Networks - Burgate ICT
... • Data is sent from the sender to all other devices (nodes), this may be the server or a workstation. • There is no computer in control but there may be a server that stores the data files. • Advantages: simple, reliable, cheap, short cabling. • Disadvantage: slow when busy or a large network, as on ...
... • Data is sent from the sender to all other devices (nodes), this may be the server or a workstation. • There is no computer in control but there may be a server that stores the data files. • Advantages: simple, reliable, cheap, short cabling. • Disadvantage: slow when busy or a large network, as on ...
Document
... Used for the “reservation” of the medium and for ACKs ACK: sent by MAC sublevel to ACK a Data MAC_PDU. • Does not indicate that MAC_PDU destination has received it. RTS (Request to Send) / CTS (Clear to Send) for the reservation of the medium. • RTS is sent by MAC sublevel to request the use o ...
... Used for the “reservation” of the medium and for ACKs ACK: sent by MAC sublevel to ACK a Data MAC_PDU. • Does not indicate that MAC_PDU destination has received it. RTS (Request to Send) / CTS (Clear to Send) for the reservation of the medium. • RTS is sent by MAC sublevel to request the use o ...
Part I: Introduction - Northwestern University
... … physical-layer (“dumb”) repeaters: bits coming in one link go out all other links at same rate all nodes connected to hub can collide with one another no frame buffering no CSMA/CD at hub: host NICs detect collisions ...
... … physical-layer (“dumb”) repeaters: bits coming in one link go out all other links at same rate all nodes connected to hub can collide with one another no frame buffering no CSMA/CD at hub: host NICs detect collisions ...
Network Routing
... implication: to avoid conflict with ACK, any station hearing RTS should not send for NAV thus a station should not send for NAV if it hears either RTS and CTS ...
... implication: to avoid conflict with ACK, any station hearing RTS should not send for NAV thus a station should not send for NAV if it hears either RTS and CTS ...
4th Edition: Chapter 1 - Computer Science and Engineering
... 10 Mbs, 100Mbps, 1Gbps, 10Gbps Ethernet Today, end systems typically connect into Ethernet ...
... 10 Mbs, 100Mbps, 1Gbps, 10Gbps Ethernet Today, end systems typically connect into Ethernet ...
Receiver
... underlying channel may flip bits in packet recall: UDP checksum to detect bit errors the question: how to recover from errors: acknowledgements (ACKs): receiver explicitly tells sender ...
... underlying channel may flip bits in packet recall: UDP checksum to detect bit errors the question: how to recover from errors: acknowledgements (ACKs): receiver explicitly tells sender ...
Smart Dust and TinyOS: Hardware and Software for Network
... • This is the fundamental primitive that is buried underneath complex protocols like Bluetooth, but not made available. • It is what make it possible to build higher level protocols on the link, especially IP. • To determine connectivity, – Local broadcast – Respond – on-going protocol to estimate q ...
... • This is the fundamental primitive that is buried underneath complex protocols like Bluetooth, but not made available. • It is what make it possible to build higher level protocols on the link, especially IP. • To determine connectivity, – Local broadcast – Respond – on-going protocol to estimate q ...
Four Levels of Convergence - Rocky Mountain Avaya User`s Group
... mix with Gig Ethernet Devices – All Equipment must support QoS – A Switch failure or mis-configuration affects both voice and data – A IP Phone problem could affect the attached PC – Trouble Shooting voice problems - most difficult ...
... mix with Gig Ethernet Devices – All Equipment must support QoS – A Switch failure or mis-configuration affects both voice and data – A IP Phone problem could affect the attached PC – Trouble Shooting voice problems - most difficult ...
1p - Villanova Computer Science
... Ethernet – Collision Detection • IEEE 802.3 specifies max value of 2T to be 51.2μs – This relates to maximum distance of 2500m between hosts – At 10Mbps it takes 0.1μs to transmit one bit so 512 bits (64B) take 51.2μs to send ...
... Ethernet – Collision Detection • IEEE 802.3 specifies max value of 2T to be 51.2μs – This relates to maximum distance of 2500m between hosts – At 10Mbps it takes 0.1μs to transmit one bit so 512 bits (64B) take 51.2μs to send ...
The Integration of Amateur Radio and 802.11
... addressing and routing of information on the network. On the transport layer, error correcting techniques are employed.3 The session layer allows provisions for data exchange between applications as explained by Tuma and Fajfar. Tuma and Fajfar explained the presentation layer as the layer that ensu ...
... addressing and routing of information on the network. On the transport layer, error correcting techniques are employed.3 The session layer allows provisions for data exchange between applications as explained by Tuma and Fajfar. Tuma and Fajfar explained the presentation layer as the layer that ensu ...
Networking Concepts
... however, the extra shielding can make the cables quite bulky. • Shielded twisted pair is often used on networks using Token Ring topology. ...
... however, the extra shielding can make the cables quite bulky. • Shielded twisted pair is often used on networks using Token Ring topology. ...
Slide 1
... Each layer independent on the others Similar to TCP/IP(TCP/IP explained) OSI is used as a model for developing network aware applications(Here I mean that people use its structure to model software) ...
... Each layer independent on the others Similar to TCP/IP(TCP/IP explained) OSI is used as a model for developing network aware applications(Here I mean that people use its structure to model software) ...
Lecture #2
... packet arriving to full queue dropped (aka lost) lost packet may be retransmitted by previous node, by source end system, or not at all buffer (waiting area) ...
... packet arriving to full queue dropped (aka lost) lost packet may be retransmitted by previous node, by source end system, or not at all buffer (waiting area) ...
Internet Overview: Network Switching
... packet arriving to full queue dropped (aka lost) lost packet may be retransmitted by previous node, by source end system, or not at all buffer (waiting area) ...
... packet arriving to full queue dropped (aka lost) lost packet may be retransmitted by previous node, by source end system, or not at all buffer (waiting area) ...
CIS110 Assignment 3 2007-8
... c. A report from the World Wide Web Consortium laying down rules for data communication. d. A set of rules prohibiting obscene, defamatory or otherwise offensive content in emails and webpages. ...
... c. A report from the World Wide Web Consortium laying down rules for data communication. d. A set of rules prohibiting obscene, defamatory or otherwise offensive content in emails and webpages. ...
Slide 1
... P2P networks can be set up within the home, a business, or over the Internet. Each network type requires all computers in the network to use the same or a compatible program. P2P networks can be used for sharing content such as audio, video, data, or anything in digital format. Many peer-to-peer sys ...
... P2P networks can be set up within the home, a business, or over the Internet. Each network type requires all computers in the network to use the same or a compatible program. P2P networks can be used for sharing content such as audio, video, data, or anything in digital format. Many peer-to-peer sys ...
Lecture 2
... • Reliability: The server must make sure that the client gets the data Congestion control (or lack there of) (http://www.youtube.com/watch?v=RjrEQaG5jPM • Congestion Control: The server should send data as fast as possible, but not too fast • TCP provides these features (services), while UDP does no ...
... • Reliability: The server must make sure that the client gets the data Congestion control (or lack there of) (http://www.youtube.com/watch?v=RjrEQaG5jPM • Congestion Control: The server should send data as fast as possible, but not too fast • TCP provides these features (services), while UDP does no ...
Wireless Networks (continued)
... In a ring logical topology signals follow a circular path between sender and receiver Logical topologies is useful when troubleshooting and designing networks ...
... In a ring logical topology signals follow a circular path between sender and receiver Logical topologies is useful when troubleshooting and designing networks ...
Vanish : Increasing Data Privacy with Self-Destructing Data
... determines how many of N shares are needed to reconstruct K • EX: N = 20, threshold = 10 So any 10 of the 20 shares can be used • EX: N = 50, threshold = 50 Better have all shares… • VDO = (L, C, N, threshold), sent / stored ...
... determines how many of N shares are needed to reconstruct K • EX: N = 20, threshold = 10 So any 10 of the 20 shares can be used • EX: N = 50, threshold = 50 Better have all shares… • VDO = (L, C, N, threshold), sent / stored ...