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File - SSUET COMPUTER SCIENCE
File - SSUET COMPUTER SCIENCE

... Pentagon’s Advanced Research Projects Agency (ARPA), an agency of the U.S.Department of Defense. ARPA’s goal was to build a network that (1) allowed scientists at different physical locations to share information and work together on military and scientific projects and (2) could function even if pa ...
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Presentation - ece.virginia.edu

... Leased lines ...
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Data Communications and Computer Networks

... Application Layer Responsible for providing services to the user ...
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... Encourage more interactive discussion, fewer and/or shorter talks Provide more context, clearly define terms, review related work Place read-ahead material on the Web before retreat Organize sessions according to topic and/or research area ...
Internetworking
Internetworking

... • Getting various technologies to work with one another (i.e. creating a single “network” from many heterogeneous systems). – Problem magnified since packet may need to traverse several different networks (and network technologies), each with their own addressing schemes, service models, media acces ...
cis620-2
cis620-2

...  TCP is used for session-based data transmission, client-server applications, and critical services.  TCP headers require extra bits to provide proper sequencing of information.  To guarantee successful data delivery, the protocol also requires that the recipient acknowledge successful receipt of ...
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the importance of securing workstations

... number of issues.7 Firewalls are more flexible but can be difficult to configure correctly. The problem with firewalls is that IP addresses are unauthenticated. Just because an incoming IP address matches the one used by Debbie Sipiyae in Accounting doesn’t mean that the packet wasn’t generated by J ...
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ISO Layer and TCP Fundamentals

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... States that a user should have only the privileges needed to do his job. Least privilege is enforced using a network device, such as a router with an access control list (ACL) which tells a computer operating system which access rights each user has to a particular object. ...
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... Protocols at this level transmit data in a network representation that is independent of the representations used in individual computers, which may differ. Encryption is also performed in this layer, if required. At this level reliability and adaptation are performed, such as detection of failures ...
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Network Management Protocols

... Sometimes this is referred to as a manager managing a manageable device, and in this manager is a database that contains the information collected by an agent and then processed. The manager is typically a server with network management software on it that sends requests to the agents, which are loc ...
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CSE331-35
CSE331-35

... • A denial-of-service attack is characterized by an explicit attempt by attackers to prevent legitimate users of a service from using that service. Examples include – attempts to "flood" a network, thereby preventing legitimate network traffic – attempts to disrupt connections between two machines, ...
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Network Security - University of Hull

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3rd Edition: Chapter 2 - Northwestern Networks Group
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... Skype  voice-over-IP P2P application  centralized server: finding address of remote party:  client-client connection: direct (not through server) Instant messaging  chatting between two users is P2P  centralized service: client presence detection/location • user registers its IP address with ce ...
IST346: Services - Syracuse University
IST346: Services - Syracuse University

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Intro to Internet-services from Security Standpoint
Intro to Internet-services from Security Standpoint

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LAN - Redbrick
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... • Two types of repeater: Class I and Class II. – A Class I repeater allowed to have larger timing delays, and operates by translating line signals on an incoming port to digital form, and then retranslating them to line signals when sending them out on the other ports. – Possible to repeat signal be ...
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A day in the life of an IEEE802.11 Station

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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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