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The Packet Filter: A Basic Network Security Tool
The Packet Filter: A Basic Network Security Tool

... operating systems can be configured for packet filtering. Packet filtering can be added to *nix operating systems. Support for packet filtering via ipchains is included by default in the Linux kernel. Windows NT and Windows 2000 support packet filtering. Virtually all commercial firewalls support pa ...
Network Layer - SI-35-02
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... the data through the network. • The function of the network layer is to find the best path through the network. • The network layer's addressing scheme is used by devices to determine the destination of data as it moves through the network. • In this chapter, you will learn about the router’s use an ...
40-Computer Network Tech
40-Computer Network Tech

... You have a network that consists of three virtual local area networks (VLANs) defined on all of the switches within the network. VLAN 10 is the Sales VLAN, VLAN 20 is the Marketing VLAN, and VLAN 30 is the Accounting VLAN. Users complain that they can’t communicate with anyone outside of their own V ...
General Overview of Attacks
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... damage, understand the attack mechanism, and reduce the possibility if future attacks are of the same type. ...
Broad-Band Satellite Networks
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... MN acquires new IP address (CoA) Registration with HA: notify HA of new location Data packets routed to default MN’s home Tunneling: HA redelivers based on CoAs registered ...
Introduction to Cisco Networking Technologies
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... The Physical layer defines all the electrical and physical specifications for devices. In particular, it defines the relationship between a device and a physical medium. This includes the layout of pins, voltages, and cable specifications. Hubs, repeaters, network adapters and Host Bus Adapters (HBA ...
UNIT name: IP protocol
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... transport layer), and of course it needs partners who communicate (as network layer). You already understand that there must be some kind of physical phenomenon to transport this communication to the partner (as physical layer, including rules in physical environment like frequency etc.). In reality ...
Tonga Institute of Higher Education IT 141
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... • 2. Microwaves – These can carry a lot of data, but need a direct line of sight to work well • Because radio and micro waves cannot bend to go around the curve of the earth, satellites are used in space to transmit signals around the globe • 3. Infrared light – uses light waves to transmit data. On ...
Local Area Networks, 3rd Edition David A. Stamper
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... installation is not impeded by the needs of existing users. LAN administrators must plan upgrades carefully to minimize the disruption to LAN users. • Ideally, the administrator can first install and test all hardware and software upgrades on an experimental LAN, that is, a small LAN separate from t ...
emc165_internet - Computer Science & Engineering
emc165_internet - Computer Science & Engineering

... use the T1 line, unless it is not available. If T1 is not available, then the ISDN line will be used. The router also has rules limiting how computers from outside the network can connect to computers inside the network and how the office network appears to the outside world, and other security func ...
Abacus 5000 Hands-on Training Seminar
Abacus 5000 Hands-on Training Seminar

... The document to which this cover statement is attached is submitted to a Formulating Group or sub-element thereof of the Telecommunications Industry Association (TIA) in accordance with the provisions of Sections 6.4.1–6.4.6 inclusive of the TIA Engineering Manual dated March 2005, all of which prov ...
transport layer
transport layer

... that can be either interior or exterior. • Exterior routing protocols are those operating outside of or between networks. Because there are many more possible routes, exterior routing is far more complex than interior routing. Thus, exterior routing protocols can’t maintain tables of every single ro ...
IP Addresses - Sistel IMT 2010
IP Addresses - Sistel IMT 2010

... IP address is the set of numbers many people see on their workstations or terminals, such as 127.40.8.72, which uniquely identifies the device if a network is not connected to the Internet, that network can determine its own numbering For all Internet accesses, the IP address must be registered with ...
MultiNet: Connecting to Multiple IEEE 802.11 Networks Using a
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... • Gateway Node • Increased Capacity • Virtual Machines ...
IP: Datagram and Addressing
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... BOOTP can be used by a client that already knows its IP address (e.g., to obtain boot file information) A client that knows its IP address places it in the client IP address field; other clients set this field to zero If the client’s IP address in the request message is zero, a server returns the cl ...
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... results to expect  Protocol – how it “talks” to its peer layer - how a layer works (i.e. provides the offered services) ...
IOSR Journal of Computer Engineering (IOSR-JCE)
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... required in various fields like in military and rescue operations, virtual class room sessions, crisis management services, collaborative computing etc [1] [7]. This instant requirement has been furnished through Mobile Adhoc Network (MANETs). These networks have shown a revolutionary development as ...
Document
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... IP is a form of packet switching  Data is broken up into discrete chucks and then sent toward destination  Each packet has to find its own route to the destination. There is no predetermined path; the decision as to which node to hop to in the next step is taken only when a node is reached.  Each ...
ECE 654: Computer Networks Final Exam
ECE 654: Computer Networks Final Exam

... Yes two people can agree on a common private key over a network using the Diffie-Hellman Key Exchange Algorithm. Trudy can still break it pretending that she is either or Alice (manin-the-middle attack) 20. What are the possible approaches for delivering quality of service guarantees in networked ap ...
Networking Standards and the OSI Model
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... • Protocols accept frames from Data Link layer and generate voltage to transmit signals • When receiving data, protocols detect voltage and accept signals • Protocols also set data transmission rate and monitor data error rates – Cannot perform error correction ...
REBOOK
REBOOK

... can be applied to existing or new protocols provides interaction and feedbacks between the network and the hosts/applications provides circuit performance for packet forwarding, for ...
prosafel3switch_trai..
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... » Routers “route” traffic between separate L2 VLANs » VLANs are isolated broadcast domains • If you connect 2 together it becomes one large broadcast domain » VLAN can also be thought of as a “network” • A group of hosts that share the same network prefix (192.168.1.x) » Decision for next hop is bas ...
LinkProof Data Sheet
LinkProof Data Sheet

... Rampant virus or Denial of Service (DoS) attacks can impact the availability and performance of your business in the exact same way that a down link can, damaging your reputation and your bottom line. LinkProof provides a secure, single point of entry to your network, offering a first-line of defens ...
Slide 1
Slide 1

... • MIPs:125,000 (Million Instruction Per Second) • 1 billion transistors …. ...
Local Area Networks
Local Area Networks

... will solve this switch, problem? switch will flood the ping request out all ports. ...
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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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