical maildrop address so you can start using a network mail client, send a request to Postmaster.
	www.cs.washington.edu /lab/services/email/logical-address.html (178 words)

	CMPC, CPMC+ and CSNA Commands
		This value specifies the logical channel path and consists of two digits for the physical connection (either on the host or on the ESCON director), one digit for the channel logical address, and one digit for the control unit logical address.
		This is the unit address associated with the control unit number and path as specified in the host IOCP file.
		Specifies the IP address of the router to be used for this transmission group.
	www.cisco.com /univercd/cc/td/doc/product/software/ios121/121sup/121cmdsm/121csum2/121csbr2/bs2dcmpc.htm (1086 words)

	What is the difference between an IP address and a physical address?
		Every network device has two types of addresses, one called the logical address, in most cases this is the IP Address and the other one being the physical address, also known as MAC Address.
		This IP Address is used to allow all network aware programs, i.e., Internet Explorer, Netscape, Outlook, etc. to use this address when communicating with other hosts.
		So, to sum all that up, you should remember that a IP Address is a logical address which is configured via the operating system, while the MAC address is a hardware address, burnt into the network card's ROM during the manual factoring process.
	expertanswercenter.techtarget.com /eac/knowledgebaseAnswer/0,295199,sid63_gci974700,00.html (327 words)

	Extended address translation system for pointer updating in paged memory systems (US5420993)
		A system for updating logical address data in pointers used by a processor in a computer system using paged memory.
		If the required data is not available in the dual cache memory, then other circuitry is operative to translate logical addresses into physical addresses permitting rapid access to main memory in order to supply the dual cache memory and logical address RAM with the required data.
		(d1) means for accessing in one clock cycle, the ASD Number logical address and displacement value of said newly targeted data for insertion into said original pointer in place of the original ASD number and displacement value.
	www.delphion.com /details?pn10=US05420993 (473 words)

	[No title]
		Logical Address: or virtual address - generated by CPU Physical Address: address seen by memory unit.
		Logical and physical addresses are the same in compile time and load-time binding schemes Logical and physical addresses differ in execution-time address-binding scheme.¡6gªgªól”¨Memory Management Unit (MMU) ¨Hardware device that maps virtual to physical address.
		The user program deals with logical addresses; it never sees the real physical address.óm•¨Swapping¨A process can be swapped temporarily out of memory to a backing store and then brought back into memory for continued execution.
	www.ics.uci.edu /~ics143/lectures/oslecture10-13.ppt (2088 words)

	Certification Center.net - Home
		This protocol introduced logical addressing and is able to assign IP address to computers.
		IP addresses are classified as A-B-C-D or E. IP address most commonly used are A, B, and C. IP addresses are broken into 3 parts.
		Network address (which is your base address of your network), Subnet Address (which can be a division of your network), and Host Address (which is a single computer).
	www.certificationcenter.net /phpweb/tcphistory.php (1532 words)

	CS170 Lecture notes -- Thanks for the Memories -- Chapter 9
		This lecture will attempt to cover the various concepts that are important to the memory management functions that most operating systems must perform.
		checks the logical address to determine if it refers to a routine or variable that must be dynamically linked from the information kept in a "link table"
		used to allow a program with a physical address space that is smaller than than the logical address region the program occupies
	www.cs.ucsb.edu /~rich/class/cs170/notes/MemoryManagement (987 words)

	Cosmological Argument
		The relationship between cause and effect is treated as logical, not temporal.
		That is, if God necessarily exists in the sense that if he exists, he exists in all possible worlds, it remains logically possible that God does not exist in any (and all) possible world.
		We addressed objections to the Causal Principle from a philosophical perspective earlier in 3.4.
	plato.stanford.edu /entries/cosmological-argument (9555 words)

	Novell Documentation: NetWare 6.5 - Protected Address Spaces
		This protected address space is a portion of the logical address space that has carefully controlled interaction with the server operating system.
		A key benefit of protected address spaces is that you can use them to take advantage of virtual memory or to run untried or troublesome applications.
		When there is more than one protected address space, the memory management subsystem loads one set of page translations for a specified time and then replaces it with another.
	www.novell.com /documentation/nw65/smem_enu/data/hm7eiu26.html (429 words)

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