Two-Step Delay Based Internet Gateway Selection Felix Hoffmann, Daniel Medina Adam Wolisz
... fact that nodes in a wireless ad hoc network must transmit and receive over the same interface. This is valid both for a contention-based MAC such as IEEE 802.11 and a contentionfree MAC, such as one based on TDMA. When a packet is taken from the queue, either to pass it up to the network layer or b ...
... fact that nodes in a wireless ad hoc network must transmit and receive over the same interface. This is valid both for a contention-based MAC such as IEEE 802.11 and a contentionfree MAC, such as one based on TDMA. When a packet is taken from the queue, either to pass it up to the network layer or b ...
Cache Increases the Capacity of Wireless Networks
... Wang [12] have proposed solutions to determine the optimal placement of replicas in the network. Fiore et al. [3] have proposed techniques to determine whether a node should cache the data to reduce data redundancy among neighbors. However, none of them have studied the fundamental performance limi ...
... Wang [12] have proposed solutions to determine the optimal placement of replicas in the network. Fiore et al. [3] have proposed techniques to determine whether a node should cache the data to reduce data redundancy among neighbors. However, none of them have studied the fundamental performance limi ...
Emulating an Embedded Firewall Clifford Neuman, Deepak Dayama, and Arun Viswanathan
... software on the end node to which the embedded firewall would have been attached can support Netfilter and iptables, then the end node can emulate the function of the embedded firewall without an auxiliary node. We can increase the likelihood of being able to emulate an embedded firewall on the end ...
... software on the end node to which the embedded firewall would have been attached can support Netfilter and iptables, then the end node can emulate the function of the embedded firewall without an auxiliary node. We can increase the likelihood of being able to emulate an embedded firewall on the end ...
WI-FI TECHNOLOGY: SECURITY ISSUES
... Since Windows XP™ there is a feature called zero configurations, which makes the user show any network available and let the end user connect to it on the fly. In the future, wireless cards will be more and more controlled by the operating system. Microsoft’s newest feature called SoftMAC will take ...
... Since Windows XP™ there is a feature called zero configurations, which makes the user show any network available and let the end user connect to it on the fly. In the future, wireless cards will be more and more controlled by the operating system. Microsoft’s newest feature called SoftMAC will take ...
PPT
... • A check bit at position 2^j, where j=0, 1, …, checks an information bit at position i if and only if the binary representation of i contains a 1 at position j. • The value of an “even” check bit equals the xor of all checked information bits • At the receiver side, all checked bits and the check b ...
... • A check bit at position 2^j, where j=0, 1, …, checks an information bit at position i if and only if the binary representation of i contains a 1 at position j. • The value of an “even” check bit equals the xor of all checked information bits • At the receiver side, all checked bits and the check b ...
IP Forwarding
... Example 3 Router R1 in Figure 6.8 receives a packet with destination address 167.24.160.5. Show how the packet is forwarded. Solution The destination address in binary is 10100111 00011000 10100000 00000101. A copy of the address is shifted 28 bits to the right. The result is 00000000 00000000 0000 ...
... Example 3 Router R1 in Figure 6.8 receives a packet with destination address 167.24.160.5. Show how the packet is forwarded. Solution The destination address in binary is 10100111 00011000 10100000 00000101. A copy of the address is shifted 28 bits to the right. The result is 00000000 00000000 0000 ...
Internetworking Between ZigBee/802.15.4 and IPv6/802.3 Network
... node wants to find some services in another network. In this case, the service discovery functions which are defined in ZDO will be transformed to the XML format at the gateway for the SSDP discovery and vice versa. ...
... node wants to find some services in another network. In this case, the service discovery functions which are defined in ZDO will be transformed to the XML format at the gateway for the SSDP discovery and vice versa. ...
Topic 8 – LAN Fundamentals
... transmitted or time for this opportunity • When a station has finished, it relinquishes its turn, and the right to transmit passes to the next station in logical sequence – The control of the sequence may be centralised or distributed – Polling is an example of a centralised technique ...
... transmitted or time for this opportunity • When a station has finished, it relinquishes its turn, and the right to transmit passes to the next station in logical sequence – The control of the sequence may be centralised or distributed – Polling is an example of a centralised technique ...
The Virtual Local Area Network (VLAN) Technology
... VLAN membership. Even though a switch inspects a packet’s IP address to determine VLAN membership, no route calculation is undertaken, RIP or OSPF protocols are not employed, and frames traversing the switch are usually bridged according to implementation of the Spanning Tree Algorithm. Therefore, f ...
... VLAN membership. Even though a switch inspects a packet’s IP address to determine VLAN membership, no route calculation is undertaken, RIP or OSPF protocols are not employed, and frames traversing the switch are usually bridged according to implementation of the Spanning Tree Algorithm. Therefore, f ...
EE 122: Computer Networks
... Security Implications of ICMP? • Attacker can cause host to accept an ICMP if the excerpt looks correct (assuming the host checks) – Must guess recent IP packet header & 8B of payload – All that really matters is source/destination addresses and ports ...
... Security Implications of ICMP? • Attacker can cause host to accept an ICMP if the excerpt looks correct (assuming the host checks) – Must guess recent IP packet header & 8B of payload – All that really matters is source/destination addresses and ports ...
1 Kyung Hee University Chapter 19 Network Layer
... When data arrive at interface f1 of R1, how does R1 know that interface f3 is the outgoing interface ? There is no provision in the data link (or physical) layer to help R1 make the right decision. The frame dose not carry any routing information either. The frame contains the MAC address of the ...
... When data arrive at interface f1 of R1, how does R1 know that interface f3 is the outgoing interface ? There is no provision in the data link (or physical) layer to help R1 make the right decision. The frame dose not carry any routing information either. The frame contains the MAC address of the ...
Chapter 21 - William Stallings, Data and Computer Communications
... Packet switched network (PSN) A network within a tunnel and identified by its tunnel through which the tunnels supporting the VPN multiplexer. In an MPLS-enabled IP network, services are set up. a VC label is an MPLS label used to identify traffic within a tunnel that belongs to a Provider edge (PE) ...
... Packet switched network (PSN) A network within a tunnel and identified by its tunnel through which the tunnels supporting the VPN multiplexer. In an MPLS-enabled IP network, services are set up. a VC label is an MPLS label used to identify traffic within a tunnel that belongs to a Provider edge (PE) ...
Secure Efficient Distance Vector Routing for Mobile Wireless Ad Hoc
... consume excess network bandwidth or processing time, we use efficient one-way hash functions and do not use asymmetric cryptographic operations in the protocol. In Section 2 of this paper, we summarize the basic operation of distance vector routing, and we describe the DSDV ad hoc network routing pr ...
... consume excess network bandwidth or processing time, we use efficient one-way hash functions and do not use asymmetric cryptographic operations in the protocol. In Section 2 of this paper, we summarize the basic operation of distance vector routing, and we describe the DSDV ad hoc network routing pr ...
Distributed Computing in Peer-to-peer Networks Emir Ahmetspahi´ c
... Condor started its life as a part of the Condor Research Project at the University of Wisconsin-Madison. The goal of the project is to develop mechanism and policies that would enable High Throughput Computing on large collections of distributively owned heterogeneous computing resources. Condor org ...
... Condor started its life as a part of the Condor Research Project at the University of Wisconsin-Madison. The goal of the project is to develop mechanism and policies that would enable High Throughput Computing on large collections of distributively owned heterogeneous computing resources. Condor org ...
Tree-based IP lookup
... The longest matching prefix of a network can be determined in 5 steps with 9 or more branching factor. In the worst case, we need at most 2 times of total prefix data size of memory to implement the scheme. For instance, for 50,000 prefixes of 32bit, we need at most 3.2 Mbit of memory. Univ. of ...
... The longest matching prefix of a network can be determined in 5 steps with 9 or more branching factor. In the worst case, we need at most 2 times of total prefix data size of memory to implement the scheme. For instance, for 50,000 prefixes of 32bit, we need at most 3.2 Mbit of memory. Univ. of ...
HotView Pro™ Mesh Management Software
... The software’s MultiMesh™ capability enables an authorized administrator to manage multiple mesh networks from a single screen. These networks can be independent, or integrated with MeshBridge™ to form a single mesh environment with up to 1000 nodes. Real-time monitoring depicts a graphical view of ...
... The software’s MultiMesh™ capability enables an authorized administrator to manage multiple mesh networks from a single screen. These networks can be independent, or integrated with MeshBridge™ to form a single mesh environment with up to 1000 nodes. Real-time monitoring depicts a graphical view of ...
CCNA3 3.0-04 Questions Review of Switching
... What is designed to prevent multiple devices on an Ethernet network from transmitting at the same time? ...
... What is designed to prevent multiple devices on an Ethernet network from transmitting at the same time? ...
Slide 1
... Several alternative protocols for mapping between messages and datagrams TCP - the Transmission Control Protocol Used for messages that are spread across multiple datagrams Combines IP and ARQ techniques to provide reliable, sequenced data delivery UDP - the User Datagram Protocol Sends single packe ...
... Several alternative protocols for mapping between messages and datagrams TCP - the Transmission Control Protocol Used for messages that are spread across multiple datagrams Combines IP and ARQ techniques to provide reliable, sequenced data delivery UDP - the User Datagram Protocol Sends single packe ...
ppt
... Broadcast Topology known as “bus logical topology”. A data message is sent simultaneously to all nodes on the network. Each node decides individually if the data message was directed toward it. If not, the message is ignored. No need to pass the message to a neighboring node. Also ...
... Broadcast Topology known as “bus logical topology”. A data message is sent simultaneously to all nodes on the network. Each node decides individually if the data message was directed toward it. If not, the message is ignored. No need to pass the message to a neighboring node. Also ...
PPT
... IP Fragmentation & Reassembly • Network links have MTU (max.transfer size) - largest possible link-level frame. • different link types, different MTUs • Large IP datagram divided (“fragmented”) within net • one datagram becomes several datagrams • IP header bits used to identify, order related frag ...
... IP Fragmentation & Reassembly • Network links have MTU (max.transfer size) - largest possible link-level frame. • different link types, different MTUs • Large IP datagram divided (“fragmented”) within net • one datagram becomes several datagrams • IP header bits used to identify, order related frag ...
Current Good Best Practice Guide
... RFC 1191 describes a method for a sender to detect the Path MTU to a given receiver. This method is widely implemented, but is not robust in today's Internet because it relies on ‘ICMP Destination Unreachable Fragmentation Needed’ messages that must be sent by the routers back to the source host tha ...
... RFC 1191 describes a method for a sender to detect the Path MTU to a given receiver. This method is widely implemented, but is not robust in today's Internet because it relies on ‘ICMP Destination Unreachable Fragmentation Needed’ messages that must be sent by the routers back to the source host tha ...