Introduction to Wireless Communications & Networks
... If more than one station are sensing, then they will begin transmission the same time when channel becomes idle, so collision. At this time, each station executes a backoff algorithm to wait for a random time, and then re-sense the channel again. ...
... If more than one station are sensing, then they will begin transmission the same time when channel becomes idle, so collision. At this time, each station executes a backoff algorithm to wait for a random time, and then re-sense the channel again. ...
Communications on the Internet are not efficient.
... Data link layer (layer 2) • Data can be sent between local area network devices at layer 2. • Data is broken down into smaller chunks of data called packets. • Different data link transmission protocols can be used. • Ethernet has become the common standard and uses 48-bit (6 bytes) source and dest ...
... Data link layer (layer 2) • Data can be sent between local area network devices at layer 2. • Data is broken down into smaller chunks of data called packets. • Different data link transmission protocols can be used. • Ethernet has become the common standard and uses 48-bit (6 bytes) source and dest ...
Lecture note 7
... • TCP’s sequence number is in bytes, rather than in packets. The length of the sequence number field is 32 bits. • On a gigabit network, it would take only 32 seconds to wrap around a sequence number! The TTL field in the IP header just limits the maximum number of hops a packet can traverse. It doe ...
... • TCP’s sequence number is in bytes, rather than in packets. The length of the sequence number field is 32 bits. • On a gigabit network, it would take only 32 seconds to wrap around a sequence number! The TTL field in the IP header just limits the maximum number of hops a packet can traverse. It doe ...
slides - TNC15
... • It was a peer network of communicating equals not a hierarchical network connecting a mainframe master with terminal slaves. • The approach required coordinating distributed shared state at different scopes, which were treated as black boxes. This lead to the concept of layers being adopted from o ...
... • It was a peer network of communicating equals not a hierarchical network connecting a mainframe master with terminal slaves. • The approach required coordinating distributed shared state at different scopes, which were treated as black boxes. This lead to the concept of layers being adopted from o ...
Prince Mohammad Bin Fahd University Network Management
... eight floors and in total contains 600 computers connected in server-client connection. All the computers of each floor are connected together using switches then the floors are connected together using primary and secondary fiber optic cables This difference between secondary and primary fiber opti ...
... eight floors and in total contains 600 computers connected in server-client connection. All the computers of each floor are connected together using switches then the floors are connected together using primary and secondary fiber optic cables This difference between secondary and primary fiber opti ...
EQ23854856
... network traffic monitoring, traffic analysis, troubleshooting and other useful purposes. When computers communicate over networks, they normally just listen to the traffic specifically for them. However, network cards have the ability to enter promiscuous mode, which allows them to listen to all net ...
... network traffic monitoring, traffic analysis, troubleshooting and other useful purposes. When computers communicate over networks, they normally just listen to the traffic specifically for them. However, network cards have the ability to enter promiscuous mode, which allows them to listen to all net ...
1 H O W W I - F I ...
... center frequency of a 22 MHz channel. Therefore, each channel overlaps several other channels that are above and below it. The whole 2.4 GHz band has space for only three completely separate channels, so if your network runs on, say, Channel 4, and your neighbor is using Channel 5 or Channel 6, each ...
... center frequency of a 22 MHz channel. Therefore, each channel overlaps several other channels that are above and below it. The whole 2.4 GHz band has space for only three completely separate channels, so if your network runs on, say, Channel 4, and your neighbor is using Channel 5 or Channel 6, each ...
Case Study: Infiniband
... – 24 expansion slots, each expansion model 12 port 4X or 4 port 12X (24x12 = 288, 288 by 288 switch) – switch type cut-through – switch latency: < 140ns to < 420ns – switch bandwidth: 5.76Tbps – forwarding table size: 48K – VL support: 8 + 1 management ...
... – 24 expansion slots, each expansion model 12 port 4X or 4 port 12X (24x12 = 288, 288 by 288 switch) – switch type cut-through – switch latency: < 140ns to < 420ns – switch bandwidth: 5.76Tbps – forwarding table size: 48K – VL support: 8 + 1 management ...
投影片 1
... FileSystem/Inspector • The FileSystem is a tree-based view of all the directories mounted in the QualNet ...
... FileSystem/Inspector • The FileSystem is a tree-based view of all the directories mounted in the QualNet ...
Exam Viewer - ENetwork Final Exam
... compromising exam security for other Cisco Networking Academies or students. This material should not be distributed outside a proctored and controlled setting. If misuse is found, action will be taken to limit access to assessment content. Please remember to logout and close your browser window aft ...
... compromising exam security for other Cisco Networking Academies or students. This material should not be distributed outside a proctored and controlled setting. If misuse is found, action will be taken to limit access to assessment content. Please remember to logout and close your browser window aft ...
Reliable, Low Power Wireless Sensor Networks for the Internet of
... with the goal of making small wireless sensors as easy to access as web servers. These efforts are the confluence of two driving forces: the proven low power, highly reliable performance of time-synchronized mesh networks, and the ongoing IP standards efforts for seamless integration into the Intern ...
... with the goal of making small wireless sensors as easy to access as web servers. These efforts are the confluence of two driving forces: the proven low power, highly reliable performance of time-synchronized mesh networks, and the ongoing IP standards efforts for seamless integration into the Intern ...
Ch 1 Introduction Overview
... – the subject may only seem useful for engineers who design low-level transmission facilities • However, we will see that several key concepts that arise from data communications influence the design of many protocol layers ...
... – the subject may only seem useful for engineers who design low-level transmission facilities • However, we will see that several key concepts that arise from data communications influence the design of many protocol layers ...
ppt
... categorized with respect to transmission range. (a) Inter-chip connection, (b) Visible light communication for indoor wireless access, (c) Inter-building connections, (d) Inter-satellite links [1] Fig. 2. Some typical applications of FSO: (a) An envisioned campus connectivity scenario where inter-bu ...
... categorized with respect to transmission range. (a) Inter-chip connection, (b) Visible light communication for indoor wireless access, (c) Inter-building connections, (d) Inter-satellite links [1] Fig. 2. Some typical applications of FSO: (a) An envisioned campus connectivity scenario where inter-bu ...
LN14 - The School of Electrical Engineering and Computer Science
... – If a node fails, may need to rebuild the whole tree and re-run protocol – Need to detect the failure, could cause high uncertainty ...
... – If a node fails, may need to rebuild the whole tree and re-run protocol – Need to detect the failure, could cause high uncertainty ...
Lectures 26&27 - Electrical and Computer Engineering
... number” that is typically between 0-7, but could be between 0 and (2**n)-1, where n is between 3 and 7 Frames are acknowledged after they are correctly received The maximum number of outstanding, unacknowledged ...
... number” that is typically between 0-7, but could be between 0 and (2**n)-1, where n is between 3 and 7 Frames are acknowledged after they are correctly received The maximum number of outstanding, unacknowledged ...
A Distributed Infrared Temperature Monitoring System
... For the shortcomings of traditional measurement system, the paper design a distributed infrared temperature monitoring system based on embedded and visualization technologies, The system has the following characteristics: (1) using microprocessor equipped with non-contact infrared temperature sensor ...
... For the shortcomings of traditional measurement system, the paper design a distributed infrared temperature monitoring system based on embedded and visualization technologies, The system has the following characteristics: (1) using microprocessor equipped with non-contact infrared temperature sensor ...
Document
... has only 4 fields. Lenght is in bytes and deals with the whole T_PDU, including the header. ...
... has only 4 fields. Lenght is in bytes and deals with the whole T_PDU, including the header. ...
PowerPoint
... But, agents can compare their utility in some way with agents in other tribes and move to them if they appear to be doing better also copying better agents behavior in some way The “tag” is just the identifier that indicates which tribe the agent is in. Hence agents sharing the same tag inhabit the ...
... But, agents can compare their utility in some way with agents in other tribes and move to them if they appear to be doing better also copying better agents behavior in some way The “tag” is just the identifier that indicates which tribe the agent is in. Hence agents sharing the same tag inhabit the ...
GPSR: Greedy Perimeter Stateless Routing for Wireless Networks
... Simulations are for networks of 50, 112, and 200 nodes with 802.11 WaveLAN radios, with a nominal 250-meter range. The nodes are initially placed uniformly at random in a rectangular region. All nodes move according to the random waypoint model, with a maximum velocity of 20 m/s. Pause times simulat ...
... Simulations are for networks of 50, 112, and 200 nodes with 802.11 WaveLAN radios, with a nominal 250-meter range. The nodes are initially placed uniformly at random in a rectangular region. All nodes move according to the random waypoint model, with a maximum velocity of 20 m/s. Pause times simulat ...
PPT - University of Michigan
... - delivered out of order to app connectionless: - no handshaking between UDP sender, receiver - each UDP segment handled independently of others ...
... - delivered out of order to app connectionless: - no handshaking between UDP sender, receiver - each UDP segment handled independently of others ...
Introduction
... 3. Transports isolated messages, with no guarantee about the order of delivery. 4. Broadcasts messages to multiple destinations. Multimedia Networking - Introduction to Computer Network (Dr. Hussein Al-Bahadili) ...
... 3. Transports isolated messages, with no guarantee about the order of delivery. 4. Broadcasts messages to multiple destinations. Multimedia Networking - Introduction to Computer Network (Dr. Hussein Al-Bahadili) ...