Chapter 7
... whether the media is carrying any signal. If a signal is detected, that means another device is transmitting. The device only transmit if it sense that the network is idle. Otherwise it will wait and try again later. ...
... whether the media is carrying any signal. If a signal is detected, that means another device is transmitting. The device only transmit if it sense that the network is idle. Otherwise it will wait and try again later. ...
High-Level Data Link Control
... – It is not possible to perform flow/error control since there are no sequence numbers – Data link layer only does: separating frames using flags; forcing data transparency by bit stuffing; checking frames for errors, and frames with errors are simply discarded – Error and flow control, if implement ...
... – It is not possible to perform flow/error control since there are no sequence numbers – Data link layer only does: separating frames using flags; forcing data transparency by bit stuffing; checking frames for errors, and frames with errors are simply discarded – Error and flow control, if implement ...
Comm `n Sense: Research Issues in Wireless Sensor Networks
... • Network nodes close to tracked event (or with good data on the event) enter fully active state; other nodes dormant/low ...
... • Network nodes close to tracked event (or with good data on the event) enter fully active state; other nodes dormant/low ...
A Wireless Intrusion Detection System and a new
... events from the network. First we start from the first list and for every event we try to find a matching event on the second list that is, given a packet we look for it on the second list. As we do this process of matching the events on the sending and receiving list . if we find unmatched events o ...
... events from the network. First we start from the first list and for every event we try to find a matching event on the second list that is, given a packet we look for it on the second list. As we do this process of matching the events on the sending and receiving list . if we find unmatched events o ...
Interconnection Networks
... Ethernet Protocol - Shared • Ethernet is an example of a shared media - similar to a bus • The ethernet nodes must coordinate so that only one message is sent at a time. – Nodes “listens” to the network to ensure it is not being used. – If the network is not being used, the node tries to send the m ...
... Ethernet Protocol - Shared • Ethernet is an example of a shared media - similar to a bus • The ethernet nodes must coordinate so that only one message is sent at a time. – Nodes “listens” to the network to ensure it is not being used. – If the network is not being used, the node tries to send the m ...
Computer Network Final Exam 2005
... same collision domain. Whenever two or more nodes on the LAN segments transmit at the same time, there will be a collision. All of the transmitting nodes will enter exponential backoff. Individual segment collision domains become one large collision domain and bandwidth can not be aggregated Switch ...
... same collision domain. Whenever two or more nodes on the LAN segments transmit at the same time, there will be a collision. All of the transmitting nodes will enter exponential backoff. Individual segment collision domains become one large collision domain and bandwidth can not be aggregated Switch ...
The Open System Interconnection (OSI)
... Usually used in a bus topology Used in Ethernet LAN’s Unlike the token ring, all nodes can send whenever they have data to transmit When a node wants to transmit information, it first “listens” to the network. If no one is transmitting over the network, the node begins transmission It is however pos ...
... Usually used in a bus topology Used in Ethernet LAN’s Unlike the token ring, all nodes can send whenever they have data to transmit When a node wants to transmit information, it first “listens” to the network. If no one is transmitting over the network, the node begins transmission It is however pos ...
Stochastic Analysis of Dynamic Computer Processes
... • The network can maintain a bounded number of connections with high probability. • The overhead involved per protocol step is constant. • What if there are no preferred connections ? − Running the protocol without it leads to formation of many small disconnected ...
... • The network can maintain a bounded number of connections with high probability. • The overhead involved per protocol step is constant. • What if there are no preferred connections ? − Running the protocol without it leads to formation of many small disconnected ...
Bridging the Gap
... To use the network transport and switching technologies as an example … • Clearly (at least IMHO ) 40 Gbps or even 100 Gbps transmission technologies will not be adequate to meet the [e-science] needs 4 or 5 ...
... To use the network transport and switching technologies as an example … • Clearly (at least IMHO ) 40 Gbps or even 100 Gbps transmission technologies will not be adequate to meet the [e-science] needs 4 or 5 ...
or “Tipping Point Protocols”
... Broadcast in an Ad-Hoc Network • Ad-hoc sensor network (Grid example below) • One node has a piece of information that it needs to broadcast: e.g., (1) code update, (2) query • Simple approach: each node floods received message to all its neighbors – Disadvantages? ...
... Broadcast in an Ad-Hoc Network • Ad-hoc sensor network (Grid example below) • One node has a piece of information that it needs to broadcast: e.g., (1) code update, (2) query • Simple approach: each node floods received message to all its neighbors – Disadvantages? ...
Logical addressing
... TCP/IP. Logical addressing is an addressing scheme above the physical addressing. This is used for universal communication between different networks. The most popular logical addressing protocol is Internet Protocol (IP). ...
... TCP/IP. Logical addressing is an addressing scheme above the physical addressing. This is used for universal communication between different networks. The most popular logical addressing protocol is Internet Protocol (IP). ...
AX31338342
... such as web-pages, database information, etc. Streaming media such as video ,audio and others use UDP because it offers speed. The reason UDP is faster than TCP is because there is no form of flow control. No error checking, error ...
... such as web-pages, database information, etc. Streaming media such as video ,audio and others use UDP because it offers speed. The reason UDP is faster than TCP is because there is no form of flow control. No error checking, error ...
Establishing a common language
... Shared services and infrastructure Definition: The common technical services and infrastructure that support or enhance the basic operation of a Flow. These services do not, by themselves flow information, but they materially support (sometimes in an essential technical way) Partner Flows. ...
... Shared services and infrastructure Definition: The common technical services and infrastructure that support or enhance the basic operation of a Flow. These services do not, by themselves flow information, but they materially support (sometimes in an essential technical way) Partner Flows. ...
SkipNet: A Scalable Overlay Network with Practical Locality Properties
... CLB with a more flexible subset of the network Clustering A collaborative uploading/downloading ...
... CLB with a more flexible subset of the network Clustering A collaborative uploading/downloading ...
Wireless Sensor Networks M Homework #1
... transmission range equal to the sensing range equal to 6 d. Nodes use a transmit power of 0 dBm, use BE mode and do not use GTSs and transmit packets of 20 bytes. In the area where nodes are deployed there are 2 access points Wi-Fi working on channels 1 and 6 using a transmit power of 20 dBm and ano ...
... transmission range equal to the sensing range equal to 6 d. Nodes use a transmit power of 0 dBm, use BE mode and do not use GTSs and transmit packets of 20 bytes. In the area where nodes are deployed there are 2 access points Wi-Fi working on channels 1 and 6 using a transmit power of 20 dBm and ano ...
Computer Networks
... ◦ In computer networking, a single layer-2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers; such a domain is referred to as a virtual local area network, ...
... ◦ In computer networking, a single layer-2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers; such a domain is referred to as a virtual local area network, ...
Networking - Faculty of Computer Science and Information Technology
... Local Area Network Wide Area Network Organization of Resources Protocol Software Communication Applications ...
... Local Area Network Wide Area Network Organization of Resources Protocol Software Communication Applications ...
Distributed Databases
... Timestamping Protocols • One site could issue all timestamps • Instead, multiple sites could issue them – Each timestamp has two parts-the time and the node identifier – Guarantees uniqueness of timestamps – Difficult to synchronize clocks-to control divergence, can advance clock reading if later t ...
... Timestamping Protocols • One site could issue all timestamps • Instead, multiple sites could issue them – Each timestamp has two parts-the time and the node identifier – Guarantees uniqueness of timestamps – Difficult to synchronize clocks-to control divergence, can advance clock reading if later t ...
