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Topic: Subnetwork


In the News (Tue 2 Dec 08)

  
  Subnetwork - Wikipedia, the free encyclopedia
In the Internet Protocol (IP), a subnetwork is a division of a classful network.
They are typically used to determine whether to send a packet to the MAC address of the default gateway (for packets with destinations outside the subnet) or of the actual machine (for inside the subnet), as determined by ARP.
For example, giving the class A network 10.0.0.0 a subnet mask of 255.255.0.0 would break it down into 256 sub-networks (10.0.0.0 to 10.0.255.0), and indicates that the first octet of the IP address shows the network address, the second one shows the subnet number and the last two show the host part.
en.wikipedia.org /wiki/Subnetwork   (1032 words)

  
 RFC 3819 (rfc3819) - Advice for Internet Subnetwork Designers AUTHORS: P
Subnetworks need not support maximum-sized (64KB) IP packets, as IP provides a scheme that breaks packets that are too large for a given subnetwork into fragments that travel as independent IP packets and are reassembled at the destination.
Data presented to the subnetwork layer may already be in a compressed format (e.g., a JPEG file), compressed at the application layer (e.g., the optional "gzip", "compress", and "deflate" compression in HTTP/1.1 [RFC2616]), or compressed at the IP layer (the IP Payload Compression Protocol [RFC3173] supports DEFLATE [RFC2394] and LZS [RFC2395]).
The subnetwork may wish to use IP routing internally for wide area routing and restrict subnetwork-specific routing to constrained geographic areas where the effects of suboptimal routing are minimized.
www.faqs.org /rfcs/rfc3819.html   (18051 words)

  
 Transition Network Grammar
The two arcs constitute a path through the NP subnetwork because the starting node of the DET arc is the initial node of the subnetwork, and the ending node of the N arc is the final, accepting node of the subnetwork.
Consequently, the NP subnetwork is entered, and the arcs comprising one of its paths are traversed before a return is made to the S subnetwork.
The NP subnetwork path might consist of the DET and N arcs, meaning that first a word in the determiner category, and then a word in the noun category must be identified before any further arcs in the S subnetwork can be traversed.
web.uvic.ca /~ling48x/ling484/notes/tng.html   (1604 words)

  
 [No title]
Alternatively, for subnetworks that do not reorder the fragments of an SNDU, only the last SNDU of the packet could be marked, as this would implicitly Karn, et al.
In one version of RED, an exponentially-weighted moving average of the queue depth is maintained: When this average queue depth is between a maximum threshold max_th and a minimum threshold min_th, the probability of packets that are dropped is proportional to the amount by which the average queue depth exceeds min_th.
IP is ignorant of the topology of the subnetwork layer.
www.ietf.org /rfc/rfc3819.txt   (18869 words)

  
 RFC 3819 - Advice for Internet Subnetwork Designers
Best Current Practice [Page 2] RFC 3819 Advice for Internet Subnetwork Designers July 2004 This document defines a subnetwork as a layer 2 network, which is a network that does not rely upon the services of IP routers to forward packets between parts of the subnetwork.
Best Current Practice [Page 3] RFC 3819 Advice for Internet Subnetwork Designers July 2004 A major consideration in the efficient design of any layered communication network is the appropriate layer(s) in which to implement a given function.
Best Current Practice [Page 15] RFC 3819 Advice for Internet Subnetwork Designers July 2004 retransmission timeout on prior measurements of total end-to-end latency, including that of the link in question, this sudden increase in latency may trigger an unnecessary retransmission by TCP of a packet that the link layer is still retransmitting.
www.packetizer.com /rfc/rfc3819   (18177 words)

  
 Roxen Community: RFC 3819 Advice for Internet Subnetwork Designers (Best Current Practice)   (Site not responding. Last check: 2007-11-02)
This document provides advice to the designers of digital communication equipment, link-layer protocols, and packet-switched local networks (collectively referred to as subnetworks), who wish to support the Internet protocols but may be unfamiliar with the Internet architecture and the implications of their design choices on the performance and efficiency of the Internet.
Subnetwork designers should be aware of the tradeoffs between fairness and efficiency inherent in many transmission scheduling algorithms.
Subnetworks connecting more than two systems must provide their own internal Layer-2 forwarding mechanisms, either implicitly (e.g., broadcast) or explicitly (e.g., switched).
community.roxen.com /developers/idocs/rfc/rfc3819.html   (16555 words)

  
 RFC 1070 (rfc1070) - Use of the Internet as a subnetwork for experimentati
The method suggested is to treat the Internet as a subnetwork, hereinafter called the "IP subnet." We do this by encapsulating OSI connectionless network layer protocol (ISO 8473) packets in IP datagrams, where IP refers to the Internet network layer protocol, RFC 791.
SNPA-address SubNetwork Point of Attachment address, or an address at which the subnetwork service is available to the network entity.
While one could obviate this issue by treating the IP subnet as a general topology subnetwork or as a set of point- to-point links, it is also desirable to treat the IP subnet as a broadcast subnetwork for the purpose of testing those parts of an implementation that run over broadcast subnets.
www.faqs.org /rfcs/rfc1070.html   (3850 words)

  
 Linux.com - IP Sub-Networking Mini-Howto: How to subnetwork a IP network number
Decide how big/small each subnetwork needs to be in terms of the number of devices that will connect to it - ie how many usable IP numbers are required for each individual segment.
When you subnetwork, each subnetwork requires its own, unique IP network number and broadcast address - and these have to be valid addresses from within the range provided by the IP network that you are sub-networking.
This makes it extremely difficult for us humans to decide to which subnetwork an IP number belongs as we are not too good at thinking in binary (computers on the other hand are and will use whatever scheme you tell them with equal equanimity).
www.linux.com /howtos/IP-Subnetworking-6.shtml   (996 words)

  
 Definition: subnetwork   (Site not responding. Last check: 2007-11-02)
Specifically, a collection of open system interconnection (OSI) end systems and intermediate systems under the control of a single administrative domain and using a single network access protocol.
Note: Examples of subnetworks are private X.25 networks and collections of bridged local area networks.
This HTML version of Telecom Glossary 2K was last generated on Wed May 8 15:36:48 MDT 2002.
www.its.bldrdoc.gov /projects/devglossary/_subnetwork.html   (85 words)

  
 SNAP: SubNetwork Access Protocol Overview (RFC 1042)
The SubNetwork Access Protocol (SNAP) is an a standard for the transmission of IP datagrams over IEEE 802 networks.
In other words, IP datagrams could be sent on IEEE 802 networks encapsulated within the 802.2 LLC and SNAP data link layers and the 802.3, 802.4 or 802.5 physical network layers.
With SNAP, the transmission of IP datagrams does not depend on the transmission rate of the under layer LAN technologies (various types of Ethernet, or Token Ring), which may have different very different transmission rate from 1 to 20 Mbps.
www.javvin.com /protocolSNAP.html   (345 words)

  
 subnetwork - a Whatis.com definition   (Site not responding. Last check: 2007-11-02)
A subnetwork is a separately identifiable part of a larger network that typically represents a certain limited number of host computers, the hosts in a building or geographic area, or the hosts on an individual local area network.
Companies often create subnetworks (sometimes called subnets) when setting up connection to the Internet as a way to manage the limited number of Internet Protocol addresses (IP addresses) that are available with Internet Protocol version 4.
Find white papers, products and vendors related to subnetwork.
whatis.techtarget.com /gDefinition/0,294236,sid7_gci283999,00.html   (130 words)

  
 subnetwork hierarchies of biochemical pathways
The files below are hierarchy trees for all organisms of the WIT database (as described in the article Subnetwork hierarchies of biochemical pathways).
Looking at the trees from right to left, you can see in what order the subnetworks breaks.
By placing a vertical cut you can see what networks are connected at a specific time.
www.tp.umu.se /forskning/networks/meta   (91 words)

  
 ★ Subnetwork Reseller : ResponsiveWeb > Free Consultations: Hosting, Design, Ecommerce
Distribute a toll free number to your clients who require support, and we will answer that phone with prerecorded message customized to your company.
Full control over all your servers, root access across your entire subnetwork.
You can purchase IP Addresses in batches of 128 for $30 a month, and have full web log processing for $30 a month.
www.responsiveweb.com /com/en/reseller/subnetworks.php   (431 words)

  
 RFC 1142
There are two generic types of subnetworks supported.
Where the subnetwork to which this SNPA is con
On broadcast subnetworks, this class of failure shall be de
library.n0i.net /rfc/html/rfc1142.html   (12260 words)

  
 Linux.com - IP Sub-Networking Mini-Howto: Why subnetwork?
Network traffic is sufficiently high to be causing significant slow downs.
By splitting the network up using subnetworks, traffic that is local to a network segment can be kept local - reducing overall traffic and speeding up network connectivity without requiring more actual network bandwidth;
Security requirements may well dictate that different classes of users do not share the same network - as traffic on a network can always be intercepted by a knowledgeable user.
www.linux.com /howtos/IP-Subnetworking-5.shtml   (406 words)

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