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System Level Design for Clustered Wireless Sensor Networks
System Level Design for Clustered Wireless Sensor Networks

... remote central station in a multi-hop fashion. In manufacturing lines, sensors are typically grouped around specific points of interest in a manufacturing cell (i.e. the end of a rail or around some robots). From a network perspective, these are all clustered topologies, and although the size and th ...
Module 2: Networking Fundamentals
Module 2: Networking Fundamentals

... specific Internet routes, and while a specific set of data is transmitted on the network. Throughput is often far less than the maximum possible digital bandwidth of the medium that is being used. Throughput <= Digital Bandwidth of a medium The factors that determine throughput ...
Capturing and Processing One Million Network Flows Per Second
Capturing and Processing One Million Network Flows Per Second

... • Capture or synthesize Netflow export packets (in several versions) • Play back at varying speeds, with peak bursts • Instrument hardware, OS, and software pipeline to identify performance bottlenecks ...
Mobile IP Supplement
Mobile IP Supplement

... Note: Mobile IP has two addresses for a mobile host: one home address and one care-of address. The home address is permanent; the care-of address changes as the mobile host moves ...
IOSR Journal of Computer Engineering (IOSRJCE)
IOSR Journal of Computer Engineering (IOSRJCE)

... A wireless LAN or WLAN is a wireless local area network, which is the linking of two or more computers without using wires. WLAN utilizes spread-spectrum or OFDM (802.11a) modulation technology based on radio waves to enable communication between devices in a limited area, also known as the basic se ...
PPT - EECS
PPT - EECS

... 2. Host A uses ARP to determine the LAN address for 111.111.111.002, namely 22-2222-22-22-22. 3. The adapter in A creates an Ethernet packet with destination address of 22-22-2222-22-22 4. The first router receives the packet and extracts the datagram. The forwarding table in this router indicates t ...
conclusion
conclusion

... from(DNS) Domain Name System in the form of numbers call (IP)address or internet protocol address which are numerical identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide. ...
Addresses
Addresses

... TCP/IP (Cont.) Layer 5: Application Specifies how one application uses the internet ...
AIN: A Blueprint for an All-IP Data Center Network.
AIN: A Blueprint for an All-IP Data Center Network.

... AIN uses IP layer firewall rules, enforced by the hypervisors, to prevent unauthorized direct communication between VMs. The default firewall policy is to drop all incoming and outgoing traffic. When a hypervisor hosts a new VM, it adds a set of accept rules into its firewall. The first rule allows ...
Let`s ChronoSync: Decentralized Dataset State Synchronization in
Let`s ChronoSync: Decentralized Dataset State Synchronization in

... At the same time, users in different group will not be able to recognize each other’s state digest. This is illustrated in Fig. 6, where Alice and Bob reply to the sync interests at the same time and only Bob’s sync data reaches Ted. Thus, the new state digest of Alice is different from that of the ...
dhs-aug2006 - Princeton University
dhs-aug2006 - Princeton University

... • Vulnerabilities are being exploited – Configuration errors and malicious attacks – Route hijacking, blackholes, denial-of-service, … ...
slides - network systems lab @ sfu
slides - network systems lab @ sfu

... • Typically open  ...
PPTX - ME Kabay
PPTX - ME Kabay

... Client PCs and other devices on internal networks have dynamic (temporary) addresses on Internet Problems arise because DHCP may assign different IP addresses on subsequent uses  P2P (peer-to-peer) applications less secure Need to locate peer despite change of IP address Exploited by P2P softwa ...
Top-Down Network Design
Top-Down Network Design

... • Router maintains a routing table that lists known networks, direction (vector) to each network, and the distance to each network • Router periodically (every 30 seconds, for example) transmits the routing table via a broadcast packet that reaches all other routers on the local segments • Router up ...
Slide 1
Slide 1

... The first octet of the network ID cannot be 127. The network and host ID bits cannot be all 1s. The network and host ID bits cannot be all 0s. The host ID for each computer must be unique. A unique network ID is required for each network and wide area connection. – A registered network ID is require ...
Interworking Wi-Fi and Mobile Networks
Interworking Wi-Fi and Mobile Networks

... between Wi-Fi and other access technologies such as WCDMA/HSPA, CDMA2000 1X, WiMAX and LTE. 1 In the mobile world, handoff (mostly used in America) or handover (mostly used in UK) refers to the mobile device move from one radio cell to another without dropping voice or data services; roaming refer ...
P00555: Multiservice Networks
P00555: Multiservice Networks

... ◦ Useful for overriding normal route selection based on least cost path  E.g. for enforcing route selection (‘routing policy’) ...
Overview - University of Victoria
Overview - University of Victoria

... Basically all UDP provides is a multiplexing capability on top of IP. The length field gives the length of the entire packet including the header. The checksum is calculated on the entire packet (and also on part of the IP header). Calculating the checksum is optional, and if an error is detected th ...
Top-Down Network Design
Top-Down Network Design

... • Router maintains a routing table that lists known networks, direction (vector) to each network, and the distance to each network • Router periodically (every 30 seconds, for example) transmits the routing table via a broadcast packet that reaches all other routers on the local segments • Router up ...
Lecture (TCP)
Lecture (TCP)

... unused buffer space by including rwnd value in segment header ❒  sender: limits # of unACKed bytes to rwnd ...
SIS-DTN_Green Book v0.6-v0.7 changes
SIS-DTN_Green Book v0.6-v0.7 changes

... support higher-layer protocols. CCSDS currently has three recommended data structures that could serve as end-to-end network layer protocols: the CCSDS Space Packet Protocol, the Space Communications Protocol Specification – Network Protocol (SCPS-NP), and the Internet Protocols (IPv4/IPv6). For var ...
Internet History and Architecture
Internet History and Architecture

...  The split-horizon fix solves the count-to-infinity problem in RIP. The sequence number and age fields are used in OSPF to optimize on the number of packets flooded into the network. VLSM support is why RIP is preferred over OSPF in small autonomous systems  The “core” architecture wit ...
Vorgud_8
Vorgud_8

... • Keeps copies of recently requested objects in its own disk storage. • Content distribution. ...
3G Cellular Systems: Cdma 2000
3G Cellular Systems: Cdma 2000

... forward packets from incoming network interfaces to outbound interfaces according to routing tables based on IP address in packet header ...
Slides - TERENA Networking Conference 2004
Slides - TERENA Networking Conference 2004

... • Network conditions are unpredictably changing and not under control (e.g. Ad hoc nets, PLC networks, etc.) • QoS in terms of bandwidth and delay cannot be guaranteed just with network-layer QoS mechanisms • In these cases, user-perceived QoS can be improved using applications being able to adapt t ...
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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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