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Lecture No. 10
Lecture No. 10

... connectionless service are as follows: It includes extension of LAN abstraction. It has universal addressing and the data is delivered in packets (frames), each with a header. It combines collection of physical networks into a single virtual network. Transport protocols use this connectionless servi ...
Spirent Journal of IEEE 802.3ba 40/100 GB Ethernet PASS
Spirent Journal of IEEE 802.3ba 40/100 GB Ethernet PASS

... Imprecise clocking between systems at 40/100 GB can increase latency and packet loss. Testing with backwards compatible system is critical. Latency issue is an important issue. At 10 GB, especially at high densities, the specification allows for a little variance for clocks. As you aggregate traffic ...
GPF_2_2007_peer_cariden
GPF_2_2007_peer_cariden

... Summary • Peering/transit links are some of the most expensive and difficult to provision links • We can improve capacity planning on such links by modeling the network • BGP modeling can be much more complex than IGP modeling – Some required information is not even available ...
Topic 16: Routing in IP over ATM networks
Topic 16: Routing in IP over ATM networks

... account the saving of virtual connections by multiplexing different protocols into a single VC. The LLC/SNAP encapsulation defined in RFC1483 is the most common encapsulation in IP over ATM networks. The basic functionality of the classical model is to resolve ATM to IP address mapping. Each LIS con ...
Ad hoc and Sensor Networks Chapter 11: Routing protocols
Ad hoc and Sensor Networks Chapter 11: Routing protocols

... multiple nodes are destination (graph has multiple sinks)  GeoTORA: All nodes in the destination region act as sinks  Forwarding along DAG; all sinks also locally broadcast the packet in the destination region ...
Link Layer
Link Layer

...  seldom used on low bit-error link (fiber, some twisted pair)  wireless links: high error rates • Q: why both link-level and end-end reliability? 5: DataLink Layer ...
Doc09 - Go to top
Doc09 - Go to top

... throughout the industry. A network consists of any number of devices which can communicate through some arbitrary method. Devices of this nature include computers, printers, routers, and so forth, and may reside in geographically diverse locations. The methods in which they may communicate are numer ...
Extending SAHN-MAC for Multiple Channels
Extending SAHN-MAC for Multiple Channels

... Throughput degraded by 35% (1.7 Mbps) End-to-end delay increased by 550% (559 ms) ...
C07-Wireless_LANs_f
C07-Wireless_LANs_f

... low power for battery use no special permissions or licenses needed to use the LAN robust transmission technology simplified spontaneous cooperation at meetings easy to use for everyone, simple management protection of investment in wired networks security (no one should be able to read my data), pr ...
Link Layer
Link Layer

...  seldom used on low bit-error link (fiber, some twisted pair)  wireless links: high error rates • Q: why both link-level and end-end reliability? 5: DataLink Layer ...
Securing Cyber Space: Safeguarding Access to Critical Resources Peter Hager, CEO
Securing Cyber Space: Safeguarding Access to Critical Resources Peter Hager, CEO

... We have found applications transmitting USERID and PASSWORD as User Data, of which many of them were of privileged users / administrators. In a conference call, network team assured that this was just inside their own network. Closer analysis of recordings revealed that USERIDs and PASSWORDs were di ...
On Supporting Mobility and Multihoming in Recursive Internet
On Supporting Mobility and Multihoming in Recursive Internet

... If an application process in RINA needs to communicate with another application process, it requests service from the underlying Distributed IPC Facility (DIF). This DIF maps the destination application name to a node (process) address. A DIF in RINA can (recursively) provide transport services betw ...
Risk Assessment: Intercepting VoIP Calls
Risk Assessment: Intercepting VoIP Calls

... The goal of risk assessment is to quantitatively evaluate the risk of an undesired event in a given environment. In our case, the environment has been fixed in Section II as the reference architecture of a VoIP system; in addition, the undesired event is clear, i.e., intercepting a phone call. There ...
Data Logistics in Network Computing: The Logistical Session Layer
Data Logistics in Network Computing: The Logistical Session Layer

... vein, we believe that there are several reasons that intermediate TCP processing helps, rather than hurts, endto-end bandwidth performance. First, since the roundtrip time (RTT) between any two depots is shorter than the end-to-end round-trip-time, LSL allows the inherent TCP congestion-control mech ...
Campground and RV Park Wi-Fi Planning
Campground and RV Park Wi-Fi Planning

... connectivity between these devices and the Internet or a network. Power-over-Ethernet4 (PoE) – A technology for wired Ethernet LANs that allows the electrical current necessary for the operation of each device to be carried by the data cables rather than power cords. The result is lower cost, less d ...
01 Fundamentals of Networking
01 Fundamentals of Networking

... • “A network is a set of devices (nodes) connected by media links. A node can be a computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the network. The links connecting the devices are often called communication channels.” • E.g. two PCs connec ...
Alteon Stackable Web Switches 180 and ACEdirector Series
Alteon Stackable Web Switches 180 and ACEdirector Series

... through firewall, VPN, and IDS load balancing. Alteon Web Switches also provide security monitoring features such as SYN Attack Alarms and Enhanced Port Mirroring (VLAN based, ingress/egress traffic monitoring). Proactive network security features such as Layer 7 Deny Filters and Application Abuse P ...
Basic Concepts
Basic Concepts

... – No need to wait until the entire file is downloaded before beginning to see or hear it ...
3rd Edition: Chapter 4
3rd Edition: Chapter 4

... Two key router functions:  run routing algorithms/protocol (RIP, OSPF, BGP)  forwarding datagrams from incoming to outgoing link ...
Expanded Notes: DHCP in the Network
Expanded Notes: DHCP in the Network

... from a central location, rather than requiring an administrator to log into each device and change the IP configuration individually. ...
V.MoIP - Telecommunications Industry Association
V.MoIP - Telecommunications Industry Association

... Recommendations, or with national regulatory requirements, and shall be interpreted accordingly. In order to be compliant with this Recommendation an implementation must provide functionality that is defined as being mandatory. ...
EC Council CHFI Certification: Course CF220
EC Council CHFI Certification: Course CF220

... particular type of attack profile – It can alert the incident response team as soon as the attack takes place ...
CH4-SDNbasics
CH4-SDNbasics

... Notoriously difficult to manage Evolves very slowly ...
The Top 10 DDoS Attack Trends
The Top 10 DDoS Attack Trends

... understand. A common approach is to “swarm” a target server with thousands of communication requests originating from multiple machines. In this way the server is completely overwhelmed and cannot respond anymore to legitimate user requests. Another approach is to obstruct the network connections be ...
IP Datagram Header - California State University, Long Beach
IP Datagram Header - California State University, Long Beach

... H.LEN -- 4-bit header specifies the number of 32-bit quantities in the header (If no options, the value is 5) SERVICE TYPE -- 8-bit field that carries a class of service for the datagram (seldom used in practice) TOTAL LENGTH -- 16-bit integer that specifies the total number of bytes in the datagram ...
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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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