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Network Design and Management
Network Design and Management

... costs, reliability through redundancy, and so on. ...
16 Kyung Hee University Error Reporting Message (cont`d)
16 Kyung Hee University Error Reporting Message (cont`d)

... connectionless Internet Protocol.  ICMP messages are encapsulated in IP datagrams. There are two categories of ICMP messages: error-reporting and query messages. The error-reporting messages report problems that a router or a host may encounter when it processes an IP packet. The query messages, wh ...
Acceptable Use Policy
Acceptable Use Policy

... Client's use of the Services will constitute the Client's acceptance of any such amendments. 1) Responsibilities. Clients are responsible for complying with this AUP and for violations attributable to their customers and users, whether authorized or not by the Client. Clients must take all reasonabl ...
VPN Routers - D-Link
VPN Routers - D-Link

... Available in Firmware 1.09 and Later. 2 DSR-150N/250N/500N/1000N only. 3 DSR-500/500N only. 4 Printer support list can be referred to at http://www.openprinting.org/printers. 5 Actual performance may vary depending on network conditions and activated services. 6 Firewall throughput is measured using ...
performance-analysis
performance-analysis

... Example: iptraf -i eth1 ...
Step-by-Step Guide
Step-by-Step Guide

... The web interface of the company headquarter’s firewall should have a fixed IP address to make it possible for the filial’s server and VPN clients to connect to it (see requirements in chapter 1). Suppose that the ISP has assigned IP address 85.17.210.230. It is also recommended to assign a DNS name ...
Carrier Ethernet – the Technology of Choice for Access
Carrier Ethernet – the Technology of Choice for Access

... services evolve. T1/E1 TDM circuits currently used within RAN backhaul networks are ideal for carrying the high- value voice services but are clearly not optimized in terms of cost or capacity for transport of high bandwidth data services. Therefore the mobile operators face a significant challenge; ...
6 Multi-layer Recovery Strategy in Resilient Packet
6 Multi-layer Recovery Strategy in Resilient Packet

... point-to-point circuit-switched services such as voice services. On the other hand, for metropolitan environments, Ethernet technology may offer a simpler and cost-effective solution for the transport of the data traffic. However, because Ethernet is optimized for point-to-point or meshed topologies ...
Automated and Scalable QoS Control for Network Convergence
Automated and Scalable QoS Control for Network Convergence

... Network Quality of Service (QoS) has been a difficult target to achieve for quite a while even though newer applications such as video conferencing, VoIP etc. demand performance guarantees. Despite a large volume of work, QoS has not been widely deployed in today’s networks. A primary reason for thi ...
Spectrum-Efficient and Scalable Elastic Optical Path Network
Spectrum-Efficient and Scalable Elastic Optical Path Network

... (WXCs) without undergoing optical-electricaloptical (OEO) regeneration has made the optically routed transparent mesh networks feasible. The optically routed transparent mesh networking has obvious advantages, such as the elimination of costly, power- and space-consuming OEO regenerators and automat ...
3. Centralized versus Distributed Mobility
3. Centralized versus Distributed Mobility

... management, subscription databases, and network access authentication to be similarly distributed. A distributed mobility management scheme for a flattening mobile network consisting of access nodes is proposed in [DIST-DYNAMIC-MOB]. Its benefits over centralized mobility management have been shown ...
Guidelines for Interdomain Traffic Engineering
Guidelines for Interdomain Traffic Engineering

... Interdomain traffic engineering is significantly more complicated than intradomain traffic engineering. While IGPs select paths based on link metrics, such as static weights or dynamic load information, BGP advertisements do not explicitly convey any information about the resources available on a pa ...
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M3AAWG Anti-Abuse Best Common Practices for Hosting and Cloud
M3AAWG Anti-Abuse Best Common Practices for Hosting and Cloud

... Train customer-facing staff in security awareness. Customer-facing teams such as support, sales and marketing do not face the majority of daily challenges that are the norm for the abuse or security teams. Training provides these teams with knowledge of when to tell a customer or prospect that thei ...
Link Layer
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...  seldom used on low bit-error link (fiber, some twisted pair)  wireless links: high error rates • Q: why both link-level and end-end reliability? 5: DataLink Layer ...
Network Performance Analysis
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S-72.423 Telecommunication Systems
S-72.423 Telecommunication Systems

... While the underlying protocols and technologies are different, both MPLS and ATM provide a connection-oriented service for transporting data across computer networks. In both technologies connections are signaled between endpoints, connection state is maintained at each node in the path and encapsul ...
Riga Technical University
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... applications. Although most of today’s networks connected cars still rely on telematics systems with lowbandwidth connectivity (e.g., satellite link), which do not correspond to needs of emerging new applications. It is expected that such situation will change quickly. During this research several c ...
Passive Online Rogue Access Point Detection Using Sequential
Passive Online Rogue Access Point Detection Using Sequential

... Figure 2: Settings for the analysis: (a) Ethernet, (b) WLAN (802.11b or 802.11g). The dashed rectangle between the sender and the router represents the monitoring point. The pair of ACKs, A1 and A3 , forms an ACK-pair. Mbps bandwidth; and the receiver is connected to the access point using 11 Mbps 8 ...
Dynamic addressing
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... • TCP/IP transport layer using UDP does not always guarantee reliable delivery of packets as the transport layer in the OSI model does. Dr. L. Christofi ...
TKN
TKN

... mobile phones with a cellular and a WLAN interface, will emerge, thus nomadic users as well as users with pedestrian mobility will reside inside a WLAN network. Since mobile users may arrive at or leave a cell during an on-going application session like a VoIP call, a large challenge is to enable se ...
Presence
Presence

...  Collects presence through on-demand querying, periodic polling, and triggering  Supports multiple protocols for interfacing to external data sources  Propagates Presence Data out to All Authorized Subscribers and Applications ...
Data Center Monitoring Using Nagios Matti Taina
Data Center Monitoring Using Nagios Matti Taina

... for alerting the technicians of a problem, nothing will tell whether that single machine and its monitoring software is actually operational. For this reason it is imperative to have at least two independent machines dedicated for alerting staff of a problem. In addition to just being separated into ...
NATIONAL OPEN UNIVERSITY OF NIGERIA  SCHOOL OF SCIENCE AND TECHNOLOGY 1
NATIONAL OPEN UNIVERSITY OF NIGERIA SCHOOL OF SCIENCE AND TECHNOLOGY 1

... can exchange information. A small network can be as simple as two computers linked together by a single cable. This course introduces you to the hardware and software needed for a network, and explains how a small network is different from larger networks and the Internet. Most networks use hubs to ...
PPT
PPT

... sender that pkt received OK – Negative acknowledgements (NAKs): receiver explicitly tells sender that pkt had errors – Sender retransmits pkt on receipt of NAK ...
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Deep packet inspection

Deep Packet Inspection (DPI, also called complete packet inspection and Information eXtraction or IX) is a form of computer network packet filtering that examines the data part (and possibly also the header) of a packet as it passes an inspection point, searching for protocol non-compliance, viruses, spam, intrusions, or defined criteria to decide whether the packet may pass or if it needs to be routed to a different destination, or, for the purpose of collecting statistical information. There are multiple headers for IP packets; network equipment only needs to use the first of these (the IP header) for normal operation, but use of the second header (TCP, UDP etc.) is normally considered to be shallow packet inspection (usually called Stateful Packet Inspection) despite this definition.There are multiple ways to acquire packets for deep packet inspection. Using port mirroring (sometimes called Span Port) is a very common way, as well as an optical splitter.Deep Packet Inspection (and filtering) enables advanced network management, user service, and security functions as well as internet data mining, eavesdropping, and internet censorship. Although DPI technology has been used for Internet management for many years, some advocates of net neutrality fear that the technology may be used anticompetitively or to reduce the openness of the Internet.DPI is used in a wide range of applications, at the so-called ""enterprise"" level (corporations and larger institutions), in telecommunications service providers, and in governments.
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