Introduction to Data Communications
... Local Area Network (LAN) • A local area network is usually privately owned and links the devices in a single office, building, or campus • LANs are designed to allow resources to be shared (i.e., printers or applications programs )between PCs or workstations • LANs are distinguished from other type ...
... Local Area Network (LAN) • A local area network is usually privately owned and links the devices in a single office, building, or campus • LANs are designed to allow resources to be shared (i.e., printers or applications programs )between PCs or workstations • LANs are distinguished from other type ...
Threats, Vulnerabilities, and Attacks
... could harm an asset. In other words, a threat is any bad thing that can happen to your assets. A vulnerability is a weakness that makes a threat possible. This may be because of poor design, configuration mistakes, or inappropriate and insecure coding techniques. An attack is an action that expl ...
... could harm an asset. In other words, a threat is any bad thing that can happen to your assets. A vulnerability is a weakness that makes a threat possible. This may be because of poor design, configuration mistakes, or inappropriate and insecure coding techniques. An attack is an action that expl ...
Modernization as a key to lower production costs
... (MES/ERP systems). This is called vertical integration. For a seamless work- and materialflow, both horizontal and vertical integration needs to be achieved. The necessary data exchange is typically realized using networks. Different systems hereby support different sets of protocols, similar to hum ...
... (MES/ERP systems). This is called vertical integration. For a seamless work- and materialflow, both horizontal and vertical integration needs to be achieved. The necessary data exchange is typically realized using networks. Different systems hereby support different sets of protocols, similar to hum ...
Chapter 6: Telecommunications & Networks
... Value-Added Carriers: Private telecom systems offering enhanced services for a fee Switched Lines: Circuits that use switching equipment to allow one device to connect to other devices (typical phone lines) Dedicated Lines: Point-to-point circuits with no switching or dialing Chapter 6 ...
... Value-Added Carriers: Private telecom systems offering enhanced services for a fee Switched Lines: Circuits that use switching equipment to allow one device to connect to other devices (typical phone lines) Dedicated Lines: Point-to-point circuits with no switching or dialing Chapter 6 ...
CRISTE
... “A recent Department of Defense study and continued technology advancements indicate that expanding the scope of the JTRS/SCA to all waveforms above 2 MHz frequency is now viable. Therefore, to enhance our warfighting capabilities and to improve integration of our communications systems through netw ...
... “A recent Department of Defense study and continued technology advancements indicate that expanding the scope of the JTRS/SCA to all waveforms above 2 MHz frequency is now viable. Therefore, to enhance our warfighting capabilities and to improve integration of our communications systems through netw ...
user manual
... preamble and header to create the PPDU. Two different preambles and headers are defined as the mandatory supported long preamble and header which interoperates with the current 1 and 2 Mbit/s DSSS specification as described in IEEE Std 802.11-1999, and an optional short preamble and header. At the r ...
... preamble and header to create the PPDU. Two different preambles and headers are defined as the mandatory supported long preamble and header which interoperates with the current 1 and 2 Mbit/s DSSS specification as described in IEEE Std 802.11-1999, and an optional short preamble and header. At the r ...
Computer Networks An Introduction
... A single cable called a trunk (backbone, segment) Only one computer can send messages at a time Passive topology - computer only listen for, not regenerate data ...
... A single cable called a trunk (backbone, segment) Only one computer can send messages at a time Passive topology - computer only listen for, not regenerate data ...
Nortel Networks Passport 1424T Ethernet Switch
... for workgroups and servers. The GBIC ports allow for connectivity of single and multi-mode fiber with support for Gigabit Ethernet SX, LX, XD, ZX as well as 1000BASE-T connectivity. Multi-layer redundancy is delivered by Multi-Link trunking capabilities that provide multiple ports acting as one tru ...
... for workgroups and servers. The GBIC ports allow for connectivity of single and multi-mode fiber with support for Gigabit Ethernet SX, LX, XD, ZX as well as 1000BASE-T connectivity. Multi-layer redundancy is delivered by Multi-Link trunking capabilities that provide multiple ports acting as one tru ...
PERSEUS CSP Communication Services Platform
... PERSEUS is a family of products and sub-systems both at Core Network and Terminal level that can be used as enabling products for building PMR networks of the next generation. The continuous evolution of communication networks, the availability of new access and transport technologies and the possib ...
... PERSEUS is a family of products and sub-systems both at Core Network and Terminal level that can be used as enabling products for building PMR networks of the next generation. The continuous evolution of communication networks, the availability of new access and transport technologies and the possib ...
Things we didn`t get to talk about
... – Dynamic: easy for administrators to make spontaneous changes ...
... – Dynamic: easy for administrators to make spontaneous changes ...
IP addresses
... layer 3 IP address is known. If host ‘A’ needs to send a a data packet to host ’B’, host ‘A’ broadcasts ARP request packet containing ‘A’s MAC address. Host ‘B’ upon receiving the ARP request replies with its MAC address directly (unicast) to host ‘A’ while other stations discard the ARP request. Ho ...
... layer 3 IP address is known. If host ‘A’ needs to send a a data packet to host ’B’, host ‘A’ broadcasts ARP request packet containing ‘A’s MAC address. Host ‘B’ upon receiving the ARP request replies with its MAC address directly (unicast) to host ‘A’ while other stations discard the ARP request. Ho ...
Gilad Ravid: Scale Free and Small Worlds Networks: Studying A
... Sensitivity to attacks We know how they form Information diffusion Rich get richer ...
... Sensitivity to attacks We know how they form Information diffusion Rich get richer ...
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... With a ring topology the devices are connected in a circle. Data travels from device to device around the ring. Star topology: Within a star topology, all devices are connected to a central hub or computer. All data that transfers from one computer to another must pass through the hub. ...
... With a ring topology the devices are connected in a circle. Data travels from device to device around the ring. Star topology: Within a star topology, all devices are connected to a central hub or computer. All data that transfers from one computer to another must pass through the hub. ...
Networks
... Each user controls the access to his own computer ( read only , hide files). Its suitable when : • 10 or less computers. • All computers in the same place. • Security is not an issue. • No network upgrading plans. ...
... Each user controls the access to his own computer ( read only , hide files). Its suitable when : • 10 or less computers. • All computers in the same place. • Security is not an issue. • No network upgrading plans. ...
Sullivan - Oregon State University
... • Acquisition and installation costs of a MUX • Cost of high bandwidth link between MUX and WAN (Internet) • Cost of low bandwidth link between end-user node and MUX ...
... • Acquisition and installation costs of a MUX • Cost of high bandwidth link between MUX and WAN (Internet) • Cost of low bandwidth link between end-user node and MUX ...
CHAP10
... The designers must review the list of applications that currently use the network and identify the location of each one so that all of them will be interconnected by the planned network (baselining). In many cases, the applications will be relatively well ...
... The designers must review the list of applications that currently use the network and identify the location of each one so that all of them will be interconnected by the planned network (baselining). In many cases, the applications will be relatively well ...
network of networks
... R = link bandwidth (bps) L = packet size (bits) Time required to send a packet onto the link = L/R ...
... R = link bandwidth (bps) L = packet size (bits) Time required to send a packet onto the link = L/R ...
294 Presentation “sensors for phishing”
... in a singlehop network no coordination is needed for routing/relaying ...
... in a singlehop network no coordination is needed for routing/relaying ...
Weidmuller Gigabit High-Performance Industrial Security Routers
... The integrated stateful inspection firewall is used to control incoming and outgoing traffic on all router interfaces (LAN, WAN, UMTS, VPN tunnels) on both Layer 2 (Ethernet frames) and Layer 3 (IP-based). An “auto-learning” function (“SecureNow!” ) is also incorporated; this performs an automatic a ...
... The integrated stateful inspection firewall is used to control incoming and outgoing traffic on all router interfaces (LAN, WAN, UMTS, VPN tunnels) on both Layer 2 (Ethernet frames) and Layer 3 (IP-based). An “auto-learning” function (“SecureNow!” ) is also incorporated; this performs an automatic a ...
Wireless Security
... the MAC address associated with a port to change once it is set. MAC changes can only be performed manually by the network ...
... the MAC address associated with a port to change once it is set. MAC changes can only be performed manually by the network ...
Physical Layer Repeater
... the number of nodes on a LONWORKS™ XP/FT-10 Free Topology network channel utilizing any type of Free Topology Transceiver (FT 3120, FT 3150, FT-5000, FTT-10A) or Link Power (LPT-10 ) transceiver. The FR-50 receives LONTALK™ packets from one channel segment and then passes them immediately to another ...
... the number of nodes on a LONWORKS™ XP/FT-10 Free Topology network channel utilizing any type of Free Topology Transceiver (FT 3120, FT 3150, FT-5000, FTT-10A) or Link Power (LPT-10 ) transceiver. The FR-50 receives LONTALK™ packets from one channel segment and then passes them immediately to another ...
Application Layer - Teknik Elektro UGM
... to their destination. The specific protocol that governs this layer is called the Internet Protocol (IP). Best path determination and packet switching occur at this layer. ...
... to their destination. The specific protocol that governs this layer is called the Internet Protocol (IP). Best path determination and packet switching occur at this layer. ...
