337:
Network monitoring services usually have several servers around the globe - for example in
America, Europe, Asia, Australia and other locations. By having multiple servers in different geographic locations, a monitoring service can determine if a Web server is available across different networks
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External monitoring is more reliable, as it keeps on working when the server completely goes down. Good server monitoring tools also have performance benchmarking, alerting capabilities and the ability to link certain thresholds with automated server jobs, such as provisioning more memory or
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Route analytics is another important area of network measurement. It includes the methods, systems, algorithms and tools to monitor the routing posture of networks. Incorrect routing or routing issues cause undesirable performance degradation or downtime.
358:. Analysis of the HTTP codes is the fastest way to determine the current status of the monitored web server. Third-party application performance monitoring tools provide additional web server monitoring, alerting and reporting capabilities.
244:, Media Streaming and a range of other ports with a variety of check intervals ranging from every four hours to every one minute. Typically, most network monitoring services test your server anywhere between once per hour to once per minute.
163:
is an important area of network measurement, which deals with monitoring the health of various links in a network using end-to-end probes sent by agents located at vantage points in the network/
72:
monitors a network threats from the outside, a network monitoring system monitors the network for problems caused by overloaded or crashed servers, network connections or other devices.
289:, i.e. some web server monitoring companies check the status of the services with a certain frequency. Server monitoring can encompass a check of system metrics, such as
496:
366:
As the information brought by web server monitoring services is in most cases urgent and may be of crucial importance, various notification methods may be used:
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When monitoring a web server for potential problems, an external web monitoring service checks several parameters. First of all, it monitors for a proper
30:
This article is about monitoring for technical failures. For monitoring in the sense of surveillance, but the relying mostly on the same technology, see
133:, or the document or message cannot be retrieved, usually produce an action from the monitoring system. These actions vary; An alarm may be sent (via
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Monitoring an internet server means that the server owner always knows if one or all of their services go down. Server monitoring may be
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141:, automatic failover systems may be activated to remove the troubled server from duty until it can be repaired, etc.
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devices is having an adverse effect on most network monitoring tools, especially when it comes to measuring accurate
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114:, although both consistency and reliability metrics are starting to gain popularity. The widespread addition of
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worldwide. The more the locations used, the more complete the picture of network availability.
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or other alarms) in case of outages or other trouble. Network monitoring is part of
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software checks its status and notifies the owner if some services go down, and
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Status request failures, such as when a connection cannot be established, it
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List of
Network Monitoring and Management Tools at Stanford University
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For monitoring network performance, most tools use protocols like
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497:"The impact of WAN Optimization on NetFlow/IPFIX measurements"
462:, Cham: Springer International Publishing, pp. 863–867,
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Advances on P2P, Parallel, Grid, Cloud and
Internet Computing
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456:"NetFlow: Network Monitoring and Intelligence Gathering"
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specifications RFC 2616, any web server returns several
309:, such as checking the processes of programs such as
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for slow or failing components and that notifies the
40:is the use of a system that constantly monitors a
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27:Use of a system that monitors a computer network
79:, monitoring software may periodically send an
87:servers, a test message might be sent through
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179:
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75:For example, to determine the status of a
454:Ratan, Vivek; Li, Kin Fun (2016-10-22),
408:Comparison of network monitoring systems
144:Monitoring the performance of a network
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420:, a European network monitoring system
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184:Site monitoring services can check
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424:Network Monitoring Interface Card
32:Computer and network surveillance
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137:, email, etc.) to the resident
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102:Commonly measured metrics are
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1:
342:Web server monitoring process
83:request to fetch a page. For
468:10.1007/978-3-319-49109-7_83
7:
403:Business service management
398:Network traffic measurement
385:
150:network traffic measurement
10:
565:
270:
267:Internet server monitoring
180:Various types of protocols
70:intrusion detection system
63:
29:
18:Network monitoring system
333:Servers around the globe
434:Service-level agreement
307:application monitoring
305:. It can also include
329:performing a backup.
124:round-trip delay time
46:network administrator
441:Notes and references
299:network performance
122:because they limit
549:Network management
525:Network Management
311:Apache HTTP server
273:Website monitoring
161:Network tomography
156:Network tomography
58:network management
38:Network monitoring
477:978-3-319-49108-0
413:High availability
148:is also known as
91:and retrieved by
16:(Redirected from
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499:. Archived from
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348:HTTP return code
120:end-to-end delay
116:WAN optimization
42:computer network
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382:, pagers, etc.
370:, landline and
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257:Packet Sniffing
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173:
171:Route analytics
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35:
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519:External links
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429:System monitor
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503:on 2011-12-24
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104:response time
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505:. Retrieved
501:the original
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481:, retrieved
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362:Notification
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327:
325:and others.
295:memory usage
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278:
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183:
174:
159:
143:
128:
126:visibility.
108:availability
101:
74:
67:
37:
36:
393:Network tap
372:cell phones
507:2007-07-19
483:2020-11-01
356:HTTP codes
303:disk space
283:web server
271:See also:
77:web server
291:CPU usage
131:times-out
68:While an
543:Category
386:See also
323:Postgres
287:external
279:internal
165:Internet
139:sysadmin
418:LOBSTER
281:, i.e.
253:NetFlow
188:pages,
64:Details
529:Curlie
474:
368:e-mail
222:TELNET
146:uplink
112:uptime
350:. By
319:Nginx
315:MySQL
259:, or
190:HTTPS
85:email
50:email
48:(via
472:ISBN
352:HTTP
301:and
249:SNMP
234:ICMP
210:IMAP
206:POP3
202:SMTP
194:SNMP
186:HTTP
110:and
97:POP3
93:IMAP
89:SMTP
81:HTTP
527:at
464:doi
380:fax
376:SMS
261:WMI
242:UDP
238:SIP
230:TCP
226:SSL
218:SSH
214:DNS
198:FTP
135:SMS
95:or
54:SMS
545::
470:,
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263:.
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167:.
152:.
106:,
99:.
60:.
52:,
510:.
466::
34:.
20:)
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