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Middleware
Middleware

... • The main purpose of middleware services is to help solve many application connectivity and interoperability problems. However, middleware services are not a panacea: – There is a gap between principles and practice. Many popular middleware services use proprietary implementations (making applicati ...
ppt
ppt

... • Poor locality: 1M concurrent type of packets in backbone. 5 packets to same destination • Latencies large, e.g. 100 ms for wide area • Wire speed forwarding ...
Cisco netManager IP Infrastructure 1.0 Product Overview
Cisco netManager IP Infrastructure 1.0 Product Overview

... Supports a broad range of Cisco network devices, third-party network devices including small and medium-sized business (SMB) desktop devices like servers, printers, and workstations. This will help customers to monitor their entire network using one product end to end. ...
Transport Layer
Transport Layer

... specifies server-> receiver initial seq. # 3: Transport Layer 3a-48 ...
the Presentation
the Presentation

... Quickly respond to alerts and unusual patterns on your network ...
The Internet and Its Uses
The Internet and Its Uses

... rest of the network.  The access layer can include routers, switches, bridges, hubs, and wireless access points (AP).  The main purpose of the access layer is to provide a means of connecting devices to the network and controlling which devices are allowed to communicate on the network. ...
About the Presentations
About the Presentations

... • Firewall performs same types of functions as does a security guard at a checkpoint – Monitors entry and exit points – Scans for viruses and repairing infected files before they invade the network – Can be configured to send out alert messages and notify staff of break-ins or if viruses are detecte ...
Contents - Andrew Noske
Contents - Andrew Noske

... Encapsulation wraps data with the necessary protocol info before network transit. , as the data packet moves down through the layers of the OSI model, it receives headers, trailers, & other info. [note: the word "header"  means address info has been added.] Build the data  user sends e-mail; alph ...
Routing
Routing

... – took neither latency or bandwidth into consideration ...
ch4_1040106update
ch4_1040106update

... All nodes can communicate with each other by broadcast at the link layer An n -port router could separate one broadcast domain into n broadcast ...
Switched LAN Architecture
Switched LAN Architecture

... in to three layers: access, distribution, and core. Access Layer The access layer interfaces with end devices, such as PCs, printers, and IP phones, to provide access to the rest of the network. The access layer can include routers, switches, bridges, hubs, and wireless access points. The main purpo ...
RouterA(config)# ip route
RouterA(config)# ip route

... Autonomous Systems An autonomous system (AS) is a collection of networks under a common administration. The American Registry of Internet Numbers (ARIN) assigns an identifying number to each AS. AS is a 16 bit number. ...
Chapter 5
Chapter 5

... All Internet traffic aimed at any computer within an organization's LAN will be sent over the Internet using the router’s IP public address for the given computer.  The router will receive all packets for all computers for the organization’s computers.  When the router receives a packet, it determ ...
Implementing a Secure Internal Network
Implementing a Secure Internal Network

... In consideration of this network design, it can be noted that a sniffer could be placed anywhere on the network to view network traffic. This poses a risk to the network since passwords could be retrieved. Since this is a bridged network, it is not possible to effectively isolate and protect the wor ...
Industrial use of Erlang
Industrial use of Erlang

... “Normal” synchronization primitives - semaphores or monitors  does not look the same in Erlang  instead everything is done with processes and message passing. Mutual exclusion:  use a single process to handle resource  clients call process to get access. Critical sections:  allow only one proce ...
IP Network Configuration for Traffic Engineering
IP Network Configuration for Traffic Engineering

... Router level Significance (will not cause inconsistency) • Similar to local variable • For example: access-list ...
ATM
ATM

...  This creates two levels of virtual connections  A corporation has two sites connecting to a public ATM network and each site the corporation has a network of ATM switches  We can establish a virtual path between two sites using ...
Wireless Data Communication
Wireless Data Communication

... – Fine Granularity: per flow treatment, flexible set of QoS parameters – Able to provide QoS guarantees (if admission, classification, scheduling is performed correctly) Disadvantages – Scalability problem: management of state for each single flow – Complexity (already connection admission can be co ...
IP: Internet Protocol - ODU Computer Science
IP: Internet Protocol - ODU Computer Science

...  outgoing datagrams: replace (source IP address, port #) of every outgoing datagram to (NAT IP address, new port #) . . . remote clients/servers will respond using (NAT IP address, new port #) as destination addr  remember (in NAT translation table) every (source IP address, port #) to (NAT IP add ...
Chapter 7
Chapter 7

... • Limiting access to information reduces the threat against it • Only those who must use data should have access • The amount of access granted to someone should be limited to what that person needs to know • Limiting is more than placing a password on a system • Users should have the least amount o ...
NetFlow's limitations
NetFlow's limitations

... sFlow and NetFlow provides extended visibility, probe delivers detailed drill-down For continuous visibility of every packet on the remote network, you would need to deploy multiple probes to continuously collect SPAN sessions from each switch. This is usually not practical or desirable. Combining N ...
Megaplex-2100H Module Voice over IP Gateway/Gatekeeper Module
Megaplex-2100H Module Voice over IP Gateway/Gatekeeper Module

... that supports VoIP. The agent’s MIB (Management Information Base) is compliant with the H.341 standard. The SNMP agent enables managing the MVG (including configuration and performance monitoring) via the RADview Network Management System as part of the Megaplex-2100H application. Alternatively, MVG ...
Integrating Cisco Press Resources into the Academy Classroom
Integrating Cisco Press Resources into the Academy Classroom

... value 1024 (210) through 65,535 (216 - 1) – When a host starts a new application process, it allocates a dynamic port number that is not already in use by another process – By each process having its own port number, a PC can have multiple conversations with other PCs (sometimes called multiplexing) ...
Week13_1 - FSU Computer Science Department
Week13_1 - FSU Computer Science Department

... • The receiver may advertise small windows. • The sender then sends small segments --- not very efficient. • TCP requires the receiver only advertise window of one MSS or half of its buffer, which ever is smaller. ...
Switching and Forwarding
Switching and Forwarding

... If any bridge does not receive I configuration message after a period of time, it starts generating configuration messages claiming to be the root. CSS432: Switching and Bridging ...
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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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