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Topic: Network protocol

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  Communications protocol - Wikipedia, the free encyclopedia
An example of a simple communications protocol adapted to voice communication is the case of a radio dispatcher talking to mobile stations.
Protocol layering accomplishes these objectives by dividing the protocol design into a number of smaller parts, each of which performs closely related sub-tasks, and interacts with other layers of the protocol only in a small number of well-defined ways.
Protocol layering allows the parts of a protocol to be designed and tested without a combinatorial explosion of cases, keeping each design relatively simple.
en.wikipedia.org /wiki/Network_protocol   (1022 words)

 RFC 1067 (rfc1067) - Simple Network Management Protocol
Network elements are devices such as hosts, gateways, terminal servers, and the like, which have management agents responsible for performing the network management functions requested by the network management stations.
A second goal of the protocol is that the functional paradigm for monitoring and control be sufficiently extensible to accommodate additional, possibly unanticipated aspects of network operation and management.
Protocol Specification The network management protocol is an application protocol by which the variables of an agent's MIB may be inspected or altered.
www.faqs.org /rfcs/rfc1067.html   (5074 words)

 Network Protocols: Definition and Overview
The IP, the Internet Protocol, is responsible for exchanging information between routers so that the routers can select the proper path for network traffic, while TCP is responsible to ensure the data packets are transmitted across the network reliably and error free.
WAN protocol suite is for the lowest three layers and defines communication over various wide-area media such as fiber optic and cable.
Protocols could be grouped into suites (or families, or stacks) by their technical functions, or origin of the protocol introduction, or both.
www.javvin.com /protocols.html   (789 words)

 Network Analysis Protocol Analyzer - FAQs
While protocol analyzers can be used by network developers to view the exact contents of a network conversation, a modern protocol analyzer with a graphical user interface provides many other types of information beyond the bits and bytes of the actual protocols.
Protocol Statistics displays the percentage of your LAN bandwidth that a particular protocol is using.
Using a protocol analyzer in a switched environment is common, and can provide both global port balancing information (using station statistics) and specific conversation troubleshooting information (using packet capture and decode).
www.networkinstruments.com /products/faq.html   (1327 words)

Protocol -A formal description of a set of rules and conventions that govern how devices on a network exchange information.
Repeater - A device used in a network to strengthen a signal as it is passed along the network cable.
In networks, it is generally used to allow for the connection between two different types of cable connectors, such as AUI and RJ-45.
fcit.usf.edu /network/glossary.htm   (1986 words)

 network monitor, protocol analyzer, and packet sniffer
If your network is crawling to a standstill, and you suspect there might be a problem with the network traffic, Network Probe will quickly help you identify what is causing the problem, show you who is generating any troublesome traffic, and where the traffic is being transmitted.
Network Probe gives you full graphical representation and detailed statistics of the traffic load on your network and the type of data travelling across it.
All network traffic information collected by the probe can be searched, sorted, and filtered by protocols, hosts, conversations, network interfaces, traffic amount, and the date and time any of these entries were first seen.
www.objectplanet.com /Probe   (486 words)

 RFC 1305 (rfc1305) - Network Time Protocol (Version 3) Specification, Impl   (Site not responding. Last check: 2007-10-06)
Network Working Group David L. Mills Request for Comments: 1305 University of Delaware Obsoletes RFC-1119, RFC-1059, RFC-958 March 1992 Network Time Protocol (Version 3) Specification, Implementation and Analysis Note: This document consists of an approximate rendering in ASCII of the PostScript document of the same name.
The protocol includes provisions to specify the characteristics and estimate the error of the local clock and the time server to which it may be synchronized.
Network Configurations The synchronization subnet is a connected network of primary and secondary time servers, clients and interconnecting transmission paths.
www.faqs.org /rfcs/rfc1305.html   (17209 words)

 Network Time Protocol - a Whatis.com definition - see also: NTP   (Site not responding. Last check: 2007-10-06)
Network Time Protocol (NTP) is a protocol that is used to synchronize computer clock times in a network of computers.
In common with similar protocols, NTP uses Coordinated Universal Time (UTC) to synchronize computer clock times to a millisecond, and sometimes to a fraction of a millisecond.
Accurate time across a network is important for many reasons; even small fractions of a second can cause problems.
searchnetworking.techtarget.com /sDefinition/0,,sid7_gci283988,00.html   (535 words)

 Simple Network Management Protocol - Wikipedia, the free encyclopedia
The protocol can support monitoring of network-attached devices for any conditions that warrant administrative attention.
The SNMP protocol operates at the application layer (layer 7) of the OSI model.
Simple Network Management Protocol version 2 (RFC 1441-RFC 1452), also known as SNMP v2 or SNMP v2p, revises version 1 and includes improvements in the areas of performance, security, confidentiality, and manager-to-manager communications.
en.wikipedia.org /wiki/Simple_network_management_protocol   (1462 words)

 Network Monitor, Protocol Analyzer, Network Probe   (Site not responding. Last check: 2007-10-06)
Distinct Network Monitor is a packet capture and network protocol analyzer software that translates complex protocol negotiation into natural language, pinpointing where errors occurred.
Network Monitor was developed for network professionals who need to quickly detect network errors rather than wading through pages of incomprehensible network traffic.
The Distinct Network Monitor Statistics gathering and analysis module allows you to get a very good picture of the activity that is going on for any given network segment monitored.
www.network-monitor.com   (1323 words)

 Simple Network Management Protocol
By specifying the protocol to be used between the network management application and management agent, SNMP allows products (software and managed devices) from different vendors (and their associated management agents) to be managed by the same SNMP network management application.
The loss of data may be a limitation to a network manager, depending on the criticality of the information being gathered and the frequency at which the polling is being performed.
The IETF is a large open community of network designers, operators, vendors, and researchers whose purpose is to coordinate the operation, management and evolution of the Internet, and to resolve short- and mid-range protocol and architectural issues.
www.sei.cmu.edu /str/descriptions/snmp_body.html   (2374 words)

 Controller Area Network (CAN) - Protocol
Beside the CAN protocol itself the conformance test for the CAN protocol is defined in the ISO 16845, which guarantees the interchangeability of the CAN chips.
Every message has a message identifier, which is unique within the whole network since it defines content and also the priority of the message.
It is easy to add stations to an existing CAN network without making any hardware or software modifications to the present stations as long as the new stations are purely receivers.
www.can-cia.org /can/protocol   (1392 words)

 Network Protocol Stack & TCP hacking | Linux Gazette   (Site not responding. Last check: 2007-10-06)
The network protocol stack, which forms the carrier and pipeline of data from one host to another is designed in such a way that we can interact with different layers at desired level.
Network devices form the bottom layer of the protocol stack.
The port along with the IP address of the network interface is used to uniquely identify a socket.
www.linuxgazette.com /node/view/8781   (2047 words)

 IP   (Site not responding. Last check: 2007-10-06)
The IP (Internet Protocol) is a protocol which uses datagrams to communicate over a packet-switched network.
The IP protocol operates at the network layer protocol of the OSI reference model and is a part of a suite of protocols originally developed by the US Department of Defense (DoD).
In a LAN environment, the protocol is normally carried by Ethernet, but for long distance links, a data link protocol such as HDLC is usually used.
www.erg.abdn.ac.uk /users/gorry/course/inet-pages/ip.html   (341 words)

 WKMN - Network Protocol Tutorial
It is important to know what parts of the protocols reside at the different layers of the model.
Your job is to click and drag various components of these protocol suites into their appropriate OSI model layers until you've completely built the stacks.
Network Monitoring and Analysis: A Protocol Approach to Troubleshooting by Ed Wilson, James Naramore
www.wkmn.com /newsite/protocol.html   (613 words)

 Chapter 2: Protocol
A protocol is a set of rules that governs the communications between computers on a network.
Fiber Distributed Data Interface (FDDI) is a network protocol that is used primarily to interconnect two or more local area networks, often over large distances.
Asynchronous Transfer Mode (ATM) is a network protocol that transmits data at a speed of 155 Mbps and higher.
fcit.coedu.usf.edu /network/chap2/chap2.htm   (844 words)

 SNMP - Simple Network Managment Protocol
Since it was developed in 1988, the Simple Network Managment Protocol has become the de facto standard for internetwork managment.
The Manager is the console through which the network administrator performs network managment functions.
The primary protocols that SNMP implements are the User Datagram Protocol (UDP) and the Internet Protocol (IP).SNMP also requires Data Link Layer protocols such as Ethernet or TokenRing to implement the communication channel from the managment to the managed agent.
www2.rad.com /networks/1995/snmp/snmp.htm   (1893 words)

 SNMP, Simple Network Management Protocol
Implicit in the SNMP architectural model is a collection of network management stations and network elements.
Management information communicated by operation of the SNMP is represented according to the subset of the ASN.1 language that is specified for the definition of non-aggregate types in the SMI.
The command responder application will perform the appropriate protocol operation, using access control, and will generate a response message to be sent to the request's originator.
www.networksorcery.com /enp/protocol/snmp.htm   (4115 words)

 Network sniffer for Windows, protocol analyzer, ip sniffer, LAN sniffer
SoftPerfect Network Protocol Analyzer is a useful tool for network administrators, security specialists, network application developers and anyone who needs a comprehensive picture of the traffic passing through their network connection or segment of a local area network.
SoftPerfect Network Protocol Analyzer presents the results of its network analysis in a convenient and easily understandable format.
It also requires a network connection which could be a wireless connection or a modem that conforms to the NDIS standard.
www.softperfect.com /products/networksniffer   (438 words)

 The Network Time Protocol (NTP) Distribution
The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem.
Discussion on protocol conformance issues and interoperability with previous NTP versions can be found on the Protocol Conformance Statement page.
While public key cryptography is optional but highly recommended for all NTP operations, it is required for the NTPv4 Autokey protocol described on the Autonomous Authentication page and is an integral component of the generic automatic configuration scheme described on the Autonomous Configuration page.
www.eecis.udel.edu /~ntp/ntp_spool/html   (1451 words)

 [No title]
The development at ISI of the Network Voice Protocol described herein is an important part of the total effort.
The current HOST-to-HOST protocol of the ARPANET, which was designed (and optimized) for data transfer, was found unsuitable for real-time network voice communication.
For example, the PITCH value (at the transmitter) of 4131 belongs to the interval "(4024,4131]", hence it is coded as j=6 which is mapped by the receiver to the value 21.
www.ietf.org /rfc/rfc741.txt   (3735 words)

 time reference for your network NTP - The Network Time Protocol
NTP has been initiated in the 1980's by Dave L. Mills who was trying to achieve a high accuracy time synchronization for computers across the network.
The devices also have a network interface and power supply included, are assembled in a standalone case and ready to operate.
In large networks it is a good practice to install one ore more stratum 1 time servers which make a reference time available to several server computers in each department.
www.ntp-zeit.de /index_en.htm   (880 words)

 GeodSoft How-To: NTP Time Synchronization: Contents
A tutorial on how-to install free Network Time Protocol (NTP) servers and clients on UNIX (OpenBSD and Linux) and Windows to synchronize the time on all your computers to within less than a second of the official Coordinated Universal Time (UTC).
The open source Network Time Protocol server, ntpd, is complex, and the extensive and highly technical documentation at the official University of Delaware NTP site, is not oriented to the practical issues of getting NTP servers to work with a minumum of time and effort.
Installing Network Time Protocol software is trivial compared to figuring out what you're going to connect it to; these pages explain the relationships between NTP servers and how to select public servers to act as your time sources.
geodsoft.com /howto/timesync   (583 words)

 Simple Network Management Protocol (SNMP)
The Simple Network Management Protocol (SNMP) is an application layer protocol that facilitates the exchange of management information between network devices.
A managed device is a network node that contains an SNMP agent and that resides on a managed network.
Network addresses represent an address from a particular protocol family.
www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/snmp.htm   (3016 words)

 Javvin | Network Protocols Guide, Network Monitoring & Analysis Tools
Network security vulnerabilities, technologies, protocols and solutions, all on one nice poster.
Comprehensive Protocol Map focus on TCP/IP protocol suite and key layer 1 and 2 LAN, WAN an MAN protocols.
An easy to use and powerful protocol analyzer for network and user monitoring and troubleshooting.
www.javvin.com   (158 words)

 ntp.org: Home of the Network Time Protocol
The NTP Project conducts Research and Development in NTP and produces the Official Reference Implementation of NTP along with the Implementation Documentation.
Background information about NTP, along with briefings and a bibliography, are available at the Network Time Synchronization Project page.
NTP is a protocol designed to synchronize the clocks of computers over a network.
www.ntp.org   (240 words)

 CLNP, Connectionless Network Protocol, ISO 8473
CLNP provides essentially the same maximum datagram size, and for those circumstances where datagrams may need to traverse a network whose maximum packet size is smaller than the size of the datagram, CLNP provides mechanisms for fragmentation (data unit identification, fragment/total length and offset).
Like IP, a checksum computed on the CLNP header provides a verification that the information used in processing the CLNP datagram has been transmitted correctly, and a lifetime control mechanism ("Time to Live") imposes a limit on the amount of time a datagram is allowed to remain in the internet system.
As is the case in IP, a set of options provides control functions needed or useful in some situations but unnecessary for the most common communications.
www.networksorcery.com /enp/protocol/clnp.htm   (272 words)

 SNMP Research: Protocol (SNMP)
SNMP (Simple Network Management Protocol) is the standard operations and maintenance protocol for the Internet.
SNMP Research's initiative for product evolution, protocol enhancement, and to align with future industry standards.
AES and 3-DES are not available outside the United States due to export restrictions.
www.snmp.com /protocol   (401 words)

 Simple Network Management Protocol - a Whatis.com definition - see also: SNMP   (Site not responding. Last check: 2007-10-06)
and the monitoring of network devices and their functions.
It is not necessarily limited to TCP/IP networks.
SNMP is described formally in the Internet Engineering Task Force (IETF) Request for Comment (RFC) 1157 and in a number of other related RFCs.
searchnetworking.techtarget.com /sDefinition/0,,sid7_gci214221,00.html   (172 words)

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