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Document
Document

... spoofed source IP address that S used looks legitimate but is not assigned to any real host. • If A is unreachable, B has a rather long wait for the 3rd packet of the handshake. ...
cs2307-computer networks lab manual
cs2307-computer networks lab manual

... on, is a reliable connection-oriented protocol that allows datastreams coming from a machine connected to the Internet to be received without error by any other machine on the Internet. UDP however, is an unreliable connectionless protocol that does not guarantee accurate or unduplicated delivery of ...
TCP/IP model
TCP/IP model

... determining when it is time to send a datagram • It is possible for an application to tell TCP to send the data it has buffered without waiting for a buffer to fill up ...
交大資工蔡文能計概
交大資工蔡文能計概

... • TCP/IP combines the OSI data link and physical layers into one layer (或說 TCP/IP 沒有定義實體層) • TCP/IP appears simpler because it has fewer layers • TCP/IP protocols are the standards around which the Internet developed, so the TCP/IP model gains credibility just because of its protocols. In contrast, ...
RouterA(config)# ip route
RouterA(config)# ip route

... Routing Metrics (cont.) 1. Hop count: number of routing devices the packet needs to travel to reach the destination network - counts router hops 2. Bandwidth: cumulative bandwidth of the links to the destination measured in kilobits per second 3. Delay: length of time (in microseconds) a packet tak ...
Estimating Available Capacity of a Network Connection
Estimating Available Capacity of a Network Connection

... delay for packet delivery,  . Hence, if an application realizes that for its required transit delay, the available capacity is too low, it might decide to forgo sending packets during periods of low available capacity which may be below its minimum requirements from the network. Also, for uncontrol ...
NP5400 UG
NP5400 UG

... Page 10 ...
Routing Requirements: – Correctness – Simplicity - PolyU
Routing Requirements: – Correctness – Simplicity - PolyU

... pair of nodes in the network – Based on expected traffic or capacity – Only change when there is a change in the topology of the network ƒ Usually enter by a network administrator Adaptive routing – the route is automatically adjusted for topology or traffic changes A.37 ...
TCP/IP Protocol Suite
TCP/IP Protocol Suite

... • Host X begins by encapsulating the IP packet into a data link frame (in this case Ethernet) with RTA’s Ethernet 0 interface’s MAC address as the data link destination address. • How does Host X know to forward to packet to RTA and not directly to Host Y? How does Host X know or get RTA’s Ethernet ...
Timing is Everything: Accurate, Minimum Overhead, Available Bandwidth Estimation in High-speed Wired Networks
Timing is Everything: Accurate, Minimum Overhead, Available Bandwidth Estimation in High-speed Wired Networks

... at the receiver to infer the amount of cross traffic in the network. The key idea to such inferences: When the probing rate exceeds the available bandwidth, the observed packet characteristics undergo a significant change. The turning point where the change occurs is then the estimated available ban ...
Dynamic.Routing.Protocols Power
Dynamic.Routing.Protocols Power

... network, how does it find other routers and how does it announce its own presence?  The simplest method - to send the updates to the broadcast address 255.255.255.255.  Hosts and other devices uninterested in the routing updates will simply drop the ...
Content centric networking
Content centric networking

... Global entities /parc.com/people/presentations (name of some data) Local entities /thisRoom/projector (name of a projector) While global entities utilise the DNS global naming structure, local entities can point to different objects depending on location or other contexts ...
Network Working Group D. Awduche Request for
Network Working Group D. Awduche Request for

... performance evaluation, which is important for assessing the effectiveness of traffic engineering methods, and for monitoring and verifying compliance with network performance goals. Results from performance evaluation can be used to identify existing problems, guide network re-optimization, and aid ...
Chennai(config
Chennai(config

... • Doesn’t consider the bandwidth, works only with hop counts • Slow convergence • Formation of Routing loops ...
Timing is everything: Accurate, Minimum-cost, Available Bandwidth Estimation in High-speed Wired Network
Timing is everything: Accurate, Minimum-cost, Available Bandwidth Estimation in High-speed Wired Network

... at the receiver to infer the amount of cross traffic in the network. The key idea to such inferences: When the probing rate exceeds the available bandwidth, the observed packet characteristics undergo a significant change. The turning point where the change occurs is then the estimated available ban ...
Chapter5link
Chapter5link

... 5: DataLink Layer ...
Cisco uBR900 Series Cable Access Router
Cisco uBR900 Series Cable Access Router

... Software router in one platform that contains dedicated hardware to achieve high-speed IP Security (IPSec) VPN performance. Fully standards-based, Cisco uBR900 Series Cable Access Routers operate in DOCSIS bridge mode similar to compliant modems, but include routing, advanced firewall, and IPSec VPN ...
On Wavelength-Routed Networks With Reversible - PolyU
On Wavelength-Routed Networks With Reversible - PolyU

... optical signals in our proposed system need extra demultiplexing/multiplexing and switching processes when they are re-amplified (see the optical amplifier shown in Fig. 2) because of the direction configurability of each wavelength channel. The signal power loss caused by the extra processes may be ...
Transport Driver Interface
Transport Driver Interface

... Winsock Summary • Network API of choice for most low level network applications • Industry Standard on Unix systems • easy migration for BSD socket network applications. • New enhanced features such as QOS in 2.0 ...
2. FSF-1 Sea Fighter - Engineering Informatics Group
2. FSF-1 Sea Fighter - Engineering Informatics Group

... high. The Narada printed circuit board (PCB) has been carefully designed to preserve this resolution resulting in true 16-bit performance where the quantization error is just one bit (1/65536th of the input analog voltage range, which is 5 V). The third sensor module is the actuation module consisti ...
IPSO-6LoWPAN - University of California, Berkeley
IPSO-6LoWPAN - University of California, Berkeley

... • Lack of broadcast capability impedes or, in some cases, renders some protocols inoperable (e.g. DHCP). Broadcast media can also allow efficient operation of multicast, a core mechanism of IPv6 • Link-layer error recovery often increases end-to-end performance. However, it should be lightweight and ...
Network Support for IP Traceback - David Wetherall
Network Support for IP Traceback - David Wetherall

... leaves the ISP's border (and hence its administrative control over the routers). In the latter case, the upstream ISP must be contacted and the procedure repeats itself. While such tracing is frequently performed manually, several ISPs have developed tools to automatically trace attacks across their ...
Computer Networks Laboratory
Computer Networks Laboratory

... the same data stream. This allows more than one application to communicate with the communication partner at the same time. When the data reaches the remote partner, the Transport layer then disassembles the segment and passes the correct data to each of the receiving applications. ...
DataCenters
DataCenters

... CRC’s are commonly used at the link layer CRC’s can detect any bit error of up to r bits with an r-bit EDC. CRC’s are more resilient to bursty bit errors CRC’s can not correct bit errors ...
Network Node v1.1 Protocol Document
Network Node v1.1 Protocol Document

... Exchange Network evolves during its initial implementation. For example, the documents discuss and describe UDDI and other Registries as integral parts of the Network. Their use is implicit in the Protocol and Specification, but currently no official registries exist but they do merit discussion in ...
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Network tap

A network tap is a hardware device which provides a way to access the data flowing across a computer network. In many cases, it is desirable for a third party to monitor the traffic between two points in the network. If the network between points A and B consists of a physical cable, a ""network tap"" may be the best way to accomplish this monitoring. The network tap has (at least) three ports: an A port, a B port, and a monitor port. A tap inserted between A and B passes all traffic through unimpeded, but also copies that same data to its monitor port, enabling a third party to listen.Network taps are commonly used for network intrusion detection systems, VoIP recording, network probes, RMON probes, packet sniffers, and other monitoring and collection devices and software that require access to a network segment. Taps are used in security applications because they are non-obtrusive, are not detectable on the network (having no physical or logical address), can deal with full-duplex and non-shared networks, and will usually pass through traffic even if the tap stops working or loses power.
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