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LAN design issues
LAN design issues

... Provide protection from programs that crash Provide a mechanism for file transfer Provide multi tasking Allow background processes to take place ...
End of Chapter Solutions Template
End of Chapter Solutions Template

... regularly the same host or sender. You would need to review your mail server’s logs or review individual email inboxes to determine the IP address from which the message originated. You could then set up rules that would block packets from those IP addresses specifically. This would block only a sma ...
Document
Document

... Provide protection from programs that crash Provide a mechanism for file transfer Provide multi tasking Allow background processes to take place ...
Network Security
Network Security

... – Stateful packet filtering: records state of a connection between an internal computer and an external server; makes decisions based on connection and rule base ...
Chapter 13 WAN Technologies and Routing
Chapter 13 WAN Technologies and Routing

... moved from one connection to another.  Each packet switch is a dedicated computer with memory and I/O ports to send/receive packets.  A packet switch is the basic building block of WAN. A WAN is formed by interconnecting a set of packet switches, and then connecting computers. Additional switch or ...
CH06
CH06

... After reading this chapter, the reader should be able to: Understand the rationale for the existence of networks. Distinguish between the three types of networks: LANs, MANs, and WANs. Understand the OSI model and TCP/IP. List different connecting devices and the OSI layers in which each device oper ...
Data Link Layer
Data Link Layer

... The medium access control sublayer, or MAC, determines to a great extent the power consumption, reliability, and scalability of wireless sensor network deployments. To achieve lifetimes of years on low-cost batteries, current radios must operate at duty cycle of less than 1% or even 0.1%. When all n ...
Designing a VoIP Network
Designing a VoIP Network

... 1. An initial estimate of the number of MGCs 2. To allocate MGs to MGCs 3. To determine the total BHCA to be supported by ...
How the Internet works
How the Internet works

... – It’s always on – It is “free” – It’s (almost) never noticeably congested (though individual sites or access points might be) – you can get messages to anywhere in the world instantaneously – you can communicate for free, including voice and video conferencing – you can stream music and movies – it ...
Intrusion Detection Systems
Intrusion Detection Systems

... • A common approach to foil detection by firewalls is to break packets involved in an attack into multiple packets so that the firewall cannot detect it based on a single packet. • If a firewall can track all packets belonging to a session, it has a better chance at detecting an attack. • Whereas pa ...
Introduction and Overview - Assignment #1
Introduction and Overview - Assignment #1

... cohesive functionality by using services provided by the layer directly below, which ensures low-coupling and an optimal architectural design. In addition, the functionality provided by each layer can be modified without requiring modifications to the overall system. The Major disadvantages with a l ...
9/13/2010 Computer Network? The “nuts and bolts” view of the Internet
9/13/2010 Computer Network? The “nuts and bolts” view of the Internet

... ❍ No reliability ❍ No congestion & flow control services q Useful for network applications that ...
Solution
Solution

... A router is a layer-3 switch and a switch is a layer-2 packet switch. The pros are switch’s plug-and-play, high filtering and forwarding. 4. Why are acknowledgements used in 802.11 but not in wired Ethernet? (1 point) ...
Yard Wars
Yard Wars

... full control of all parts of the user interface. • Easily upgradeable to include sprites (animations), sound effects, and other features. ...
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Security+ Guide to Network Security Fundamentals

... Packet filter allows external traffic only to services provided by DMZ servers ...
Chapter1R_v2
Chapter1R_v2

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Career Highlights - University of the Pacific
Career Highlights - University of the Pacific

... Successfully reduced team of seven engineers to four while increasing accountability of assignments. Spearheaded creation of a Centralized Network Operations Center, which reduced staff and increased outage response time. Decreased network outage times by implementing monthly maintenance window duri ...
powerpoint
powerpoint

... • Protocol defining how to send packets within a LAN (local area network) • Developed at Xerox PARC in early ’70s • Packet based, distributed administration • A broken node does not affect the network ...
IP Encapsulator
IP Encapsulator

... DVB IP Encapsulator, the CMR-8500. This new product is built on a professional 1RU rack-mountable, embedded platform that has been tuned for high speed data applications. With two Gigabit Ethernet inputs and dual ASI outputs, the CMR-8500 is capable of total network throughput up to 155 Mbps and an ...
The TCP/IP reference model and OSI reference model IPv4 vs. IPv6
The TCP/IP reference model and OSI reference model IPv4 vs. IPv6

... IPv4 vs. IPv6: Much of the information within this tool is intended for use with IP version 4 (IPv4), the current IP standard. IP version 6 (IPv6) is on the horizon, however, and you should understand the differences between it and IPv4. To help you do so, we've included a section comparing IPv6 and ...
Define the Circuit Switching, Message Switching, and Packet
Define the Circuit Switching, Message Switching, and Packet

... Hardware and software interfaces Network reliability ...
download
download

... Provide a link between networks Provide for the routing and delivery of data between processes on end systems attached to different networks Provide these functions in such a way as not to require modifications of the networking architecture of any of the attached ...
Quiz on ICND chapter 3
Quiz on ICND chapter 3

... Name the seven layers of the OSI reference model, and describe their main purpose. a. b. ...
Are you looking for an easier way to initiate and
Are you looking for an easier way to initiate and

... -" !        -! A connectionless oriented protocol often used for time sensitive, low latency    Malicious software or code that typically damages or disables, takes control of, or steals information from a computer system. Broadly includes viruses, worms, Trojan horses, logic bo ...
Diapositiva 1
Diapositiva 1

... PSTN ...
< 1 ... 456 457 458 459 460 461 462 463 464 ... 474 >

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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